COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. This 503 seal has a .630" outer diameter and fits applications with 11/32" valves and .530" OD valve guides.
This Part Fits:
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1980-1981 | Buick | Century | Base |
| 1982-1989 | Buick | Century | Custom |
| 1980-1981,1984 | Buick | Century | Estate |
| 1985-1989 | Buick | Century | Estate Wagon |
| 1980-1989 | Buick | Century | Limited |
| 1984 | Buick | Century | Olympia Limited |
| 1980-1981 | Buick | Century | Sport |
| 1980-1987 | Buick | Electra | Estate Wagon |
| 1980-1984 | Buick | Electra | Limited |
| 1980-1984 | Buick | Electra | Park Avenue |
| 1980-1983 | Buick | Estate Wagon | Base |
| 1980-1981 | Buick | LeSabre | Base |
| 1985 | Buick | LeSabre | Collector's Edition |
| 1982-1985 | Buick | LeSabre | Custom |
| 1985-1990 | Buick | LeSabre | Estate Wagon |
| 1980-1985 | Buick | LeSabre | Limited |
| 1982 | Buick | LeSabre | Limited Edition F/E |
| 1981 | Buick | LeSabre | Sport |
| 1980-1981,1986-1987 | Buick | Regal | Base |
| 1980-1981,1986-1987 | Buick | Regal | Limited |
| 1980-1985 | Buick | Riviera | Base |
| 1982 | Buick | Riviera | Limited Edition |
| 1983-1985 | Buick | Riviera | Luxury |
| 1980 | Buick | Riviera | S |
| 1981 | Buick | Riviera | T-Type |
| 1983 | Buick | Riviera | XX Anniversary Edition |
| 1980-1982 | Buick | Skylark | Base |
| 1983-1989 | Buick | Skylark | Custom |
| 1980-1989 | Buick | Skylark | Limited |
| 1980-1982 | Buick | Skylark | Sport |
| 1986-1987 | Buick | Somerset | Custom |
| 1986-1987 | Buick | Somerset | Limited |
| 1986 | Buick | Somerset | T-Type |
| 1985 | Buick | Somerset Regal | Base |
| 1985 | Buick | Somerset Regal | Limited |
| 1987-1990 | Cadillac | Brougham | Base |
| 1987-1990 | Cadillac | Brougham | d'Elegance |
| 1986 | Cadillac | Fleetwood | Brougham |
| 1986 | Cadillac | Fleetwood | Brougham d'Elegance |
| 1985-1989 | Chevrolet | Astro | Base |
| 1985-1989 | Chevrolet | Astro | CL |
| 1985-1989 | Chevrolet | Astro | CS |
| 1987-1989 | Chevrolet | Astro | LT |
| 1994 | Chevrolet | Blazer | Base |
| 1992-1993 | Chevrolet | Blazer | Cheyenne |
| 1987 | Chevrolet | Blazer | Custom Deluxe |
| 1988-1991 | Chevrolet | Blazer | Scottsdale |
| 1987-1994 | Chevrolet | Blazer | Silverado |
| 1994 | Chevrolet | Blazer | Silverado Sport |
| 1994-1995 | Chevrolet | C1500 | Base |
| 1988-1995 | Chevrolet | C1500 | Cheyenne |
| 1988-1992 | Chevrolet | C1500 | Scottsdale |
| 1988-1995 | Chevrolet | C1500 | Silverado |
| 1990-1995 | Chevrolet | C1500 | WT |
| 1992-1995 | Chevrolet | C1500 Suburban | Base |
| 1995 | Chevrolet | C1500 Suburban | LS |
| 1995 | Chevrolet | C1500 Suburban | LT |
| 1992-1994 | Chevrolet | C1500 Suburban | Silverado |
| 1994-1995 | Chevrolet | C2500 | Base |
| 1988-1995 | Chevrolet | C2500 | Cheyenne |
| 1988-1992 | Chevrolet | C2500 | Scottsdale |
| 1988-1995 | Chevrolet | C2500 | Silverado |
| 1994-1995 | Chevrolet | C2500 | WT |
| 1992-1995 | Chevrolet | C2500 Suburban | Base |
| 1995 | Chevrolet | C2500 Suburban | LS |
| 1995 | Chevrolet | C2500 Suburban | LT |
| 1992-1994 | Chevrolet | C2500 Suburban | Silverado |
| 1994-1995 | Chevrolet | C3500 | Base |
| 1988-1995 | Chevrolet | C3500 | Cheyenne |
| 1988-1992 | Chevrolet | C3500 | Scottsdale |
| 1988-1995 | Chevrolet | C3500 | Silverado |
| 1988 | Chevrolet | Camaro | Base |
| 1987-1990 | Chevrolet | Camaro | Iroc-Z |
| 1987 | Chevrolet | Camaro | LT |
| 1989-1992 | Chevrolet | Camaro | RS |
| 1992 | Chevrolet | Camaro | RS Heritage Edition |
| 1982-1987 | Chevrolet | Camaro | Sport |
| 1987,1991-1992 | Chevrolet | Camaro | Z28 |
| 1992 | Chevrolet | Camaro | Z28 Heritage Edition |
| 1987-1992 | Chevrolet | Caprice | Base |
| 1986-1993 | Chevrolet | Caprice | Classic |
| 1986-1990 | Chevrolet | Caprice | Classic Brougham |
| 1993 | Chevrolet | Caprice | Classic LS |
| 1987-1990 | Chevrolet | Caprice | Classic LS Brougham |
| 1991-1993 | Chevrolet | Caprice | Classic LTZ |
| 1982-1989 | Chevrolet | Celebrity | Base |
| 1982-1983,1989 | Chevrolet | Celebrity | CL |
| 1985 | Chevrolet | Celebrity | Classic |
| 1982 | Chevrolet | Celebrity | CS |
| 1985-1987 | Chevrolet | Celebrity | Estate |
| 1984-1989 | Chevrolet | Celebrity | Eurosport |
| 1980-1983 | Chevrolet | Citation | Base |
| 1980 | Chevrolet | Citation | Club |
| 1980 | Chevrolet | Citation | Custom |
| 1980-1983 | Chevrolet | Citation | X-11 |
| 1984-1985 | Chevrolet | Citation II | Base |
| 1984-1985 | Chevrolet | Citation II | X-11 |
| 1988 | Chevrolet | Corvette | 35th Anniversary Edition |
| 1987-1991 | Chevrolet | Corvette | Base |
| 1987 | Chevrolet | El Camino | Base |
| 1987 | Chevrolet | El Camino | SS |
| 1987-1995 | Chevrolet | G10 | Beauville |
| 1987 | Chevrolet | G10 | Bonaventure |
| 1987-1995 | Chevrolet | G10 | Chevy Van |
| 1987-1995 | Chevrolet | G10 | Sportvan |
| 1987-1995 | Chevrolet | G20 | Beauville |
| 1987-1995 | Chevrolet | G20 | Chevy Van |
| 1987-1995 | Chevrolet | G20 | Sportvan |
| 1987-1996 | Chevrolet | G30 | Beauville |
| 1987-1996 | Chevrolet | G30 | Chevy Van |
| 1987-1996 | Chevrolet | G30 | Hi-Cube |
| 1987-1996 | Chevrolet | G30 | Sportvan |
| 1994-1995 | Chevrolet | K1500 | Base |
| 1988-1995 | Chevrolet | K1500 | Cheyenne |
| 1988-1992 | Chevrolet | K1500 | Scottsdale |
| 1988-1995 | Chevrolet | K1500 | Silverado |
| 1991 | Chevrolet | K1500 | Sport |
| 1990-1995 | Chevrolet | K1500 | WT |
| 1992-1995 | Chevrolet | K1500 Suburban | Base |
| 1995 | Chevrolet | K1500 Suburban | LS |
| 1995 | Chevrolet | K1500 Suburban | LT |
| 1992-1994 | Chevrolet | K1500 Suburban | Silverado |
| 1994-1995 | Chevrolet | K2500 | Base |
| 1988-1995 | Chevrolet | K2500 | Cheyenne |
| 1988-1992 | Chevrolet | K2500 | Scottsdale |
| 1988-1995 | Chevrolet | K2500 | Silverado |
| 1994-1995 | Chevrolet | K2500 | WT |
| 1992-1995 | Chevrolet | K2500 Suburban | Base |
| 1995 | Chevrolet | K2500 Suburban | LS |
| 1995 | Chevrolet | K2500 Suburban | LT |
| 1992-1994 | Chevrolet | K2500 Suburban | Silverado |
| 1994-1995 | Chevrolet | K3500 | Base |
| 1988-1995 | Chevrolet | K3500 | Cheyenne |
| 1988-1992 | Chevrolet | K3500 | Scottsdale |
| 1988-1995 | Chevrolet | K3500 | Silverado |
| 1987-1989 | Chevrolet | LLV | Base |
| 1987-1988 | Chevrolet | Monte Carlo | Base |
| 1987-1988 | Chevrolet | Monte Carlo | LS |
| 1987-1988 | Chevrolet | Monte Carlo | SS |
| 1980 | Chevrolet | Monza | 2+2 |
| 1980 | Chevrolet | Monza | 2+2 Sport |
| 1980 | Chevrolet | Monza | 2+2 Spyder |
| 1980 | Chevrolet | Monza | Base |
| 1980 | Chevrolet | Monza | Spyder |
| 1987 | Chevrolet | R10 | Custom Deluxe |
| 1987 | Chevrolet | R10 | Scottsdale |
| 1987 | Chevrolet | R10 | Silverado |
| 1987 | Chevrolet | R10 Suburban | Custom Deluxe |
| 1987-1988 | Chevrolet | R10 Suburban | Scottsdale |
| 1987-1988 | Chevrolet | R10 Suburban | Silverado |
| 1989-1991 | Chevrolet | R1500 Suburban | Scottsdale |
| 1989-1991 | Chevrolet | R1500 Suburban | Silverado |
| 1988 | Chevrolet | R20 | Cheyenne |
| 1987-1988 | Chevrolet | R20 | Custom Deluxe |
| 1987-1988 | Chevrolet | R20 | Scottsdale |
| 1987-1988 | Chevrolet | R20 | Silverado |
| 1987 | Chevrolet | R20 Suburban | Custom Deluxe |
| 1987-1988 | Chevrolet | R20 Suburban | Scottsdale |
| 1987-1988 | Chevrolet | R20 Suburban | Silverado |
| 1989-1991 | Chevrolet | R2500 Suburban | Scottsdale |
| 1989-1991 | Chevrolet | R2500 Suburban | Silverado |
| 1988 | Chevrolet | R30 | Cheyenne |
| 1987-1988 | Chevrolet | R30 | Custom Deluxe |
| 1987-1988 | Chevrolet | R30 | Scottsdale |
| 1987-1988 | Chevrolet | R30 | Silverado |
| 1989-1991 | Chevrolet | R3500 | Cheyenne |
| 1989-1990 | Chevrolet | R3500 | Scottsdale |
| 1989-1991 | Chevrolet | R3500 | Silverado |
| 1985-1989 | Chevrolet | S10 | Base |
| 1985-1989 | Chevrolet | S10 | Durango |
| 1985-1989 | Chevrolet | S10 | Sport |
| 1985-1989 | Chevrolet | S10 | Tahoe |
| 1985-1988 | Chevrolet | S10 Blazer | Base |
| 1987-1988 | Chevrolet | S10 Blazer | High Country |
| 1985-1988 | Chevrolet | S10 Blazer | Sport |
| 1985-1988 | Chevrolet | S10 Blazer | Tahoe |
| 1995 | Chevrolet | Tahoe | Base |
| 1995 | Chevrolet | Tahoe | LS |
| 1995 | Chevrolet | Tahoe | LT |
| 1987 | Chevrolet | V10 | Custom Deluxe |
| 1987 | Chevrolet | V10 | Scottsdale |
| 1987 | Chevrolet | V10 | Silverado |
| 1987 | Chevrolet | V10 Suburban | Custom Deluxe |
| 1987-1988 | Chevrolet | V10 Suburban | Scottsdale |
| 1987-1988 | Chevrolet | V10 Suburban | Silverado |
| 1989-1991 | Chevrolet | V1500 Suburban | Scottsdale |
| 1989-1991 | Chevrolet | V1500 Suburban | Silverado |
| 1987 | Chevrolet | V20 | Custom Deluxe |
| 1987 | Chevrolet | V20 | Scottsdale |
| 1987 | Chevrolet | V20 | Silverado |
| 1987 | Chevrolet | V20 Suburban | Custom Deluxe |
| 1987-1988 | Chevrolet | V20 Suburban | Scottsdale |
| 1987-1988 | Chevrolet | V20 Suburban | Silverado |
| 1989-1991 | Chevrolet | V2500 Suburban | Scottsdale |
| 1989-1991 | Chevrolet | V2500 Suburban | Silverado |
| 1988 | Chevrolet | V30 | Cheyenne |
| 1987-1988 | Chevrolet | V30 | Custom Deluxe |
| 1987-1988 | Chevrolet | V30 | Scottsdale |
| 1987-1988 | Chevrolet | V30 | Silverado |
| 1989-1991 | Chevrolet | V3500 | Cheyenne |
- 1980-pontiac-firebird-formula-esi5341435
- 1980-pontiac-firebird-trans-am-esi1528112
- 1981-pontiac-firebird-formula-esi1538315
- 1981-pontiac-firebird-trans-am-esi8502957
- 1987-chevrolet-blazer-custom-deluxe-esi5728522
- 1987-chevrolet-blazer-silverado-esi4870409
- 1987-chevrolet-corvette-base-esi2053079
- 1987-chevrolet-el-camino-base-esi5890560
- 1987-chevrolet-monte-carlo-base-esi9374318
- 1987-chevrolet-monte-carlo-ss-esi4124778
- 1988-chevrolet-blazer-scottsdale-esi4540759
- 1988-chevrolet-blazer-silverado-esi5041609
- 1988-chevrolet-monte-carlo-base-esi7050074
- 1988-chevrolet-monte-carlo-ls-esi9333480
- 1988-chevrolet-monte-carlo-ss-esi2420779
- Bucket:Chevy
- Bucket:Ford
- Engine Components>Valve Seals
- EPA:N/A
- LTL:N
- MPN:503-1
- Non-CARB:N
- Prop65:Y
- SpecialOrder:Y