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COMP Cams Positive Stop PTFE Seal Guide Size: .530"

COMP Cams 503-12

249-503-12

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COMP Cams Positive Stop PTFE Seal Guide Size: .530" $16.99
Positive Stop PTFE Seal
  • Guide Size: .530''
  • Valve Size: 11/32''
  • 12/pkg

  • COMP Cams 503-12 Details

    Positive Stop PTFE Seals

  • 1 Year Limited Warranty

  • Specifications:

    Diameter (in.)
    0.34375
    Machine Work Required
    Yes
    Quantity
    Sold as a set of 12
    Valve Guide Diameter (in.)
    0.53
    Valve Stem Diameter (in.)
    0.344
    Valve Stem Seal Material
    PTFE
    Valve Stem Seal Type
    Positive stop
    Manufacturer's Part Number:
    503-12

    Comp Cams offers a complete line of valve stem seals, from the stock GM O-ring to the positive stop PTFE seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. O-ring seals use the standard retainer and oil splash shield. Umbrella seals are normally used when a larger-than-stock diameter spring is used; in the case of a double spring, positive stop PTFE seals are used. There is also a smaller diameter Viton seal available for triple spring applications. O-rings and umbrella seals require no machining, but PTFE seals require the heads to be disassembled so the top guides can be machined with a special .530" diameter cutter. Whenever you're planning an overhaul or cam change, don't forget the valve seals!

    Features:
  • Excellent Sealing Properties
  • O-Ring & Umbrella Seals Require No Machining

  • Does COMP Cams 503-12 fit your vehicle?

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    Aspiration

    1975-1979 FORD F-150

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1980 GMC K2500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: HIGH SIERRA
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1969-1970 CHEVROLET G10 VAN

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1964-1965 CHEVROLET G10 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.2
    • SubModel: BASE
    • CUI: 194
    • EngineType: L6 ( 3.2 L / 194 )

    1994-1995 CHEVROLET C2500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1967 CHEVROLET CHEVELLE

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: 300 DELUXE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1975 CHEVROLET NOVA

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: POLICE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1968-1969 CHEVROLET EL CAMINO

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: CUSTOM
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1975-1976 GMC K25 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: HIGH SIERRA
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1972-1974 GMC G35/G3500 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: RALLY
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1972-1974 CHEVROLET G20 VAN

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1967-1969 CHEVROLET CAMARO

    • CC: 3769
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: RS
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1967-1968 GMC C15/C1500 SUBURBAN

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1974-1975 CHEVROLET CAMARO

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1975-1982 GMC C1500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: SIERRA GRANDE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1987 CHEVROLET R20 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: SCOTTSDALE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1996-1998 CHEVROLET S10 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • Aspiration: N
    • SubModel: SS
    • Engine Vin: W
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1972-1974 CHEVROLET G30 VAN

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1979-1984 GMC G25/G2500 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: RALLY
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1990-1998 CHEVROLET C1500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: WT
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1967-1973 CHEVROLET CAMARO

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: RS
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1978-1979 FORD F-350

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.5
    • SubModel: RANGER LARIAT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975 GMC C35/C3500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1977-1979 CHEVROLET CAPRICE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: CLASSIC LANDAU
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1964-1967 CHEVROLET EL CAMINO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1977-1979 CHEVROLET IMPALA

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: LANDAU
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1972-1973 CHEVROLET IMPALA

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1968 GMC K25/K2500 SUBURBAN

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1975-1977 GMC SPRINT

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: CLASSIC
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1967 CHEVROLET CHEVELLE

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: DELUXE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1987-1988 CHEVROLET CAPRICE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: CLASSIC BROUGHAM
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1975-1978 GMC K15 SUBURBAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: HIGH SIERRA
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1969-1971 GMC K35/K3500 PICKUP

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1968 GMC K15/K1500

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1967 GMC G15/G1500 VAN

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1969 CHEVROLET CHEVELLE

    • CC: 3769
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: GREENBRIER
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1988-1998 CHEVROLET K1500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: SILVERADO
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1980 GMC K2500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: SIERRA GRANDE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1975-1977 CHEVROLET EL CAMINO

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: CLASSIC
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1963-1966 CHEVROLET SUBURBAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1981-1984 CHEVROLET G10 VAN

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BONAVENTURE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1999-2003 CHEVROLET SILVERADO 1500

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: LS
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    2000-2003 CHEVROLET S10 BLAZER

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: LS

    1996-2003 CHEVROLET EXPRESS 2500

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1979 FORD F-100

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1970-1972 CHEVROLET CHEVELLE

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1989 PONTIAC FIREBIRD

    • CC: 3800
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: TRANS AM
    • CUI: 231
    • EngineType: V6 ( 3.8 L / 231 )

    1965 CHEVROLET CHEVELLE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: DELUXE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1977-1979 CHEVROLET IMPALA

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1993 CHEVROLET CAPRICE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: CLASSIC
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1968-1969 CHEVROLET G10 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: SPORTVAN
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1976 CHEVROLET G30 VAN

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BEAUVILLE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1966-1967 CHEVROLET G10 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1974 CHEVROLET EL CAMINO

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: CUSTOM
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1995 CHEVROLET ASTRO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: CL

    1969-1971 CHEVROLET CHEVELLE

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: GREENBRIER
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1971-1974 GMC G25/G2500 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: RALLY
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1976 CHEVROLET K5 BLAZER

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1987 CHEVROLET EL CAMINO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1979-1980 GMC C1500 SUBURBAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: HIGH SIERRA
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1977-1984 GMC G15/G1500 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: RALLY
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1964-1965 CHEVROLET IMPALA

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: SS
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1983-1984 GMC G25/G2500 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: RALLY CUSTOM
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1972-1974 GMC K1500 PICKUP

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1978 GMC C35/C3500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1978-1979 GMC G35/G3500 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: VANDURA
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1963-1965 CHEVROLET BISCAYNE

    • CC: 3769
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: BASE
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1983-1986 FORD F-350

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1969-1971 GMC C25/C2500 PICKUP

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1970-1971 GMC G15/G1500 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: VANDURA

    1975 GMC C35/C3500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: HIGH SIERRA
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1987-1988 CHEVROLET CAPRICE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: CLASSIC
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1978-1984 CHEVROLET G20 VAN

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: SPORTVAN
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1990 CHEVROLET S10 BLAZER

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: TAHOE

    1968-1972 CHEVROLET CHEVELLE

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: NOMAD
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1990 CHEVROLET S10 BLAZER

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: SPORT

    1964-1966 CHEVROLET CHEVY II

    • CC: 3769
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 3.8
    • SubModel: NOVA SS
    • CUI: 230
    • EngineType: L6 ( 3.8 L / 230 )

    1971 CHEVROLET G10 VAN

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: SPORTVAN
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1983-1984 GMC G15/G1500 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: RALLY CUSTOM
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1978-1979 CHEVROLET G30 VAN

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BEAUVILLE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1975-1984 GMC K1500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1994-1995 CHEVROLET K2500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1977 GMC C1500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: INDY HAULER
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1991-1994 OLDSMOBILE BRAVADA

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1965-1971 CHEVROLET IMPALA

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1987 CHEVROLET V10 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: CUSTOM DELUXE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1995 CHEVROLET ASTRO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: CS

    1987-1995 CHEVROLET G20 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: CHEVY VAN
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1996-2000 CHEVROLET ASTRO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1983-1986 FORD F-250

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1991-1994 CHEVROLET ASTRO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    2003 CHEVROLET SILVERADO 1500

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1968-1970 CHEVROLET G10 VAN

    • CC: 4097
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: SPORTVAN
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1977-1978 GMC C25/C2500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: HIGH SIERRA
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1994-1997 CHEVROLET K1500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1993-1994 FORD F-350

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.5
    • SubModel: XLT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1987-1995 CHEVROLET G10 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: BEAUVILLE
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1988-1989 CHEVROLET S10 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: SPORT
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1977-1978 GMC C25/C2500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: SIERRA CLASSIC
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1972-1974 CHEVROLET G10 VAN

    • CC: 4098
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )
    Items You Need
    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

    Tools:

    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.