The 1978 Avanti Ii has 12 interior parts with verified fitment on this page — 2 part types and 2 brands, covering the 5.7L 350cid V8 engine. Each part includes a manufacturer part number and application notes.
The interior on the 1978 Avanti Ii covers cabin hardware — seat components, handles, switch bezels, carpet, pedals and the pieces that take daily wear. All 12 listed parts are Dash Board Cover (6 parts) and Speedometer Drive Gear (6 parts).
The 1978 Avanti Ii came with a single engine, the 5.7L 350cid V8, and every part is verified against it.
2 brands supply interior parts for the 1978 Avanti Ii, led by DASH DESIGNS (6 parts) and ATP (6 parts). Quality grades include Suede, Woven and Carpet.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1978 Avanti Ii. 4 parts have it, including DASH DESIGNS 20590C (Dash Board Cover) and ATP YA15 (Speedometer Drive Gear). Each part number opens a page with every vehicle that part fits.
Dash Board Cover
Carpet
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DASH DESIGNS Popular | 20590C | 🇺🇸 US 🇨🇦 CA | Poly Carpet | View on Amazon |
Suede
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DASH DESIGNS | 20590B | 🇺🇸 US 🇨🇦 CA | Brushed Suede | View on Amazon |
| DASH DESIGNS | 20590D | 🇺🇸 US 🇨🇦 CA | Sedona Suede | View on Amazon |
Velour
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DASH DESIGNS Popular | 20590V | 🇺🇸 US 🇨🇦 CA | Plush Velour | View on Amazon |
Woven
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DASH DESIGNS | 20590A | 🇺🇸 US 🇨🇦 CA | Camo | View on Amazon |
| DASH DESIGNS | 20590X | 🇺🇸 US 🇨🇦 CA | Dashtex | View on Amazon |
This table covers the dash covers that sit over the instrument panel.
DASH DESIGNS supplies the 6 Dash Board Cover parts for the 1978 Avanti Ii. DASH DESIGNS 20590C carries the "Popular" badge.
The Carpet section lists 1 option from DASH DESIGNS — grouped under the catalog's "Carpet" designation — the notes column spells out what sets them apart. DASH DESIGNS 20590C is listed in this group.
In the Suede grade, DASH DESIGNS supplies 2 parts: grouped under the catalog's "Suede" designation — the notes column spells out what sets them apart. A representative part number is DASH DESIGNS 20590B.
The Velour section lists 1 option from DASH DESIGNS — grouped under the catalog's "Velour" designation — the notes column spells out what sets them apart. DASH DESIGNS 20590V is listed in this group.
The Woven section lists 2 options from DASH DESIGNS — grouped under the catalog's "Woven" designation — the notes column spells out what sets them apart. DASH DESIGNS 20590A is listed in this group.
Part numbers include DASH DESIGNS 20590C, DASH DESIGNS 20590B and DASH DESIGNS 20590D, among others listed above.
Speedometer Drive Gear
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ATP Popular | YA15 | 🇺🇸 US 🇨🇦 CA | 19 TeethNatural Color | View on Amazon |
| ATP Popular | YA1 | 🇺🇸 US 🇨🇦 CA | Drive Gear Housing with 18-22 Tooth Driven Gear | View on Amazon |
| ATP | YA18 | 🇺🇸 US 🇨🇦 CA | 22 TeethSilver Color | View on Amazon |
| ATP | YA16 | 🇺🇸 US 🇨🇦 CA | 20 TeethBlue Color | View on Amazon |
| ATP | YA17 | 🇺🇸 US 🇨🇦 CA | 21 TeethRed Color | View on Amazon |
| ATP | YA33 | 🇺🇸 US 🇨🇦 CA | Drive Gear Housing with 40-45 Tooth Driven Gear | View on Amazon |
Buying Interior Parts for a 1978 Avanti Ii
On this vehicle, the interior covers cabin hardware — seat components, handles, switch bezels, carpet, pedals and the pieces that take daily wear.
- Confirm you have the 5.7L 350cid 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 retainer clips with any panel removal — they are cheap insurance against squeaks.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Dash Board Cover and Speedometer Drive Gear .
Frequently Asked Questions
How many interior parts fit the 1978 Avanti Ii?
Our catalog currently lists 12 interior parts for the 1978 Avanti Ii across 2 subcategories and 2 brands, covering the 5.7L 350cid V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of interior problems on a 1978 Avanti Ii?
Common symptoms include a door handle that works only from outside, sagging headliner, a window switch that needs two presses, or seat adjusters that stick. 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 retainer clips with any panel removal — they are cheap insurance against squeaks.
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 1978 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 1978 Avanti Ii?
Every part on this page is matched to the 5.7L 350cid V8 engine. Then interior plastics are often color- and trim-specific — check the notes column against your trim level before ordering. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1978 Avanti Ii
Interior 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.