51 Ignition parts are listed for the 1975 Triumph TR7, in 7 part types, covering the 2.0L L4 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1975 Triumph TR7, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. 43 parts of the 51 listed are Spark Plug (24 parts), Ignition Coil (10 parts) and Spark Plug Wire (9 parts). The other 4 part types cover the remaining 8 parts.
Every part on this page is matched to the 2.0L L4 — the only engine offered in the 1975 Triumph TR7.
The most listed brands for 1975 Triumph TR7 ignition parts are STANDARD MOTOR PRODUCTS (10 parts), NGK (8 parts) and DENSO (7 parts), plus 13 more brands. Quality grades include Copper / Nickel, Standard Replacement and Economy.
9 parts on this 1975 Triumph TR7 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including STANDARD MOTOR PRODUCTS UC15T (Ignition Coil) and ACDELCO R44XLS (Spark Plug). Click any part number to see every vehicle that part fits.
Distributor Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | LU430 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 5D1042 | 🇺🇸 US 🇨🇦 CA | with California Emissions Systemwith Electronic Ignition | View on Amazon |
This table covers the Distributor caps. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable.
2 Distributor Cap parts for the 1975 Triumph TR7 come from 2 brands — STANDARD MOTOR PRODUCTS and WELLS.
This group includes STANDARD MOTOR PRODUCTS LU430 and WELLS 5D1042.
Distributor Rotor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | LU324 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 4R1189 | 🇺🇸 US 🇨🇦 CA | with California Emissions Systemwith Electronic Ignition | View on Amazon |
This table covers the Distributor rotors. Typical signs include shudder under braking, or a lip at the outer edge. Do not put new pads on a rotor that is below minimum thickness.
2 Distributor Rotor parts for the 1975 Triumph TR7 come from 2 brands — STANDARD MOTOR PRODUCTS and WELLS.
Listed part numbers: STANDARD MOTOR PRODUCTS LU324 and WELLS 4R1189.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | UC15T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
| FVP | UC15F | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| HOLSTEIN | 2IGC0058 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| SKP | SKUC15T | 🇺🇸 US 🇨🇦 CA | Fits Coil Packor without External Resistor | View on Amazon |
| SPECTRA PREMIUM | C622 | 🇺🇸 US 🇨🇦 CA | PackInternal Resistor Coil | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | UC15 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| BECK/ARNLEY | 1788074 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| UNITED MOTOR PRODUCTS | C15 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WALKER PRODUCTS | 9201041 | 🇺🇸 US 🇨🇦 CA | Single Coil | View on Amazon |
| WELLS | 5C1057 | 🇺🇸 US 🇨🇦 CA | Requires External Resistor: YES | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
10 Ignition Coil parts are listed for the 1975 Triumph TR7, from STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 6 other brands. STANDARD MOTOR PRODUCTS UC15T carries the "Popular" badge.
In the Economy grade, STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 2 other brands supply 5 parts: the catalog's value-priced group. A representative part number is STANDARD MOTOR PRODUCTS UC15T.
The Standard Replacement section lists 5 options from STANDARD MOTOR PRODUCTS, BECK/ARNLEY, UNITED MOTOR PRODUCTS and 2 other brands — built to original-equipment specification. STANDARD MOTOR PRODUCTS UC15 is listed in this group.
Ignition Conversion Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | LX806 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 1A4179 | 🇺🇸 US 🇨🇦 CA | Delco Distributor # D204, D200, Distributor marked "made in England"12 Volt | View on Amazon |
| WELLS | 1A4084 | 🇺🇸 US 🇨🇦 CA | Lucas Distributor # 47DM4, Factory Electronic Ignition, Except Distributor # 41812A12 Volt | View on Amazon |
This table covers the Ignition Conversion kits.
3 Ignition Conversion Kit parts for the 1975 Triumph TR7 come from 2 brands — WELLS and STANDARD MOTOR PRODUCTS.
Part numbers include STANDARD MOTOR PRODUCTS LX806, WELLS 1A4179 and WELLS 1A4084.
Spark Plug
Summary: Notes include pre-set gaps of 0.024", 0.025", 0.031", 0.032", 0.033", 0.035", 0.036", 0.039", 0.040" and 0.044". Replacement brands in this table include NGK, DENSO and CHAMPION.
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | R44XLS | 🇺🇸 US 🇨🇦 CA | ProfessionalConventional | View on Amazon |
| CHAMPION Popular | 404 | 🇺🇸 US 🇨🇦 CA | Copper PlusPre-Set Gap: 0.035" | View on Amazon |
| DENSO Popular | 3031 | 🇺🇸 US 🇨🇦 CA | U-Groove ConventionalPre-Set Gap: 0.032" | View on Amazon |
| NGK Popular | 7734 | 🇺🇸 US 🇨🇦 CA | StandardPart Number: BPR5ES | View on Amazon |
| BOSCH | 7905 | 🇺🇸 US 🇨🇦 CA | NickelPre-Set Gap: 0.031" | View on Amazon |
| CHAMPION | 38 | 🇺🇸 US 🇨🇦 CA | Copper PlusPre-Set Gap: 0.032" | View on Amazon |
| CHAMPION | 4041 | 🇺🇸 US 🇨🇦 CA | Copper PlusClassification: Champion Copper Plus | View on Amazon |
| DENSO | 3027 | 🇺🇸 US 🇨🇦 CA | Pre-Set Gap: 0.032" | View on Amazon |
| MOTORCRAFT | SP416A | 🇺🇸 US 🇨🇦 CA | Copper | View on Amazon |
| MOTORCRAFT | SP416X | 🇺🇸 US 🇨🇦 CA | Copper | View on Amazon |
| NGK | 7327 | 🇺🇸 US 🇨🇦 CA | V-Power PlugPre-Set Gap: 0.036" | View on Amazon |
| NGK | 1233 | 🇺🇸 US 🇨🇦 CA | V-PowerPre-Set Gap: 0.032" | View on Amazon |
| NGK | 4006 | 🇺🇸 US 🇨🇦 CA | StandardPart Number: BPR5ES Solid | View on Amazon |
Double Platinum (lasts up to 3x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 41828 | 🇺🇸 US 🇨🇦 CA | ProfessionalDouble Platinum | View on Amazon |
| CHAMPION | 7322 | 🇺🇸 US 🇨🇦 CA | Double Platinum PowerPre-Set Gap: 0.032" | View on Amazon |
| DENSO | 3004 | 🇺🇸 US 🇨🇦 CA | Double PlatinumPre-Set Gap: 0.044" | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DENSO | 5305 | 🇺🇸 US 🇨🇦 CA | Iridium PowerHex Size: 20.6 mm | View on Amazon |
| DENSO | 4708 | 🇺🇸 US 🇨🇦 CA | Iridium TTHex Size: 20.6 mm | View on Amazon |
| NGK | 6597 | 🇺🇸 US 🇨🇦 CA | Iridium IXPre-Set Gap: 0.032" | View on Amazon |
| NGK | 95525 | 🇺🇸 US 🇨🇦 CA | Iridium IX | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular | 7082 | 🇺🇸 US 🇨🇦 CA | G-PowerPre-Set Gap: 0.040" | View on Amazon |
| CHAMPION | 3405 | 🇺🇸 US 🇨🇦 CA | Platinum PowerPlug Type: RN14PMC | View on Amazon |
| DENSO | 4501 | 🇺🇸 US 🇨🇦 CA | Platinum TTTerminal Cap is Non-Removable | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 44XLS | 🇺🇸 US 🇨🇦 CA | Non Resistor | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
24 Spark Plug parts for the 1975 Triumph TR7 come from 6 brands — NGK, DENSO, CHAMPION and 3 other brands. The "Popular" part is ACDELCO R44XLS.
The Copper / Nickel section lists 13 options from NGK, CHAMPION, DENSO and 3 other brands — grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. ACDELCO R44XLS is listed in this group.
The Double Platinum (lasts up to 3x longer than Copper / Nickel) section lists 3 options from ACDELCO, CHAMPION and DENSO — grouped under the catalog's "Double Platinum (lasts up to 3x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. ACDELCO 41828 is listed in this group.
In the Iridium (lasts up to 4x longer than Copper / Nickel) grade, DENSO and NGK supply 4 parts: grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is DENSO 5305.
The Platinum (lasts up to 2x longer than Copper / Nickel) section lists 3 options from NGK, CHAMPION and DENSO — grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. NGK 7082 is listed in this group.
1 further part sits outside the graded sections, with the same engine-level match.
Spark Plug Non-Fouler
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 42004 | 🇺🇸 US 🇨🇦 CA | 14mm Gasket Seat Long Reach | View on Amazon |
This table covers the non-foulers that space a spark plug away from oil fouling.
One part is listed for the 1975 Triumph TR7 — DORMAN 42004.
Spark Plug Wire
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular | 52408 | 🇺🇸 US 🇨🇦 CA | Set | View on Amazon |
| DENSO | 6714016 | 🇺🇸 US 🇨🇦 CA | Spark Plug Wire Set7mm | View on Amazon |
| STANDARD MOTOR PRODUCTS | 55430 | 🇺🇸 US 🇨🇦 CA | IntermotorSet | View on Amazon |
| STANDARD MOTOR PRODUCTS | 55109 | 🇺🇸 US 🇨🇦 CA | IntermotorSet | View on Amazon |
| UNITED MOTOR PRODUCTS | 7401 | 🇺🇸 US 🇨🇦 CA | United-PackardSet | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | 27478 | 🇺🇸 US 🇨🇦 CA | Pro SeriesSet | View on Amazon |
| STANDARD MOTOR PRODUCTS | 27419 | 🇺🇸 US 🇨🇦 CA | Pro SeriesSet | View on Amazon |
| STANDARD MOTOR PRODUCTS | 29483 | 🇺🇸 US 🇨🇦 CA | Pro SeriesSet | View on Amazon |
| WALKER PRODUCTS | 9241038 | 🇺🇸 US 🇨🇦 CA | Direct FitSet | View on Amazon |
This table covers the Spark Plug wires.
9 Spark Plug Wire parts are listed for the 1975 Triumph TR7, from STANDARD MOTOR PRODUCTS, NGK, DENSO and 2 other brands. NGK 52408 carries the "Popular" badge.
The Premium section lists 5 options from STANDARD MOTOR PRODUCTS, NGK, DENSO and 1 other brand — a step above OE specification in materials, tolerances or warranty terms. NGK 52408 is listed in this group.
The Standard Replacement section: 4 options from STANDARD MOTOR PRODUCTS and WALKER PRODUCTS. STANDARD MOTOR PRODUCTS 27478 is listed in this group.
Listed part numbers: NGK 52408, DENSO 6714016 and STANDARD MOTOR PRODUCTS 55430, plus the other parts above.
Buying Ignition Parts for a 1975 Triumph TR7
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Confirm you have the 2.0L L4 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 plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Spark Plug and Ignition Coil .
Frequently Asked Questions
How many ignition parts fit the 1975 Triumph TR7?
Our catalog currently lists 51 ignition parts for the 1975 Triumph TR7 across 7 subcategories and 16 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of ignition problems on a 1975 Triumph TR7?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 1975 Triumph TR7?
Notes on this page include pre-set gaps of 0.024", 0.025", 0.031", 0.032", 0.033", 0.035", 0.036", 0.039", 0.040" and 0.044". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
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 1975 Triumph TR7 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 1975 Triumph TR7?
Every part on this page is matched to the 2.0L L4 engine. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1975 Triumph TR7
Ignition Parts for Other Triumph TR7 Years
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