This page lists 177 engine parts for the 1966 Avanti Ii, across 34 part types, covering the 5.3L 327cid V8 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 1966 Avanti Ii, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components. Most of the listed parts are Valve Cover Gasket (16 parts), Crankshaft Seal (13 parts) and Connecting Rod Bearing (11 parts). The other 31 part types cover the remaining 137 parts.
Every part on this page is matched to the 5.3L 327cid V8 — the only engine offered in the 1966 Avanti Ii.
The most listed brands for 1966 Avanti Ii engine parts are MAHLE / CLEVITE (37 parts), FEL-PRO (32 parts) and ARP (31 parts), plus 10 more brands. Quality grades include Standard Replacement, High Performance and Premium.
32 parts on this 1966 Avanti Ii page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including KING ENGINE BEARINGS CR807XPN (Connecting Rod Bearing) and APEX ACS3022 (Conversion / Lower Gasket Set). Click any part number to see every vehicle that part fits.
Bolt Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 5349701 | 🇺🇸 US 🇨🇦 CA | Black Oxide12 Point Bolt Head | View on Amazon |
| ARP | 5349801 | 🇺🇸 US 🇨🇦 CA | Hex Bolt Head | View on Amazon |
| ARP | 5349601 | 🇺🇸 US 🇨🇦 CA | Stainless Steel Hex Bolt Head | View on Amazon |
| ARP | 5349501 | 🇺🇸 US 🇨🇦 CA | Stainless Steel12 Point Bolt Head | View on Amazon |
This table covers the Bolt kits.
4 Bolt Kit parts for the 1966 Avanti Ii come from ARP.
Listed part numbers: ARP 5349701, ARP 5349801 and ARP 5349601, plus the other parts above.
Camshaft Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 1341001 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Camshaft bolts.
One part is listed for the 1966 Avanti Ii — ARP 1341001.
Connecting Rod Bearing
High Performance
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS Popular | CR807XPN | 🇺🇸 US | SetRace bearings, Trimetal [Pmax Black] | View on Amazon |
| KING ENGINE BEARINGS | CR807HPND | 🇺🇸 US | SetRace bearings, Bimetal (Alecular) | View on Amazon |
| KING ENGINE BEARINGS | CR807HPNDX | 🇺🇸 US | SetRace bearings, Bimetal (Alecular) | View on Amazon |
| KING ENGINE BEARINGS | CR807XPNX | 🇺🇸 US | Race bearings, Trimetal [Pmax Black]Set | View on Amazon |
| KING ENGINE BEARINGS | CR807XPND | 🇺🇸 US | Race bearings, Trimetal [Pmax Black]Set | View on Amazon |
| KING ENGINE BEARINGS | CR807XPNDX | 🇺🇸 US | Race bearings, Trimetal [Pmax Black]Set | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS Popular | CR807SI | 🇺🇸 US | SetBimetal (Aluminum Silicon Base) | View on Amazon |
| KING ENGINE BEARINGS Popular | CR807SIX | 🇺🇸 US | Setbimetal (aluminum silicon base) | View on Amazon |
| KING ENGINE BEARINGS | CR865SI | 🇺🇸 US | SetBimetal (Aluminum Silicon Base) | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS | CR807HPNX | 🇺🇸 US | Race bearings, Bimetal (Alecular)Set | View on Amazon |
| KING ENGINE BEARINGS | CR807HPN | 🇺🇸 US | SetRace bearings, Bimetal (Alecular) | View on Amazon |
This table covers the bearings in the connecting-rod big ends. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
11 Connecting Rod Bearing parts for the 1966 Avanti Ii come from KING ENGINE BEARINGS. The "Popular" part is KING ENGINE BEARINGS CR807XPN.
The High Performance section lists 6 options from KING ENGINE BEARINGS — engineered beyond original-equipment specification. KING ENGINE BEARINGS CR807XPN is listed in this group.
In the Standard Replacement grade, KING ENGINE BEARINGS supplies 3 parts: built to original-equipment specification. A representative part number is KING ENGINE BEARINGS CR807SI.
2 further parts sit outside the graded sections, with the same engine-level match.
Connecting Rod Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 1346001 | 🇺🇸 US 🇨🇦 CA | Small Journal 11/32" | View on Amazon |
This table covers the Connecting Rod bolts.
One part is listed for the 1966 Avanti Ii — ARP 1346001.
Conversion / Lower Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| APEX Popular | ACS3022 | 🇺🇸 US | View on Amazon | |
| ENGINE PRO | 3777332 | 🇺🇸 US | View on Amazon | |
| FEL-PRO | CS77332 | 🇺🇸 US | Multi-PieceRear Main Seal Not Included | View on Amazon |
| MAHLE / CLEVITE | CS1178 | 🇺🇸 US | Includes 2 Piece Rear Main Seal | View on Amazon |
| VICTOR REINZ | 081005601 | 🇺🇸 US | with 2 Piece Rear Main Seal | View on Amazon |
This table covers lower / conversion gasket sets for oil-pan and related joints. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration.
5 Conversion / Lower Gasket Set parts for the 1966 Avanti Ii come from 5 brands — APEX, ENGINE PRO, FEL-PRO and 2 other brands. The "Popular" part is APEX ACS3022.
This group includes APEX ACS3022, ENGINE PRO 3777332 and FEL-PRO CS77332 and the remaining parts above.
Crankshaft Main Bearing
High Performance
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS Popular | MB557XP | 🇺🇸 US | SetRace bearings, Trimetal [Pmax Black] | View on Amazon |
| KING ENGINE BEARINGS | MB557HP | 🇺🇸 US | alecular (racing line)Set | View on Amazon |
| KING ENGINE BEARINGS | MB557HPX | 🇺🇸 US | alecular (racing line)Set | View on Amazon |
| KING ENGINE BEARINGS | MB557XPX | 🇺🇸 US | Race bearings, Trimetal [Pmax Black]Set | View on Amazon |
| KING ENGINE BEARINGS | MB557XPC | 🇺🇸 US | pmaxkote (racing line), polymer coatedSet | View on Amazon |
| KING ENGINE BEARINGS | MB557XPCX | 🇺🇸 US | pmaxkote (racing line), polymer coatedSet | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS Popular | MB557SI | 🇺🇸 US | SetBimetal (Aluminum Silicon Base) | View on Amazon |
This table covers the main bearings that support the crankshaft in the block. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
KING ENGINE BEARINGS supplies the 7 Crankshaft Main Bearing parts for the 1966 Avanti Ii. KING ENGINE BEARINGS MB557XP carries the "Popular" badge.
High Performance: 6 parts, from KING ENGINE BEARINGS. A representative part number is KING ENGINE BEARINGS MB557XP.
The Standard Replacement section: 1 option from KING ENGINE BEARINGS. KING ENGINE BEARINGS MB557SI is listed in this group.
Listed part numbers: KING ENGINE BEARINGS MB557XP, KING ENGINE BEARINGS MB557HP and KING ENGINE BEARINGS MB557HPX, plus the other parts above.
Crankshaft Main Bearing Cap Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 1345401 | 🇺🇸 US 🇨🇦 CA | Stud2-Bolt | View on Amazon |
| ARP | 1345601 | 🇺🇸 US 🇨🇦 CA | Stud4-Bolt | View on Amazon |
This table covers the Crankshaft Main Bearing Cap bolts.
2 Crankshaft Main Bearing Cap Bolt parts for the 1966 Avanti Ii come from ARP.
This group includes ARP 1345401 and ARP 1345601.
Crankshaft Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL | 99176 | 🇺🇸 US | Front0.563 IN Width | View on Amazon |
| WJB / INMOTION PARTS | WS99176 | 🇺🇸 US | Installation Depth: 0.81299999999999994 InShaft Diameter Minimum (In): 1.7609999999999999 In | View on Amazon |
This table covers the sleeves used to restore a grooved crankshaft seal surface.
2 Crankshaft Repair Sleeve parts are listed for the 1966 Avanti Ii, from NATIONAL and WJB / INMOTION PARTS.
Listed part numbers: NATIONAL 99176 and WJB / INMOTION PARTS WS99176.
Crankshaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | BS40013 | 🇺🇸 US | Rubber | View on Amazon |
| FEL-PRO Popular | BS118291 | 🇺🇸 US | Rubber | View on Amazon |
| NATIONAL Popular | 9845 | 🇺🇸 US | Front0.375 IN Width | View on Amazon |
| APEX | ABS322 | 🇺🇸 US | Rear | View on Amazon |
| BCA | NS9845 | 🇺🇸 US | Front0.375 IN Width | View on Amazon |
| MAHLE / CLEVITE | JV1627 | 🇺🇸 US | RubberSet | View on Amazon |
| NATIONAL | 5092 | 🇺🇸 US | RearSplit Type | View on Amazon |
| SCHAEFFLER | SS2784 | 🇺🇸 US | Front9.53 mm Width | View on Amazon |
| SCHAEFFLER | SR3932 | 🇺🇸 US | View on Amazon | |
| VICTOR REINZ | 191006901 | 🇺🇸 US | Set | View on Amazon |
| VICTOR REINZ | 191011601 | 🇺🇸 US | SetRubber | View on Amazon |
| WJB / INMOTION PARTS | WS5092 | 🇺🇸 US | Housing Bore: 3 InMaterial: Silicone | View on Amazon |
| WJB / INMOTION PARTS | WS9845 | 🇺🇸 US | Housing Bore: 2.4089999999999998 InInside Diameter: 1.7629999999999999 In | View on Amazon |
This table covers the front and rear seals that keep oil in at the crankshaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
13 Crankshaft Seal parts are listed for the 1966 Avanti Ii, from FEL-PRO, NATIONAL, SCHAEFFLER and 5 other brands. FEL-PRO BS40013 carries the "Popular" badge.
Cylinder Head Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP Popular | 1343601 | 🇺🇸 US 🇨🇦 CA | SetHex Bolt Head | View on Amazon |
| FEL-PRO Popular | ES72856 | 🇺🇸 US | Set | View on Amazon |
| APEX | AHB322 | 🇺🇸 US | Set | View on Amazon |
| ARP | 1343701 | 🇺🇸 US 🇨🇦 CA | SetBlack Oxide | View on Amazon |
| ARP | 1343703 | 🇺🇸 US 🇨🇦 CA | SetBlack Oxide Inner Rows, Stainless Steel Outer Row | View on Amazon |
| ARP | 1343603 | 🇺🇸 US 🇨🇦 CA | SetStainless Steel Hex Bolt Head | View on Amazon |
| ARP | 1344001 | 🇺🇸 US 🇨🇦 CA | Stud TypeHex Bolt Head | View on Amazon |
| MAHLE / CLEVITE | GS33285 | 🇺🇸 US | Cylinder Head Bolt KitSet | View on Amazon |
| VICTOR REINZ | 141004801 | 🇺🇸 US | Set | View on Amazon |
This table covers the bolts that clamp the cylinder head to the block.
9 Cylinder Head Bolt parts for the 1966 Avanti Ii come from 5 brands — ARP, FEL-PRO, APEX and 2 other brands. The "Popular" part is ARP 1343601.
Part numbers include ARP 1343601, FEL-PRO ES72856 and APEX AHB322, among others listed above.
Cylinder Head Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | 7733SH1 | 🇺🇸 US | with Embossed Steel Head Gaskets | View on Amazon |
| FEL-PRO Popular | 7733PT2 | 🇺🇸 US | Permatorque | View on Amazon |
| FEL-PRO Popular | 501SD | 🇺🇸 US | Permatorque Severe Duty | View on Amazon |
| APEX | AHG322 | 🇺🇸 US | View on Amazon | |
| ENGINE PRO | 281000 | 🇺🇸 US | View on Amazon | |
| FEL-PRO | 8651PT | 🇺🇸 US | with High Performance Engine | View on Amazon |
| MAHLE / CLEVITE | 1178BS | 🇺🇸 US | Beaded Steel | View on Amazon |
| MAHLE / CLEVITE | 1178VC | 🇺🇸 US | Composite | View on Amazon |
| MAHLE / CLEVITE | 54052 | 🇺🇸 US | Graphite | View on Amazon |
| MAHLE / CLEVITE | 1178SG | 🇺🇸 US | Graphite | View on Amazon |
| VICTOR REINZ | 611031900 | 🇺🇸 US | 0.045 IN Thick | View on Amazon |
This table covers the head gaskets that seal the block to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
11 Cylinder Head Gasket parts for the 1966 Avanti Ii come from 5 brands — FEL-PRO, MAHLE / CLEVITE, APEX and 2 other brands. The "Popular" part is FEL-PRO 7733SH1.
Cylinder Head Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| APEX Popular | AHS3022 | 🇺🇸 US | View on Amazon | |
| FEL-PRO Popular | HS7733PT2 | 🇺🇸 US | 2-1/2 (In) Inside Diameter & 2-17/32 (In) Inside Diameter Exhaust Pipe Packing Not Included.2-17/32 (In) Inside Diameter Exhaust Pipe Packing Not Included | View on Amazon |
| FEL-PRO | HS7733SH2 | 🇺🇸 US | with Embossed Steel Head Gaskets2-17/32 (In) Inside Diameter Exhaust Pipe Packing Not Included | View on Amazon |
| FEL-PRO | HS7733PT2VK | 🇺🇸 US | 2-1/2 (In) Inside Diameter & 2-17/32 (In) Inside Diameter Exhaust Pipe Packing Not Included.Permatorque | View on Amazon |
| FEL-PRO | HS7733SH2VK | 🇺🇸 US | 2-17/32 (In) Inside Diameter Exhaust Pipe Packing Not Includedwith Embossed Steel Head Gaskets | View on Amazon |
| MAHLE / CLEVITE | HS1178BJ | 🇺🇸 US | Contains Beaded Steel Cylinder Head GasketIncludes Valve Stem Seals | View on Amazon |
| MAHLE / CLEVITE | HS1178VJ | 🇺🇸 US | Contains Composite Cylinder Head Gasket, Exhaust Pipe Gasket Not IncludedIncludes Valve Stem Seals | View on Amazon |
| VICTOR REINZ | 021007601 | 🇺🇸 US | with Multi-Layer Steel Head Gasket | View on Amazon |
This table covers multi-piece gasket sets for a cylinder-head job. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration.
8 Cylinder Head Gasket Set parts for the 1966 Avanti Ii come from 4 brands — FEL-PRO, MAHLE / CLEVITE, APEX and 1 other brand. The "Popular" part is APEX AHS3022.
Part numbers include APEX AHS3022, FEL-PRO HS7733PT2 and FEL-PRO HS7733SH2, among others listed above.
Cylinder Head Spacer Shim
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MAHLE / CLEVITE | 55138 | 🇺🇸 US | View on Amazon | |
| VICTOR REINZ | 711382900 | 🇺🇸 US | View on Amazon |
This table covers the Cylinder Head Spacer shims.
2 Cylinder Head Spacer Shim parts for the 1966 Avanti Ii come from 2 brands — MAHLE / CLEVITE and VICTOR REINZ.
This group includes MAHLE / CLEVITE 55138 and VICTOR REINZ 711382900.
Engine Kit Gasket Set
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | FS7733PT2 | 🇺🇸 US | 2-17/32 (In) Inside Diameter Exhaust Pipe Packing Not IncludedOverhaul Set | View on Amazon |
| MAHLE / CLEVITE Popular | 953033 | 🇺🇸 US | Full Gasket Set | View on Amazon |
| APEX | AFS3022 | 🇺🇸 US | View on Amazon | |
| ENGINE PRO | 301000 | 🇺🇸 US | View on Amazon | |
| FEL-PRO | FS7733SH2 | 🇺🇸 US | Overhaul SetRear Main Seal Not Included | View on Amazon |
| MAHLE / CLEVITE | FS1178BJ | 🇺🇸 US | Contains Beaded Steel Cylinder Head GasketFull Gasket Set | View on Amazon |
| VICTOR REINZ | 011004401 | 🇺🇸 US | Multi Layered Steel | View on Amazon |
This table covers full gasket kits covering the joints opened in an engine rebuild. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration.
7 Engine Kit Gasket Set parts for the 1966 Avanti Ii come from 5 brands — FEL-PRO, MAHLE / CLEVITE, APEX and 2 other brands. The "Popular" part is FEL-PRO FS7733PT2.
Part numbers include FEL-PRO FS7733PT2, MAHLE / CLEVITE 953033 and APEX AFS3022, among others listed above.
Harmonic Balancer
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ENGINE PRO Popular | PB2221ST | 🇺🇸 US | High Performance Street Series Damper 6.75" OD | View on Amazon |
| ENGINE PRO Popular | PB1012ST | 🇺🇸 US | High Performance Street Series Damper 6.10" OD | View on Amazon |
| ENGINE PRO | PB1046ST | 🇺🇸 US | High Performance Street Series Damper 8.00" OD | View on Amazon |
| ENGINE PRO | PB2221SS | 🇺🇸 US | SFI Race Series Damper 6.75" Outside Diameter | View on Amazon |
| ENGINE PRO | PB1012SS | 🇺🇸 US | SFI Race Series Damper 6.10" Outside Diameter | View on Amazon |
| ENGINE PRO | PB1046SS | 🇺🇸 US | SFI Race Series Damper 8.00" Outside Diameter | View on Amazon |
This table covers the crankshaft pulleys / harmonic balancers at the front of the engine.
6 Harmonic Balancer parts for the 1966 Avanti Ii come from ENGINE PRO. The "Popular" part is ENGINE PRO PB2221ST.
This group includes ENGINE PRO PB2221ST, ENGINE PRO PB1012ST and ENGINE PRO PB1046ST and the remaining parts above.
Harmonic Balancer Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 4306801 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| ARP | 1342501 | 🇺🇸 US 🇨🇦 CA | 5/8 Socket Head | View on Amazon |
| ARP | 2342501 | 🇺🇸 US 🇨🇦 CA | 13/16 Socket Head | View on Amazon |
This table covers the Harmonic Balancer bolts.
ARP supplies the 3 Harmonic Balancer Bolt parts for the 1966 Avanti Ii.
Listed part numbers: ARP 4306801, ARP 1342501 and ARP 2342501.
Harmonic Balancer Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Popular | 88176 | 🇺🇸 US | Except flange tear line | View on Amazon |
| FEL-PRO | 16202 | 🇺🇸 US | Use with Installation Tool | View on Amazon |
| MAHLE / CLEVITE | A228 | 🇺🇸 US | Nickel Plated Formed Steel | View on Amazon |
| NATIONAL | 5000 | 🇺🇸 US | KitNitrile | View on Amazon |
| VICTOR REINZ | 711347500 | 🇺🇸 US | View on Amazon |
This table covers the wear sleeves used to restore a Harmonic Balancer seal surface.
5 Harmonic Balancer Repair Sleeve parts are listed for the 1966 Avanti Ii, from NATIONAL, FEL-PRO, MAHLE / CLEVITE and 1 other brand. NATIONAL 88176 carries the "Popular" badge.
This group includes NATIONAL 88176, FEL-PRO 16202 and MAHLE / CLEVITE A228 and the remaining parts above.
Intake Manifold Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 1342001 | 🇺🇸 US 🇨🇦 CA | Hex Bolt Head | View on Amazon |
| ARP | 1342101 | 🇺🇸 US 🇨🇦 CA | Black Oxide12 Point Bolt Head | View on Amazon |
| ARP | 4342001 | 🇺🇸 US 🇨🇦 CA | Stainless Steel Hex Bolt Head | View on Amazon |
| ARP | 4342101 | 🇺🇸 US 🇨🇦 CA | Stainless Steel12 Point Bolt Head | View on Amazon |
This table covers the Intake Manifold bolts.
4 Intake Manifold Bolt parts for the 1966 Avanti Ii come from ARP.
Listed part numbers: ARP 1342001, ARP 1342101 and ARP 4342001, plus the other parts above.
Intake Manifold Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| APEX | AMS3220 | 🇺🇸 US | Set | View on Amazon |
| FEL-PRO | MS9617 | 🇺🇸 US | Set | View on Amazon |
| MAHLE / CLEVITE | MS15315 | 🇺🇸 US | CompositeContains One Crossover Restrictor | View on Amazon |
| VICTOR REINZ | 111062601 | 🇺🇸 US | Set | View on Amazon |
This table covers the gaskets between the intake manifold and the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
4 Intake Manifold Gasket parts for the 1966 Avanti Ii come from 4 brands — APEX, FEL-PRO, MAHLE / CLEVITE and 1 other brand.
Part numbers include APEX AMS3220, FEL-PRO MS9617 and MAHLE / CLEVITE MS15315, among others listed above.
Oil Drain Plug Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | 70822 | 🇺🇸 US | 0.500 (in) Inside Diameter x 0.900 (in) Outside DiameterFlat Washer | View on Amazon |
| MAHLE / CLEVITE | 2051 | 🇺🇸 US | Composite | View on Amazon |
| VICTOR REINZ | 711346200 | 🇺🇸 US | 0.500 IN Inside Diameter | View on Amazon |
This table covers the crush washers and gaskets under the oil drain plug. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
3 Oil Drain Plug Gasket parts for the 1966 Avanti Ii come from 3 brands — FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.
Part numbers include FEL-PRO 70822, MAHLE / CLEVITE 2051 and VICTOR REINZ 711346200.
Oil Pan Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP Popular | 2341802 | 🇺🇸 US 🇨🇦 CA | Black OxideHex Bolt Head | View on Amazon |
| ARP | 4341802 | 🇺🇸 US 🇨🇦 CA | With Standard 2 Piece Cork GasketStainless Steel Hex Bolt Head | View on Amazon |
| ARP | 2341901 | 🇺🇸 US 🇨🇦 CA | Stainless SteelHex Bolt Head | View on Amazon |
| ARP | 2341902 | 🇺🇸 US 🇨🇦 CA | 12 Point Bolt Head | View on Amazon |
| ARP | 4341804 | 🇺🇸 US 🇨🇦 CA | With 1 Piece Rubber GasketStainless Steel Hex Bolt Head | View on Amazon |
This table covers the Oil Pan bolts.
ARP supplies the 5 Oil Pan Bolt parts for the 1966 Avanti Ii. ARP 2341802 carries the "Popular" badge.
This group includes ARP 2341802, ARP 4341802 and ARP 2341901 and the remaining parts above.
Oil Pan Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | OS5197C2 | 🇺🇸 US | Cork | View on Amazon |
| FEL-PRO Popular | OS34509T | 🇺🇸 US | PermadryplusIncludes Snaps | View on Amazon |
| APEX | AOP322A | 🇺🇸 US | View on Amazon | |
| FEL-PRO | OS5197C4 | 🇺🇸 US | CorkExhaust Pipe Flange Gasket Included | View on Amazon |
| MAHLE / CLEVITE | OS30568X | 🇺🇸 US | Cork-Rubber | View on Amazon |
| MAHLE / CLEVITE | OS30568XTC | 🇺🇸 US | Cork with Metal Carrier | View on Amazon |
| MAHLE / CLEVITE | OS32458 | 🇺🇸 US | Rubber with Plastic Carrier | View on Amazon |
| VICTOR REINZ | 101017001 | 🇺🇸 US | 18 Bolt PanExcept Exhaust Pipe Packing | View on Amazon |
| VICTOR REINZ | 101010401 | 🇺🇸 US | with Exhaust Pipe Packing | View on Amazon |
| VICTOR REINZ | 101007901 | 🇺🇸 US | Improved Design | View on Amazon |
This table covers the gaskets between the oil pan and the block. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
10 Oil Pan Gasket parts are listed for the 1966 Avanti Ii, from FEL-PRO, MAHLE / CLEVITE, VICTOR REINZ and 1 other brand. FEL-PRO OS5197C2 carries the "Popular" badge.
Oil Pump Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 1347901 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Oil Pump shafts.
One part is listed for the 1966 Avanti Ii — ARP 1347901.
Oil Pump Shaft Guide / Retainer
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | 72665 | 🇺🇸 US | View on Amazon | |
| MAHLE / CLEVITE | H31354 | 🇺🇸 US | NylonRetainer Material: Plastic | View on Amazon |
| VICTOR REINZ | 711403800 | 🇺🇸 US | Distributor to oil pump shaft retainer | View on Amazon |
This table covers the Oil Pump Shaft Guide retainers.
3 Oil Pump Shaft Guide / Retainer parts for the 1966 Avanti Ii come from 3 brands — FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.
Part numbers include FEL-PRO 72665, MAHLE / CLEVITE H31354 and VICTOR REINZ 711403800.
Piston
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SILV-O-LITE | 1423 | 🇺🇸 US | Offset Pin ConfigurationPress Pin Type | View on Amazon |
This table covers the pistons that travel in each cylinder. Typical signs include knock, blow-by, or a cylinder that will not hold compression. Piston work is a short-block job. Match bore, pin and ring pack in the notes — not the photo.
This group shows a single part: SILV-O-LITE 1423.
Piston Ring
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MAHLE / CLEVITE | S40564CP | 🇺🇸 US | PremiumMaterial Carbon Steel / Cast Iron / Stainless Steel | View on Amazon |
| MAHLE / CLEVITE | 40564CP | 🇺🇸 US | PremiumMaterial Carbon Steel / Cast Iron / Stainless Steel | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MAHLE / CLEVITE | S50564CP | 🇺🇸 US | Single Cylinder SetChrome Facing | View on Amazon |
| MAHLE / CLEVITE | 50564CP | 🇺🇸 US | SetChrome Facing | View on Amazon |
This table covers the rings that seal each piston to the cylinder wall.
4 Piston Ring parts for the 1966 Avanti Ii come from MAHLE / CLEVITE.
In the Premium grade, MAHLE / CLEVITE supplies 2 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is MAHLE / CLEVITE S40564CP.
Standard Replacement: 2 parts, from MAHLE / CLEVITE. A representative part number is MAHLE / CLEVITE S50564CP.
Listed part numbers: MAHLE / CLEVITE S40564CP, MAHLE / CLEVITE 40564CP and MAHLE / CLEVITE S50564CP, plus the other parts above.
Rocker Arm Stud
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 1347103 | 🇺🇸 US 🇨🇦 CA | Installed Height 1.770?Adjuster Thread Length 0.670? | View on Amazon |
| ARP | 1347104 | 🇺🇸 US 🇨🇦 CA | 3/8" With Roller Rocker | View on Amazon |
| ARP | 1347101 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| ARP | 2347201 | 🇺🇸 US 🇨🇦 CA | 3/8-7/16" Rocker Arm Stud Kit | View on Amazon |
This table covers the Rocker Arm studs.
ARP supplies the 4 Rocker Arm Stud parts for the 1966 Avanti Ii.
Listed part numbers: ARP 1347103, ARP 1347104 and ARP 1347101, plus the other parts above.
Timing Camshaft Gear Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ARP | 2341001 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Timing Camshaft Gear bolts.
This group shows a single part: ARP 2341001.
Timing Cover Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | TCS51241 | 🇺🇸 US | Repair Sleeve Not Included | View on Amazon |
| MAHLE / CLEVITE Popular | T27781 | 🇺🇸 US | Paper | View on Amazon |
| APEX | ATC3220 | 🇺🇸 US | View on Amazon | |
| FEL-PRO | TCS45165 | 🇺🇸 US | with Sleeve 'N' Seal | View on Amazon |
| MAHLE / CLEVITE | JV779 | 🇺🇸 US | SetContains Extended Case Lip Relocator Timing Cover Seal | View on Amazon |
| MAHLE / CLEVITE | JV779TC | 🇺🇸 US | Contains 1/4in Thick Front End StripsSet | View on Amazon |
| MAHLE / CLEVITE | JV919 | 🇺🇸 US | SetIncludes Repair Sleeve | View on Amazon |
| VICTOR REINZ | 151034001 | 🇺🇸 US | Set | View on Amazon |
| VICTOR REINZ | 151026301 | 🇺🇸 US | SetDoes Not Include RTV | View on Amazon |
This table covers the gaskets that seal the Timing Cover. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
9 Timing Cover Gasket parts are listed for the 1966 Avanti Ii, from MAHLE / CLEVITE, FEL-PRO, VICTOR REINZ and 1 other brand. FEL-PRO TCS51241 carries the "Popular" badge.
This group includes FEL-PRO TCS51241, MAHLE / CLEVITE T27781 and APEX ATC3220 and the remaining parts above.
Timing Cover Repair Sleeve Tool
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | 16312 | 🇺🇸 US | View on Amazon |
This table covers the Timing Cover Repair Sleeve tools. This is a service tool, not a wear part — match the application in the notes.
One part is listed for the 1966 Avanti Ii — FEL-PRO 16312.
Timing Cover Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MAHLE / CLEVITE | 65022 | 🇺🇸 US | Rubber1/2" Wide | View on Amazon |
| MAHLE / CLEVITE | 49328 | 🇺🇸 US | Rubber3/8" Wide | View on Amazon |
| VICTOR REINZ | 191035801 | 🇺🇸 US | View on Amazon |
This table covers the seals at the Timing Cover. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
3 Timing Cover Seal parts are listed for the 1966 Avanti Ii, from MAHLE / CLEVITE and VICTOR REINZ.
This group includes MAHLE / CLEVITE 65022, MAHLE / CLEVITE 49328 and VICTOR REINZ 191035801.
Valve Cover Gasket
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | VS12869T | 🇺🇸 US | Permadryplus | View on Amazon |
| MAHLE / CLEVITE | VS50732 | 🇺🇸 US | SetIncludes Washers | View on Amazon |
| VICTOR REINZ | 151057501 | 🇺🇸 US | SetImproved Design | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | VS12869 | 🇺🇸 US | Cork | View on Amazon |
| FEL-PRO Popular | VS12869R | 🇺🇸 US | Rubber | View on Amazon |
| FEL-PRO Popular | VS12869AC | 🇺🇸 US | Cork | View on Amazon |
| APEX | AVC322 | 🇺🇸 US | 5/32" Thick | View on Amazon |
| APEX | AVC322T | 🇺🇸 US | 7/32" Thick | View on Amazon |
| FEL-PRO | VS50265C | 🇺🇸 US | High Temperature DesignCork | View on Amazon |
| MAHLE / CLEVITE | VS38110 | 🇺🇸 US | Cork-RubberMounting Hole Quantity: 12 | View on Amazon |
| MAHLE / CLEVITE | VS38110R | 🇺🇸 US | SetMolded Rubber | View on Amazon |
| MAHLE / CLEVITE | VS38110TC | 🇺🇸 US | Cork with Metal CarrierMounting Hole Quantity: 8 | View on Amazon |
| ULTRA-POWER | VS12869 | 🇺🇸 US 🇨🇦 CA | Set | View on Amazon |
| VICTOR REINZ | 151058701 | 🇺🇸 US | SetCork | View on Amazon |
| VICTOR REINZ | 151050201 | 🇺🇸 US | SetHigh Temperature Design | View on Amazon |
| VICTOR REINZ | 151050101 | 🇺🇸 US | SetCork | View on Amazon |
This table covers the gaskets that seal the valve cover to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
16 Valve Cover Gasket parts are listed for the 1966 Avanti Ii, from FEL-PRO, MAHLE / CLEVITE, VICTOR REINZ and 2 other brands. FEL-PRO VS12869T carries the "Popular" badge.
The Premium section: 3 options from FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ. FEL-PRO VS12869T is listed in this group.
The Standard Replacement section: 13 options from FEL-PRO, MAHLE / CLEVITE, VICTOR REINZ and 2 other brands. FEL-PRO VS12869 is listed in this group.
Valve Cover Load Spreader
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | ES72676 | 🇺🇸 US | View on Amazon | |
| MAHLE / CLEVITE | GS33825 | 🇺🇸 US | Engine Valve Cover Load Spreader SetSteel | View on Amazon |
| VICTOR REINZ | 181003401 | 🇺🇸 US | View on Amazon |
This table covers the Valve Cover Load spreaders.
3 Valve Cover Load Spreader parts for the 1966 Avanti Ii come from 3 brands — FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.
This group includes FEL-PRO ES72676, MAHLE / CLEVITE GS33825 and VICTOR REINZ 181003401.
Valve Stem Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Popular | SS5112 | 🇺🇸 US | Set | View on Amazon |
| FEL-PRO Popular | SS10058 | 🇺🇸 US | Set | View on Amazon |
| APEX | AVS3022 | 🇺🇸 US | Set | View on Amazon |
| MAHLE / CLEVITE | SS45229 | 🇺🇸 US | SetMolded Rubber | View on Amazon |
| MAHLE / CLEVITE | SS45418 | 🇺🇸 US | FluoroelastomerValve Stem Seal Outside Diameter | View on Amazon |
| MAHLE / CLEVITE | SS45264 | 🇺🇸 US | SetMolded Rubber | View on Amazon |
| VICTOR REINZ | 121001801 | 🇺🇸 US | SetContains 8 Pieces | View on Amazon |
| VICTOR REINZ | 121004001 | 🇺🇸 US | SetContains 16 Pieces | View on Amazon |
This table covers the seals on each valve stem that control oil into the guides. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
8 Valve Stem Seal parts are listed for the 1966 Avanti Ii, from MAHLE / CLEVITE, FEL-PRO, VICTOR REINZ and 1 other brand. FEL-PRO SS5112 carries the "Popular" badge.
Listed part numbers: FEL-PRO SS5112, FEL-PRO SS10058 and APEX AVS3022, plus the other parts above.
Buying Engine Parts for a 1966 Avanti Ii
On this vehicle, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.
- Confirm you have the 5.3L 327cid V8 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Valve Cover Gasket and Crankshaft Seal .
Frequently Asked Questions
How many engine parts fit the 1966 Avanti Ii?
Our catalog currently lists 177 engine parts for the 1966 Avanti Ii across 34 subcategories and 13 brands, covering the 5.3L 327cid V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of engine problems on a 1966 Avanti Ii?
Common symptoms include oil spots under the vehicle, blue or white exhaust smoke, ticking from the valvetrain, or coolant mysteriously disappearing. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1966 Avanti Ii was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1966 Avanti Ii?
Every part on this page is matched to the 5.3L 327cid V8 engine. Then engine hard parts are unforgiving of guesswork — confirm the casting or engine code before ordering, because one model year can hide two different blocks. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1966 Avanti Ii
Engine Parts for Other Avanti Ii Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.