The 1957 Riley 2.6 has 19 ignition parts with verified fitment on this page — 3 part types and 10 brands, covering the 2.6L L6 engine. Each part includes a manufacturer part number and application notes.
On the 1957 Riley 2.6, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. All 19 listed parts are Spark Plug (9 parts), Ignition Coil (8 parts) and Ignition Conversion Kit (2 parts).
The 1957 Riley 2.6 came with a single engine, the 2.6L L6, and every part is verified against it.
10 brands supply ignition parts for the 1957 Riley 2.6, led by CHAMPION (5 parts), WELLS (3 parts) and STANDARD MOTOR PRODUCTS (2 parts), plus 7 more brands. Quality grades include Copper / Nickel, Economy and Standard Replacement.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1957 Riley 2.6. 4 parts have it, including STANDARD MOTOR PRODUCTS UC15T (Ignition Coil) and ACDELCO R44XLS (Spark Plug). Each part number opens a page with every vehicle that part fits.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | UC15T | 🇺🇸 US | T-Series | View on Amazon |
| FVP | UC15F | 🇺🇸 US | View on Amazon | |
| HOLSTEIN | 2IGC0058 | 🇺🇸 US | View on Amazon | |
| SKP | SKUC15T | 🇺🇸 US | Coil Pack | View on Amazon |
| SPECTRA PREMIUM | C622 | 🇺🇸 US | Pack | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | UC15 | 🇺🇸 US | View on Amazon | |
| UNITED MOTOR PRODUCTS | C15 | 🇺🇸 US | View on Amazon | |
| WELLS | 5C1019 | 🇺🇸 US | Used on most import products with 12 Volt system with Internal resistorUniversal 12 Volt Coil | 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.
8 Ignition Coil parts for the 1957 Riley 2.6 come from 7 brands — STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 4 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS UC15T.
The Economy section lists 5 options from STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 2 other brands — the catalog's value-priced group. STANDARD MOTOR PRODUCTS UC15T is listed in this group.
In the Standard Replacement grade, STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS and WELLS supply 3 parts: built to original-equipment specification. A representative part number is STANDARD MOTOR PRODUCTS UC15.
Listed part numbers: STANDARD MOTOR PRODUCTS UC15T, FVP UC15F and HOLSTEIN 2IGC0058, plus the other parts above.
Ignition Conversion Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1A4155 | 🇺🇸 US | with Lucas Distributor # DM6A12 Volt | View on Amazon |
| WELLS | 1A4228 | 🇺🇸 US | with Lucas Distributor # DM6A12 Volt | View on Amazon |
This table covers the Ignition Conversion kits.
WELLS supplies both parts for the 1957 Riley 2.6.
Part numbers include WELLS 1A4155 and WELLS 1A4228.
Spark Plug
Summary: Notes include pre-set gaps of 0.025", 0.032", 0.033", 0.035" and 0.039". Replacement brands in this table include CHAMPION, ACDELCO and MOTORCRAFT.
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | R44XLS | 🇺🇸 US 🇨🇦 CA | ProfessionalConventional | View on Amazon |
| CHAMPION Popular | 404 | 🇺🇸 US | Copper PlusPre-Set Gap: 0.035" | View on Amazon |
| CHAMPION | 38 | 🇺🇸 US | Copper PlusPre-Set Gap: 0.032" | View on Amazon |
| CHAMPION | 4041 | 🇺🇸 US | Copper PlusClassification: Champion Copper Plus | View on Amazon |
| MOTORCRAFT | SP416A | 🇺🇸 US | Copper | View on Amazon |
| MOTORCRAFT | SP416X | 🇺🇸 US | Copper | 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 | Double Platinum PowerPre-Set Gap: 0.032" | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CHAMPION | 3405 | 🇺🇸 US | Platinum PowerPlug Type: RN14PMC | 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.
9 Spark Plug parts are listed for the 1957 Riley 2.6, from CHAMPION, ACDELCO and MOTORCRAFT. ACDELCO R44XLS carries the "Popular" badge.
In the Copper / Nickel grade, CHAMPION, MOTORCRAFT and ACDELCO supply 6 parts: grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO R44XLS.
In the Double Platinum (lasts up to 3x longer than Copper / Nickel) grade, ACDELCO and CHAMPION supply 2 parts: 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. A representative part number is ACDELCO 41828.
In the Platinum (lasts up to 2x longer than Copper / Nickel) grade, CHAMPION supplies 1 part: grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is CHAMPION 3405.
Listed part numbers: ACDELCO R44XLS, CHAMPION 404 and CHAMPION 38, plus the other parts above.
Buying Ignition Parts for a 1957 Riley 2.6
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Confirm you have the 2.6L L6 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 1957 Riley 2.6?
Our catalog currently lists 19 ignition parts for the 1957 Riley 2.6 across 3 subcategories and 10 brands, covering the 2.6L L6 engine. Each part is matched to the engine(s) it fits.
What are the signs of ignition problems on a 1957 Riley 2.6?
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 1957 Riley 2.6?
Notes on this page include pre-set gaps of 0.025", 0.032", 0.033", 0.035" and 0.039". 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 1957 Riley 2.6 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 1957 Riley 2.6?
Every part on this page is matched to the 2.6L L6 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 1957 Riley 2.6
Ignition Parts for Other Riley 2.6 Years
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