COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. This 505 seal has a .630" outer diameter and fits applications with 3/8" valves and .530" OD valve guides.

This Part Fits:

Year	Make	Model	Submodel
1980	Buick	Electra	Estate Wagon
1980	Buick	Electra	Limited
1980	Buick	Electra	Park Avenue
1980	Buick	Estate Wagon	Base
1980	Buick	LeSabre	Base
1980	Buick	LeSabre	Limited
2002-2003	Chevrolet	Avalanche 2500	Base
1980	Chevrolet	C10	Big Ten
1980	Chevrolet	C10	Cheyenne
1980	Chevrolet	C10	Custom Deluxe
1980	Chevrolet	C10	Scottsdale
1980	Chevrolet	C10	Silverado
1980	Chevrolet	C10 Suburban	Custom Deluxe
1980	Chevrolet	C10 Suburban	Scottsdale
1980	Chevrolet	C10 Suburban	Silverado
1990-1993	Chevrolet	C1500	454 SS
1990-1993	Chevrolet	C1500	Cheyenne
1990	Chevrolet	C1500	Scottsdale
1990-1993	Chevrolet	C1500	Silverado
1990-1993	Chevrolet	C1500	WT
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
1994-1997,1999	Chevrolet	C2500	Base
1991-1998	Chevrolet	C2500	Cheyenne
1999	Chevrolet	C2500	LS
1991-1992	Chevrolet	C2500	Scottsdale
1991-1998	Chevrolet	C2500	Silverado
1994-1995,1998	Chevrolet	C2500	WT
1992-1999	Chevrolet	C2500 Suburban	Base
1995-1999	Chevrolet	C2500 Suburban	LS
1995-1997	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
1994-1997,1999	Chevrolet	C3500	Base
1988-1998	Chevrolet	C3500	Cheyenne
1999	Chevrolet	C3500	LS
1988-1992	Chevrolet	C3500	Scottsdale
1988-1998	Chevrolet	C3500	Silverado
1996-1999,2001-2002	Chevrolet	Express 3500	Base
1996-1999,2001-2002	Chevrolet	Express 3500	LS
1988-1996	Chevrolet	G30	Beauville
1988-1996	Chevrolet	G30	Chevy Van
1988-1996	Chevrolet	G30	Hi-Cube
1988-1996	Chevrolet	G30	Sportvan
1980	Chevrolet	K10	Cheyenne
1980	Chevrolet	K10	Custom Deluxe
1980	Chevrolet	K10	Scottsdale
1980	Chevrolet	K10	Silverado
1980	Chevrolet	K20	Cheyenne
1980	Chevrolet	K20	Custom Deluxe
1980	Chevrolet	K20	Scottsdale
1980	Chevrolet	K20	Silverado
1985	Chevrolet	K20 Suburban	Custom
1985	Chevrolet	K20 Suburban	Scottsdale
1985	Chevrolet	K20 Suburban	Silverado
1994-1997,1999	Chevrolet	K2500	Base
1991-1998	Chevrolet	K2500	Cheyenne
1999	Chevrolet	K2500	LS
1991-1992	Chevrolet	K2500	Scottsdale
1991-1998	Chevrolet	K2500	Silverado
1994-1995,1998	Chevrolet	K2500	WT
1992-1999	Chevrolet	K2500 Suburban	Base
1995-1999	Chevrolet	K2500 Suburban	LS
1995-1997	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
1994-1997,1999	Chevrolet	K3500	Base
1988-1998	Chevrolet	K3500	Cheyenne
1999	Chevrolet	K3500	LS
1988-1992	Chevrolet	K3500	Scottsdale
1988-1998	Chevrolet	K3500	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	Chevrolet	R2500	Cheyenne
1989	Chevrolet	R2500	Scottsdale
1989	Chevrolet	R2500	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
2001-2002	Chevrolet	Silverado 2500 HD	Base
2001-2002	Chevrolet	Silverado 2500 HD	LS
2001-2002	Chevrolet	Silverado 2500 HD	LT
2001-2002	Chevrolet	Silverado 3500	Base
2001-2002	Chevrolet	Silverado 3500	LS
2001-2002	Chevrolet	Silverado 3500	LT
2001	Chevrolet	Suburban 2500	Base
2001-2002	Chevrolet	Suburban 2500	LS
2001-2002	Chevrolet	Suburban 2500	LT
1987	Chevrolet	V20 Suburban	Custom Deluxe
1987-1988	Chevrolet	V20 Suburban	Scottsdale
1987-1988	Chevrolet	V20 Suburban	Silverado
1990	Chevrolet	V2500 Suburban	Scottsdale
1990	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
1989-1990	Chevrolet	V3500	Scottsdale
1989-1991	Chevrolet	V3500	Silverado
1980	Chrysler	Cordoba	300
1980-1983	Chrysler	Cordoba	Base
1980	Chrysler	Cordoba	Crown
1980-1982	Chrysler	Cordoba	LS
1983-1989	Chrysler	Fifth Avenue	Base
1980-1981	Chrysler	LeBaron	Base
1980-1981	Chrysler	LeBaron	Medallion
1980-1981	Chrysler	LeBaron	Salon
1980-1981	Chrysler	LeBaron	Special
1980-1982	Chrysler	New Yorker	Base
1980-1981	Chrysler	Newport	Base
1980-1981	Chrysler	Town & Country	Base
1980	Dodge	Aspen	Base
1980	Dodge	B100	Base
1981-1991	Dodge	B150	Base
1980	Dodge	B200	Base
1981-1991	Dodge	B250	Base
1980	Dodge	B300	Base
1981-1991	Dodge	B350	Base
1980	Dodge	CB300	Base
1986-1989	Dodge	D100	Custom
1980-1991	Dodge	D150	Base
1982-1983	Dodge	D150	Miser
1990-1991	Dodge	D150	S
1980	Dodge	D200	Base
1981-1991	Dodge	D250	Base
1980	Dodge	D300	Base
1981-1991	Dodge	D350	Base
1980-1981	Dodge	D400	Base
1980-1981	Dodge	D450	Base
1990-1991	Dodge	Dakota	Base
1990-1991	Dodge	Dakota	LE
1990-1991	Dodge	Dakota	S
1990-1991	Dodge	Dakota	SE
1989	Dodge	Dakota	Shelby
1991	Dodge	Dakota	Sport
1980-1981	Dodge	Diplomat	Base
1980-1983	Dodge	Diplomat	Medallion
1980-1989	Dodge	Diplomat	Salon
1984-1989	Dodge	Diplomat	SE
1980-1983	Dodge	Mirada	Special Coupe
1980-1991	Dodge	Ramcharger	Base
1991	Dodge	Ramcharger	Canyon Sport
1981-1991	Dodge	Ramcharger	Royal SE
1980	Dodge	Ramcharger	SE
1980	Dodge	RD200	Base
1980-1981	Dodge	St. Regis	Base
1986-1989	Dodge	W100	Custom
1980-1991	Dodge	W150	Base
1990-1991	Dodge	W150	S
1980	Dodge	W200	Base
1981-1991	Dodge	W250	Base
1980	Dodge	W300	Base
1981-1991	Dodge	W350	Base
1980	GMC	C1500	Base
1980	GMC	C1500	Heavy Half
1980	GMC	C1500	High Sierra
1980	GMC	C1500	Sierra Classic
1980	GMC	C1500	Sierra Grande
1980	GMC	C1500	Street Coupe
1980	GMC	C1500 Suburban	Base
1980	GMC	C1500 Suburban	High Sierra
1980	GMC	C1500 Suburban	Sierra Classic
1980	GMC	C1500 Suburban	Sierra Grande
1980-1986	GMC	C2500	Base
1980-1986	GMC	C2500	High Sierra
1991-1993	GMC	C2500	Sierra
1980-1986	GMC	C2500	Sierra Classic
1980-1982	GMC	C2500	Sierra Grande
1994-1999	GMC	C2500	Sierra SL