ACDelco R85TS Spark Plug - SOLD EACH
type: Unknown Type
Vendor: CorvairFarmer
Description:
2. Specific Vehicle Fitment Chart
| Make | Model | Year Range | Engine (CID/L) |
|---|---|---|---|
| Chevrolet | Camaro (base/L82/RS) | 1977–1987 | 305 ci (5.0 L) V8 |
| Chevrolet | Camaro Z28/IROC-Z | 1982–1992 | 305; 350 ci (5.0/5.7 L) V8 |
| Chevrolet | Corvette (C3/C4) | 1978–1985 | 350 ci (5.7 L) V8 |
| Chevrolet | C/K Pickup (C10/C20) | 1977–1987 | 305; 350 ci V8 |
| Chevrolet | Caprice/Impala | 1977–1990 | 305; 350 ci V8 |
| Pontiac | Firebird/Base/Formula | 1977–1987 | 301; 305 ci V8 |
| Pontiac | Trans Am | 1979–1992 | 305; 350 ci V8 |
| Buick | Century/Regal/Grand National | 1977–1987 | 231 ci (3.8 L) V6; 301 ci V8 |
| Oldsmobile | Cutlass/Ciera | 1977–1987 | 305; 350 ci V8 |
| GMC | Jimmy/Sierra Pickup | 1977–1987 | 305; 350 ci V8 |
Verify final fitment against your engine’s VIN code or factory service manual.
Cross-Reference Numbers
| Brand | Cross-Reference Part Numbers |
|---|---|
| Accel | 0378 |
| Autolite | 166; 746; 747 |
| Beck Arnley | 176-5178 |
| Bosch | 0242325501; D10B; D9B; DR10BC; DR8BC; DR9B; DR9BC; DR9BPX; WR4-1; 7550; 7551 |
| Champion | 2021; 21; 21CC; 4011; RF11YC; RF11YCT04; RF14YC; RF18YC; 22 |
| Denso | 5008; MA16PR-U; MA16PRU; MA9PR-U; 5006; 5008; 5009; 5010 |
| General Motors | 5613886 |
| Mopar | 4339427 |
| Motorcraft | BRF42; BSF42C; BSF82C; BSF82CF6; 20; 31 |
| NGK | 3122; APR5FS; WR4-1; WR5; 2438 |
| Prestolite | 18RF42; 18RF82 |
| Torch | T5TC |
Table data sourced from
Product Description
ACDelco Gold R85TS (GM 5613886) is the genuine GM-OEM conventional spark plug, engineered for restoration-grade accuracy and dependable daily performance. It features a copper-core center for rapid heat transfer, a nickel-chrome tip for superior corrosion resistance, and a ribbed insulator nose to suppress flash-over. Preset to a 0.035″ gap and built with an integral resistor, R85TS ensures consistent firing in V6 and V8 applications from the late ’70s through early ’90s.
Specifications
| Specification | Detail |
|---|---|
| Manufacturer | ACDelco |
| Part Number | R85TS |
| GM Part Number | 5613886 |
| Thread Size | 14 mm |
| Seat Type | Gasket |
| Reach | 19.05 mm (0.750″) |
| Hex Size | 16 mm (5/8″) |
| Heat Range | 8 |
| Preset Gap | 0.035″ (0.89 mm) |
| Core Material | Copper |
| Center Electrode | Nickel-chrome alloy |
| Resistor | Yes |
| Insulator Nose | Ribbed |
| Warranty | 12 mo/12,000 mi limited |