| Year | Make | Model | Configuration | Positions | Application Notes |
|---|---|---|---|---|---|
| << < 48 49 50 51 52 53 54 55 56 57 > >> | |||||
| 1981 | Chevrolet | Impala | V8 267 4.4L; VIN J | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Impala | V8 305 5.0L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Impala | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K10 | L6 250 4.1L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K10 | V8 305 5.0L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K10 | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K10 Suburban | V8 305 5.0L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K10 Suburban | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K20 | L6 292 4.8L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K20 | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K20 Suburban | L6 292 4.8L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K20 Suburban | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K30 | L6 292 4.8L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K30 | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K30 | V8 454 7.4L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K5 Blazer | L6 250 4.1L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K5 Blazer | V8 305 5.0L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | K5 Blazer | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Malibu | V6 229 3.8L; VIN K | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Malibu | V6 231 3.8L (3800cc) | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Malibu | V8 267 4.4L; VIN J | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Malibu | V8 305 5.0L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Malibu | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Monte Carlo | V6 229 3.8L; VIN K | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Monte Carlo | V6 231 3.8L (3800cc) | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Monte Carlo | V8 267 4.4L; VIN J | 14 mm Tapered Seat | |
| 1981 | Chevrolet | Monte Carlo | V8 305 5.0L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | P20 | L6 292 4.8L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | P20 | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | P30 | L6 292 4.8L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | P30 | V8 350 5.7L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | P30 | V8 454 7.4L | 14 mm Tapered Seat | |
| 1981 | Chevrolet | P40 | L6 292 4.8L | 14 mm Tapered Seat | |
| 1981 | Chrysler | Cordoba | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Chrysler | LeBaron | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Chrysler | Newport | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Chrysler | Town and Country | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Dodge | B150 | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Dodge | B250 | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Dodge | D150 | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Dodge | D250 | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Dodge | Diplomat | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Dodge | Mirada | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Dodge | St. Regis | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Dodge | W150 | L6 225 3.7L (3687cc) | 14 mm Tapered Seat | |
| 1981 | Ford | Bronco | V8 302 5.0L | 14 mm Tapered Seat | |
| 1981 | Ford | Bronco | V8 351 5.8L (5753cc) | 14 mm Tapered Seat | |
| 1981 | Ford | E-100 Econoline | V8 302 5.0L | 14 mm Tapered Seat | |
| 1981 | Ford | E-100 Econoline | V8 351 5.8L (5753cc) | 14 mm Tapered Seat | |
| 1981 | Ford | E-100 Econoline Club Wagon | V8 302 5.0L | 14 mm Tapered Seat | |