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.
This Part Fits:
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1980-1981 | Buick | Century | Base |
| 1980-1981 | Buick | Century | Estate |
| 1980-1981 | Buick | Century | 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 |
| 1987-1990 | Cadillac | Brougham | Base |
| 1987-1990 | Cadillac | Brougham | d'Elegance |
| 1986 | Cadillac | Fleetwood | Brougham |
| 1986 | Cadillac | Fleetwood | Brougham d'Elegance |
| 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 |
| 1980 | Chevrolet | C10 | Big Ten |
| 1980-1981 | Chevrolet | C10 | Cheyenne |
| 1981-1986 | Chevrolet | C10 | Custom |
| 1980 | Chevrolet | C10 | Custom Deluxe |
| 1981 | Chevrolet | C10 | Deluxe |
| 1980-1986 | Chevrolet | C10 | Scottsdale |
| 1980-1986 | Chevrolet | C10 | Silverado |
| 1981-1986 | Chevrolet | C10 Suburban | Custom |
| 1980 | Chevrolet | C10 Suburban | Custom Deluxe |
| 1981 | Chevrolet | C10 Suburban | Deluxe |
| 1980,1982,1984-1986 | Chevrolet | C10 Suburban | Scottsdale |
| 1980,1982-1986 | Chevrolet | C10 Suburban | Silverado |
| 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 |
| 1980-1981 | Chevrolet | C20 | Cheyenne |
| 1981-1986 | Chevrolet | C20 | Custom |
| 1980 | Chevrolet | C20 | Custom Deluxe |
| 1981 | Chevrolet | C20 | Deluxe |
| 1980-1986 | Chevrolet | C20 | Scottsdale |
| 1980-1986 | Chevrolet | C20 | Silverado |
| 1981-1986 | Chevrolet | C20 Suburban | Custom |
| 1980 | Chevrolet | C20 Suburban | Custom Deluxe |
| 1981 | Chevrolet | C20 Suburban | Deluxe |
| 1980,1982,1984-1986 | Chevrolet | C20 Suburban | Scottsdale |
| 1980,1982-1986 | Chevrolet | C20 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 |
| 1980-1981 | Chevrolet | C30 | Cheyenne |
| 1981-1986 | Chevrolet | C30 | Custom |
| 1980 | Chevrolet | C30 | Custom Deluxe |
| 1981 | Chevrolet | C30 | Deluxe |
| 1980-1986 | Chevrolet | C30 | Scottsdale |
| 1980-1986 | Chevrolet | C30 | Silverado |
| 1994-1995 | Chevrolet | C3500 | Base |
| 1988-1995 | Chevrolet | C3500 | Cheyenne |
| 1988-1992 | Chevrolet | C3500 | Scottsdale |
| 1988-1995 | Chevrolet | C3500 | Silverado |
| 1980,1988 | Chevrolet | Camaro | Base |
| 1980-1986 | Chevrolet | Camaro | Berlinetta |
| 1985-1990 | Chevrolet | Camaro | Iroc-Z |
| 1987 | Chevrolet | Camaro | LT |
| 1980 | Chevrolet | Camaro | Rally Sport |
| 1989-1992 | Chevrolet | Camaro | RS |
| 1992 | Chevrolet | Camaro | RS Heritage Edition |
| 1981-1987 | Chevrolet | Camaro | Sport |
| 1980-1987,1991-1992 | Chevrolet | Camaro | Z28 |
| 1992 | Chevrolet | Camaro | Z28 Heritage Edition |
| 1982 | Chevrolet | Camaro | Z28 Indianapolis 500 Pace Car |
| 1986-1992 | Chevrolet | Caprice | Base |
| 1980-1993 | Chevrolet | Caprice | Classic |
| 1986-1990 | Chevrolet | Caprice | Classic Brougham |
| 1981-1982 | Chevrolet | Caprice | Classic Estate |
| 1980-1981 | Chevrolet | Caprice | Classic Landau |
| 1993 | Chevrolet | Caprice | Classic LS |
| 1987-1990 | Chevrolet | Caprice | Classic LS Brougham |
| 1991-1993 | Chevrolet | Caprice | Classic LTZ |
| 1980 | Chevrolet | Caprice | Classic Sport |
| 1988 | Chevrolet | Corvette | 35th Anniversary Edition |
| 1980-1982,1984-1991 | Chevrolet | Corvette | Base |
| 1982 | Chevrolet | Corvette | Collector's Edition |
| 1986 | Chevrolet | Corvette | Indianapolis 500 Pace Car |
| 1980-1987 | Chevrolet | El Camino | Base |
| 1981-1986 | Chevrolet | El Camino | Conquista |
| 1980-1981 | Chevrolet | El Camino | Royal Knight |
| 1980-1987 | Chevrolet | El Camino | SS |
| 1983 | Chevrolet | G10 | Base |
| 1980-1995 | Chevrolet | G10 | Beauville |
| 1981-1984,1986-1987 | Chevrolet | G10 | Bonaventure |
| 1980-1995 | Chevrolet | G10 | Chevy Van |
| 1980-1995 | Chevrolet | G10 | Sportvan |
| 1980-1995 | Chevrolet | G20 | Beauville |
| 1983-1984 | Chevrolet | G20 | Bonaventure |
| 1980-1995 | Chevrolet | G20 | Chevy Van |
| 1980-1981 | Chevrolet | G20 | Nomad |
| 1980-1995 | Chevrolet | G20 | Sportvan |
| 1980-1996 | Chevrolet | G30 | Beauville |
| 1983-1984 | Chevrolet | G30 | Bonaventure |
| 1980-1996 | Chevrolet | G30 | Chevy Van |
| 1980-1996 | Chevrolet | G30 | Hi-Cube |
| 1980-1996 | Chevrolet | G30 | Sportvan |
| 1980-1985 | Chevrolet | Impala | Base |
| 1981-1982 | Chevrolet | Impala | Estate |
| 1980 | Chevrolet | Impala | Sport |
| 1980-1981 | Chevrolet | K10 | Cheyenne |
| 1981-1986 | Chevrolet | K10 | Custom |
| 1980 | Chevrolet | K10 | Custom Deluxe |
| 1981 | Chevrolet | K10 | Deluxe |
| 1980-1986 | Chevrolet | K10 | Scottsdale |
| 1980-1986 | Chevrolet | K10 | Silverado |
| 1981-1986 | Chevrolet | K10 Suburban | Custom |
| 1980 | Chevrolet | K10 Suburban | Custom Deluxe |
| 1981 | Chevrolet | K10 Suburban | Deluxe |
| 1980,1982,1984-1986 | Chevrolet | K10 Suburban | Scottsdale |
| 1980,1982-1983,1985-1986 | Chevrolet | K10 Suburban | Silverado |
| 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 |
| 1980-1981 | Chevrolet | K20 | Cheyenne |
| 1981-1986 | Chevrolet | K20 | Custom |
| 1980 | Chevrolet | K20 | Custom Deluxe |
| 1981 | Chevrolet | K20 | Deluxe |
| 1980-1986 | Chevrolet | K20 | Scottsdale |
| 1980-1983,1985-1986 | Chevrolet | K20 | Silverado |
| 1981-1986 | Chevrolet | K20 Suburban | Custom |
| 1980 | Chevrolet | K20 Suburban | Custom Deluxe |
| 1981 | Chevrolet | K20 Suburban | Deluxe |
| 1980,1982,1984-1986 | Chevrolet | K20 Suburban | Scottsdale |
| 1980,1982-1983,1985-1986 | Chevrolet | K20 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 |
| 1980-1981 | Chevrolet | K30 | Cheyenne |
| 1981-1986 | Chevrolet | K30 | Custom |
| 1980 | Chevrolet | K30 | Custom Deluxe |
| 1981 | Chevrolet | K30 | Deluxe |
| 1980-1986 | Chevrolet | K30 | Scottsdale |
| 1980-1986 | Chevrolet | K30 | Silverado |
| 1994-1995 | Chevrolet | K3500 | Base |
| 1988-1995 | Chevrolet | K3500 | Cheyenne |
| 1988-1992 | Chevrolet | K3500 | Scottsdale |
| 1988-1995 | Chevrolet | K3500 | Silverado |
| 1980 | Chevrolet | K5 Blazer | Cheyenne |
| 1981-1986 | Chevrolet | K5 Blazer | Custom |
| 1980 | Chevrolet | K5 Blazer | Custom Deluxe |
| 1981 | Chevrolet | K5 Blazer | Deluxe |
| 1984 | Chevrolet | K5 Blazer | Scottsdale |
| 1980-1986 | Chevrolet | K5 Blazer | Silverado |
| 1980-1981 | Chevrolet | Malibu | Base |
| 1980-1983 | Chevrolet | Malibu | Classic |
| 1980 | Chevrolet | Malibu | Classic Estate |
| 1980-1981 | Chevrolet | Malibu | Classic Landau |
| 1980 | Chevrolet | Malibu | Classic Sport |
| 1980 | Chevrolet | Malibu | Estate |
| 1980 | Chevrolet | Malibu | Sport |
| 1981-1988 | Chevrolet | Monte Carlo | Base |
| 1983 | Chevrolet | Monte Carlo | CL |
| 1980-1981 | Chevrolet | Monte Carlo | Landau |
| 1986-1988 | Chevrolet | Monte Carlo | LS |
| 1980 | Chevrolet | Monte Carlo | Sport |
| 1983-1988 | Chevrolet | Monte Carlo | SS |
- 1980-chevrolet-camaro-base-esi6745177
- 1980-chevrolet-camaro-berlinetta-esi4261389
- 1980-chevrolet-camaro-z28-esi6974091
- 1980-gmc-jimmy-base-esi1156894
- 1980-gmc-jimmy-high-sierra-esi2597701
- 1980-gmc-jimmy-sierra-classic-esi3794682
- 1980-gmc-jimmy-sierra-grande-esi8145365
- 1980-gmc-jimmy-street-coupe-esi2850303
- 1980-gmc-k1500-base-esi5894281
- 1980-gmc-k1500-high-sierra-esi2749626
- 1980-gmc-k1500-sierra-grande-esi6308937
- 1980-gmc-k2500-base-esi4740615
- 1980-gmc-k2500-high-sierra-esi2636152
- 1980-pontiac-firebird-formula-esi1216143
- 1980-pontiac-firebird-trans-am-esi1815751
- 1981-chevrolet-camaro-berlinetta-esi1630257
- 1981-chevrolet-camaro-sport-esi1895867
- 1981-chevrolet-camaro-z28-esi7632853
- 1981-gmc-jimmy-base-esi4351537
- 1981-gmc-jimmy-high-sierra-esi4932083
- 1981-gmc-jimmy-sierra-classic-esi1352529
- 1981-gmc-jimmy-sierra-grande-esi8965333
- 1981-gmc-jimmy-street-coupe-esi1195318
- 1981-gmc-k1500-base-esi9246850
- 1981-gmc-k1500-high-sierra-esi7070743
- 1981-gmc-k1500-sierra-classic-esi6542831
- 1981-gmc-k1500-sierra-grande-esi5411804
- 1981-gmc-k2500-base-esi2725860
- 1981-gmc-k2500-high-sierra-esi4090250
- 1981-pontiac-firebird-formula-esi4738184
- 1981-pontiac-firebird-trans-am-esi4147388
- 1982-gmc-jimmy-base-esi3662879
- 1982-gmc-jimmy-high-sierra-esi7134398
- 1982-gmc-jimmy-sierra-classic-esi4983199
- 1982-gmc-jimmy-sierra-grande-esi7048601
- 1982-gmc-jimmy-street-coupe-esi1221781
- 1982-gmc-k1500-base-esi8656019
- 1982-gmc-k1500-high-sierra-esi8051072
- 1982-gmc-k1500-sierra-classic-esi5338671
- 1982-gmc-k1500-sierra-grande-esi7240693
- 1982-gmc-k2500-base-esi9850188
- 1982-gmc-k2500-high-sierra-esi5550686
- 1983-gmc-jimmy-base-esi1675544
- 1983-gmc-jimmy-high-sierra-esi4694821
- 1983-gmc-jimmy-sierra-classic-esi1900176
- 1983-gmc-k1500-base-esi2721238
- 1983-gmc-k1500-high-sierra-esi4016535
- 1983-gmc-k1500-sierra-classic-esi2938007
- 1983-gmc-k2500-base-esi9174440
- 1983-gmc-k2500-high-sierra-esi5171684
- 1984-chevrolet-corvette-base-esi8509047
- 1984-gmc-jimmy-base-esi2038462
- 1984-gmc-jimmy-high-sierra-esi1510165
- 1984-gmc-jimmy-sierra-classic-esi9427174
- 1984-gmc-k1500-base-esi2169947
- 1984-gmc-k1500-high-sierra-esi8825574
- 1984-gmc-k1500-sierra-classic-esi2692149
- 1984-gmc-k2500-base-esi6771843
- 1984-gmc-k2500-high-sierra-esi8148425
- 1985-chevrolet-corvette-base-esi6612235
- 1985-gmc-jimmy-base-esi6827995
- 1985-gmc-jimmy-high-sierra-esi9555274
- 1985-gmc-k1500-base-esi1082921
- 1985-gmc-k1500-high-sierra-esi1938177
- 1985-gmc-k2500-base-esi2267329
- 1985-gmc-k2500-high-sierra-esi4635088
- 1986-chevrolet-corvette-base-esi8113516
- 1986-chevrolet-corvette-indianapolis-500-pace-car-esi6561185
- 1986-gmc-jimmy-base-esi9470575
- 1986-gmc-jimmy-sierra-classic-esi6978104
- 1986-gmc-k1500-base-esi9906945
- 1986-gmc-k1500-high-sierra-esi7603512
- 1986-gmc-k2500-base-esi5977702
- 1986-gmc-k2500-high-sierra-esi6523829
- 1987-chevrolet-corvette-base-esi5538255
- 1987-gmc-jimmy-base-esi3809911
- 1987-gmc-jimmy-sierra-classic-esi6473046
- 1988-gmc-jimmy-base-esi3395162
- 1988-gmc-jimmy-sierra-classic-esi6711044
- 1989-gmc-jimmy-base-esi8207955
- 1989-gmc-jimmy-sierra-classic-esi6429700
- 1990-gmc-jimmy-base-esi8810905
- 1991-gmc-jimmy-base-esi7275095
- Bucket:Chevy
- Bucket:Ford
- Engine Components>Valve Seals
- EPA:N/A
- LTL:N
- MPN:503-16
- Non-CARB:N
- Prop65:Y
- SpecialOrder:Y