Lease for as low as $/week
COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. These 503 seals have a .630" outer diameter and fit applications with 11/32" valves and .530" OD valve guides.
User 1
Catalog
Warranty
Catalog
This Part Fits:
User 1
Catalog
Warranty
Catalog
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1986-1987 | Buick | Regal | Base |
| 1987 | Buick | Regal | GNX |
| 1986-1987 | Buick | Regal | Grand National |
| 1986-1987 | Buick | Regal | Limited |
| 1986 | Buick | Regal | T-Type |
| 1987-2000 | Chevrolet | Astro | Base |
| 1987-1995 | Chevrolet | Astro | CL |
| 1987-1995 | Chevrolet | Astro | CS |
| 1996-2000 | Chevrolet | Astro | LS |
| 1987-2000 | Chevrolet | Astro | LT |
| 1963-1973 | Chevrolet | Bel Air | Base |
| 1963-1972 | Chevrolet | Biscayne | Base |
| 1969-1974,1995-1999 | Chevrolet | Blazer | Base |
| 1996-2003 | Chevrolet | Blazer | LS |
| 1995-2001 | Chevrolet | Blazer | LT |
| 1999-2001 | Chevrolet | Blazer | Trailblazer |
| 2001-2003 | Chevrolet | Blazer | Xtreme |
| 2003 | Chevrolet | Blazer | ZR2 |
| 1969 | Chevrolet | Brookwood | Base |
| 1968-1974 | Chevrolet | C10 Suburban | Base |
| 1975-1980 | Chevrolet | C10 Suburban | Custom Deluxe |
| 1975-1980 | Chevrolet | C10 Suburban | Scottsdale |
| 1975-1980 | Chevrolet | C10 Suburban | Silverado |
| 1994-1997 | Chevrolet | C1500 | Base |
| 1988-1998 | Chevrolet | C1500 | Cheyenne |
| 1988-1992 | Chevrolet | C1500 | Scottsdale |
| 1988-1998 | Chevrolet | C1500 | Silverado |
| 1990-1998 | Chevrolet | C1500 | WT |
| 1968-1974 | Chevrolet | C20 Suburban | Base |
| 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 |
| 1967-1979 | Chevrolet | Camaro | Base |
| 1979 | Chevrolet | Camaro | Berlinetta |
| 1975,1977-1978 | Chevrolet | Camaro | LT |
| 1977-1978 | Chevrolet | Camaro | LT Rally Sport |
| 1976-1979 | Chevrolet | Camaro | Rally Sport |
| 1967-1973,1975 | Chevrolet | Camaro | RS |
| 1967-1969,1987-1990 | Chevrolet | Caprice | Base |
| 1977-1979,1987-1990,1993 | Chevrolet | Caprice | Classic |
| 1987-1988 | Chevrolet | Caprice | Classic Brougham |
| 1977-1979 | Chevrolet | Caprice | Classic Landau |
| 1987-1988 | Chevrolet | Caprice | Classic LS Brougham |
| 1979 | Chevrolet | Caprice | Classic Sport |
| 1967-1968 | Chevrolet | Chevelle | 300 |
| 1967-1969 | Chevrolet | Chevelle | 300 Deluxe |
| 1964-1967,1970-1972 | Chevrolet | Chevelle | Base |
| 1967-1972 | Chevrolet | Chevelle | Concours |
| 1969-1972 | Chevrolet | Chevelle | Concours Estate |
| 1965-1967,1973 | Chevrolet | Chevelle | Deluxe |
| 1969-1972 | Chevrolet | Chevelle | Greenbrier |
| 1968-1972 | Chevrolet | Chevelle | Malibu |
| 1968-1972 | Chevrolet | Chevelle | Nomad |
| 1964-1972 | Chevrolet | Chevelle | SS |
| 1963-1967 | Chevrolet | Chevy II | Base |
| 1963-1968 | Chevrolet | Chevy II | Nova |
| 1964-1967 | Chevrolet | Chevy II | Nova SS |
| 1964-1977,1987 | Chevrolet | El Camino | Base |
| 1975-1977 | Chevrolet | El Camino | Classic |
| 1977 | Chevrolet | El Camino | Conquista |
| 1968-1974 | Chevrolet | El Camino | Custom |
| 1987 | Chevrolet | El Camino | SS |
| 1996-2003 | Chevrolet | Express 1500 | Base |
| 1996-2003 | Chevrolet | Express 1500 | LS |
| 2001-2002 | Chevrolet | Express 1500 | LT |
| 1996-2003 | Chevrolet | Express 2500 | Base |
| 1996-2003 | Chevrolet | Express 2500 | LS |
| 1983 | Chevrolet | G10 | Base |
| 1975-1984,1987-1995 | Chevrolet | G10 | Beauville |
| 1981-1984,1987 | Chevrolet | G10 | Bonaventure |
| 1975-1984,1987-1995 | Chevrolet | G10 | Chevy Van |
| 1975-1984,1987-1995 | Chevrolet | G10 | Sportvan |
| 1964-1967,1969-1974 | Chevrolet | G10 Van | Base |
| 1968-1974 | Chevrolet | G10 Van | Sportvan |
| 1975,1977-1984,1987-1995 | Chevrolet | G20 | Beauville |
| 1983-1984 | Chevrolet | G20 | Bonaventure |
| 1975,1977-1984,1987-1995 | Chevrolet | G20 | Chevy Van |
| 1978-1981 | Chevrolet | G20 | Nomad |
| 1978-1984,1987-1995 | Chevrolet | G20 | Sportvan |
| 1967-1974 | Chevrolet | G20 Van | Base |
| 1968-1974 | Chevrolet | G20 Van | Sportvan |
| 1976,1978-1979,1981-1984,1987-1995 | Chevrolet | G30 | Beauville |
| 1983-1984 | Chevrolet | G30 | Bonaventure |
| 1976,1978-1979,1981-1984,1987-1995 | Chevrolet | G30 | Chevy Van |
| 1976,1978-1979,1981-1984,1987-1995 | Chevrolet | G30 | Hi-Cube |
| 1970-1974 | Chevrolet | G30 Van | Base |
| 1970-1974 | Chevrolet | G30 Van | Sportvan |
| 1963-1973,1977-1979 | Chevrolet | Impala | Base |
| 1977 | Chevrolet | Impala | Custom |
| 1977-1979 | Chevrolet | Impala | Landau |
| 1979 | Chevrolet | Impala | Sport |
| 1964-1967 | Chevrolet | Impala | SS |
| 1968-1974 | Chevrolet | K10 Suburban | Base |
| 1975-1980 | Chevrolet | K10 Suburban | Custom Deluxe |
| 1975-1980 | Chevrolet | K10 Suburban | Scottsdale |
| 1975-1977,1979-1980 | Chevrolet | K10 Suburban | Silverado |
| 1994-1997 | Chevrolet | K1500 | Base |
| 1988-1998 | Chevrolet | K1500 | Cheyenne |
| 1988-1992 | Chevrolet | K1500 | Scottsdale |
| 1988-1998 | Chevrolet | K1500 | Silverado |
| 1991 | Chevrolet | K1500 | Sport |
| 1990-1998 | Chevrolet | K1500 | WT |
| 1968-1974 | Chevrolet | K20 Suburban | Base |
| 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 |
| 1976 | Chevrolet | K5 Blazer | Base |
| 1975-1980 | Chevrolet | K5 Blazer | Cheyenne |
| 1981-1982 | Chevrolet | K5 Blazer | Custom |
| 1975,1977-1980 | Chevrolet | K5 Blazer | Custom Deluxe |
| 1981 | Chevrolet | K5 Blazer | Deluxe |
| 1978,1980-1982 | Chevrolet | K5 Blazer | Silverado |
| 1964-1967,1973-1977 | Chevrolet | Malibu | Base |
| 1974-1977 | Chevrolet | Malibu | Classic |
| 1976-1977 | Chevrolet | Malibu | Classic Landau |
| 1977 | Chevrolet | Malibu | Classic Sport |
| 1973-1974 | Chevrolet | Malibu | Estate |
| 1976 | Chevrolet | Malibu | Landau |
| 1977 | Chevrolet | Malibu | Sport |
| 1987-1988 | Chevrolet | Monte Carlo | Base |
| 1987-1988 | Chevrolet | Monte Carlo | LS |
| 1969-1979 | Chevrolet | Nova | Base |
| 1976-1977 | Chevrolet | Nova | Concours |
| 1973-1975,1978-1979 | Chevrolet | Nova | Custom |
| 1975 | Chevrolet | Nova | LN |
| 1975,1978 | Chevrolet | Nova | Police |
| 1977-1979 | Chevrolet | Nova | Rally |
| 1987 | Chevrolet | R10 | Custom Deluxe |
| 1987 | Chevrolet | R10 | Scottsdale |
| 1987 | Chevrolet | R10 | Silverado |
| 1987 | Chevrolet | R20 | Custom Deluxe |
| 1987 | Chevrolet | R20 | Scottsdale |
| 1987 | Chevrolet | R20 | Silverado |
| 1991 | Chevrolet | S10 | Baja |
| 1988-2003 | Chevrolet | S10 | Base |
| 1988-1990 | Chevrolet | S10 | Durango |
| 1992-1993 | Chevrolet | S10 | EL |
| 1994-2003 | Chevrolet | S10 | LS |
| 1988-1989 | Chevrolet | S10 | Sport |
| 1994-1998 | Chevrolet | S10 | SS |
| 1988-1992 | Chevrolet | S10 | Tahoe |
| 1999-2003 | Chevrolet | S10 | Xtreme |
| 1994-2003 | Chevrolet | S10 | ZR2 |
| 2002-2003 | Chevrolet | S10 | ZR5 |
| 1988-1994 | Chevrolet | S10 Blazer | Base |
| 1988-1989 | Chevrolet | S10 Blazer | High Country |
| 1994 | Chevrolet | S10 Blazer | LT |
| 1988-1990,1992 | Chevrolet | S10 Blazer | Sport |
| 1988,1990-1994 | Chevrolet | S10 Blazer | Tahoe |
| 1991-1994 | Chevrolet | S10 Blazer | Tahoe LT |
| 1999-2003 | Chevrolet | Silverado 1500 | Base |
| 1999-2003 | Chevrolet | Silverado 1500 | LS |
| 1999-2003 | Chevrolet | Silverado 1500 | LT |
| 2002-2003 | Chevrolet | Silverado 1500 | WT |
| 1963-1966 | Chevrolet | Suburban | Base |
| 1987 | Chevrolet | V10 | Custom Deluxe |
| 1987 | Chevrolet | V10 | Scottsdale |
| 1987 | Chevrolet | V10 | Silverado |
| 1959 | Fiat | 1100 | Base |
| 1976-1977 | Ford | F-100 | Base |
| 1975-1977,1979 | Ford | F-100 | Custom |
| 1975-1977 | Ford | F-100 | Northland |
| 1975-1977,1979 | Ford | F-100 | Ranger |
| 1979 | Ford | F-100 | Ranger Lariat |
| 1975-1977,1979 | Ford | F-100 | Ranger XLT |
| 1977 | Ford | F-100 | XLT |
| 1976-1978 | Ford | F-150 | Base |
| 1975-1979 | Ford | F-150 | Custom |
| 1975-1978 | Ford | F-150 | Northland |
| 1975-1979 | Ford | F-150 | Ranger |
| 1978-1979 | Ford | F-150 | Ranger Lariat |
| 1975-1979 | Ford | F-150 | Ranger XLT |
| 1977 | Ford | F-150 | XLT |
| 1976-1978,1983-1986 | Ford | F-250 | Base |
| 1975-1979,1987-1992 | Ford | F-250 | Custom |
| 1975-1978 | Ford | F-250 | Northland |
| 1975-1979 | Ford | F-250 | Ranger |
| 1978-1979 | Ford | F-250 | Ranger Lariat |
| 1975-1979 | Ford | F-250 | Ranger XLT |
| 1983-1994 | Ford | F-250 | XL |
| 1983 | Ford | F-250 | XLS |
| 1977,1983-1984,1993-1994 | Ford | F-250 | XLT |
| 1985-1992 | Ford | F-250 | XLT Lariat |
| 1976-1978,1983-1986 | Ford | F-350 | Base |
| 1975-1979,1987-1992 | Ford | F-350 | Custom |
| 1975-1978 | Ford | F-350 | Northland |
| 1975-1979 | Ford | F-350 | Ranger |
| 1978-1979 | Ford | F-350 | Ranger Lariat |
| 1975-1979 | Ford | F-350 | Ranger XLT |
| 1983-1994 | Ford | F-350 | XL |
| 1983 | Ford | F-350 | XLS |
| 1977,1983-1984,1993-1994 | Ford | F-350 | XLT |
| 1985-1992 | Ford | F-350 | XLT Lariat |
| 1975-1978 | GMC | C15 | Base |
| 1977-1978 | GMC | C15 | Heavy Half |
| 1975-1978 | GMC | C15 | High Sierra |
We use UPS, FedEx, DHL, and USPS for deliveries. We are not responsible for any shipping problems and shall not be held liable for any "reasonable" delay beyond our advertised delivery time-frames. Shipment by Ground Courier can take up to 15 business days for delivery. Express Courier can take up to 3 business days for delivery. Shipping time frames are once the order has been processed. Due to high demand, order processing can take 5 to 7 business days.
