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COMP Cams 503-8

Positive Stop PTFE Seal Guide Size: .530"

COMP Cams 503-8

249-503-8

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COMP Cams 503-8 Positive Stop PTFE Seal Guide Size: .530" $17.99
Positive Stop PTFE Seal
  • Guide Size: .530''
  • Valve Size: 11/32''
  • 8/pkg

  • COMP Cams 503-8 Details

    Positive Stop PTFE Seals

  • 1 Year Limited Warranty

  • Specifications:

    Diameter (in.)
    0.34375
    Machine Work Required
    Yes
    Quantity
    Sold as a set of 8
    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:
    503-8

    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 503-8 fit your vehicle?

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    Aspiration

    1974 CHEVROLET MONTE CARLO

    • CC: 5737
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: T
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981-1986 CHEVROLET C30 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1992-1993 CHEVROLET C2500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: SILVERADO
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1978 PONTIAC GRAND PRIX

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1985 BUICK SOMERSET REGAL

    • CC: 2474
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 2.5
    • SubModel: LIMITED
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1977-1979 CHEVROLET NOVA

    • CC: 5031
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: RALLY
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1964-1967 MERCURY CALIENTE

    • CC: 4727
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.7
    • SubModel: BASE
    • CUI: 289
    • EngineType: V8 ( 4.7 L / 289 )

    1975-1977 MERCURY MONARCH

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.8
    • SubModel: GHIA
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1968 CHEVROLET K20 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.4
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1968-1971 CHEVROLET CAMARO

    • CC: 5736
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: SS
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 PONTIAC SAFARI

    • CC: 5733
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981 PONTIAC FIREBIRD

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.9
    • SubModel: TRANS AM
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1970-1971 CHEVROLET EL CAMINO

    • CC: 6588
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: SS
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1968 PONTIAC TEMPEST

    • CC: 5733
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1981 FORD F-250

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.8
    • SubModel: RANGER XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1968 CHEVROLET CHEVELLE

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

    1973 MERCURY MONTEGO

    • CC: 4949
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: GT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1971 FORD TORINO

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

    1977-1978 CHEVROLET K5 BLAZER

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: CUSTOM DELUXE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1976 CHEVROLET MALIBU

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: LANDAU
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979 CHEVROLET CAMARO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1994-1995 FORD F-150

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: XL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1968-1974 FORD E-200 ECONOLINE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977-1980 LINCOLN VERSAILLES

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

    1980-1982 FORD F-350

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1983 FORD F-100

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1976-1978 FORD F-250

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1958 CHEVROLET DEL RAY

    • CC: 4638
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1982 FORD F-350

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: XLS
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1973 PONTIAC GRANDVILLE

    • CC: 6555
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1976-1977 OLDSMOBILE CUTLASS

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: COLONNADE S
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1983 OLDSMOBILE OMEGA

    • CC: 2474
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 2.5
    • SubModel: ESC
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1982-1986 CHEVROLET C20 SUBURBAN

    • CC: 5031
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: SILVERADO
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1982-1984 OLDSMOBILE CUTLASS CALAIS

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1977 PONTIAC VENTURA

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: SJ
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1969-1971 CHEVROLET C30 PICKUP

    • CC: 5736
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 FORD RANCHERO

    • CC: 7030
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: 500
    • Engine Vin: C
    • CUI: 429
    • EngineType: V8 ( 7.0 L / 429 )

    1972-1974 FORD GRAN TORINO

    • CC: 6556
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: SQUIRE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1968 CHEVROLET C10 SUBURBAN

    • CC: 5358
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1972-1973 MERCURY MONTEGO

    • CC: 7030
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 429
    • EngineType: V8 ( 7.0 L / 429 )

    1969-1972 FORD CUSTOM

    • CC: 7030
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 429
    • EngineType: V8 ( 7.0 L / 429 )

    1974 CHEVROLET MONTE CARLO

    • CC: 5737
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: J
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1985 OLDSMOBILE TORONADO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: CALIENTE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1975-1977 CHEVROLET C30 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: SILVERADO
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1970 FORD MUSTANG

    • CC: 7014
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Q
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1975-1980 CHEVROLET C20 SUBURBAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: CUSTOM DELUXE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975 CHEVROLET NOVA

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.3
    • SubModel: POLICE
    • CUI: 262
    • EngineType: V8 ( 4.3 L / 262 )

    1981 PONTIAC BONNEVILLE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1972 PONTIAC GRAND SAFARI

    • CC: 7457
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1968-1969 PONTIAC FIREBIRD

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: 350

    1973 CHEVROLET NOVA

    • CC: 5737
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: T
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977 MERCURY COUGAR

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

    1982 CHEVROLET K10 SUBURBAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: SCOTTSDALE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1968 PONTIAC TEMPEST

    • CC: 5733
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: SAFARI
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1970 MERCURY MARQUIS

    • CC: 7014
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.0
    • SubModel: BROUGHAM
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1969 OLDSMOBILE 442

    • CC: 5737
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1985 PONTIAC FIREBIRD

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1971-1972 CHEVROLET KINGSWOOD

    • CC: 6588
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1976-1980 CHEVROLET CAMARO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: RALLY SPORT
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975 FORD E-250 ECONOLINE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: CHATEAU
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1973-1974 CHEVROLET NOVA

    • CC: 5737
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973 CHEVROLET CAMARO

    • CC: 5737
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: T
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1969 PONTIAC FIREBIRD

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

    1969-1971 CHEVROLET C10 PICKUP

    • CC: 5031
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1981-1985 BUICK LESABRE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: LIMITED
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1979-1980 BUICK LESABRE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • Aspiration: N
    • SubModel: LIMITED
    • Engine Vin: R
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977 PONTIAC GRAND PRIX

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: LJ
    • CUI: 403
    • EngineType: V8 ( 6.6 L / 403 )

    1980 CHEVROLET G30 VAN

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

    1992 CHEVROLET CAMARO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • EngineType: ALL
    • SubModel: Z28 HERITAGE EDITION

    1975-1979 CHEVROLET K10 SUBURBAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: CUSTOM DELUXE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1969-1974 FORD E-100 ECONOLINE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: CLUB WAGON
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1978-1980 OLDSMOBILE CUSTOM CRUISER

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1969 FORD COUNTRY SEDAN

    • CC: 7014
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: P
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1969 MERCURY MARAUDER

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.0
    • SubModel: X-100
    • CUI: 429
    • EngineType: V8 ( 7.0 L / 429 )

    1963-1964 FORD CLUB CARGO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.7
    • SubModel: BASE
    • CUI: 289
    • EngineType: V8 ( 4.7 L / 289 )

    1975-1982 FORD E-150 ECONOLINE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1982-1983 CHEVROLET K20 SUBURBAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: SILVERADO
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 MERCURY COLONY PARK

    • CC: 5753
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1971-1972 FORD MUSTANG

    • CC: 5753
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.8
    • Aspiration: N
    • SubModel: MACH I
    • Engine Vin: Q
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1987 FORD LTD CROWN VICTORIA

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

    1975-1979 CHEVROLET G30 VAN

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: HI-CUBE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1967 CHEVROLET CHEVELLE

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.6
    • SubModel: CONCOURS
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1980-1983 OLDSMOBILE DELTA 88

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1972 CHEVROLET EL CAMINO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1973-1974 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 )

    1988 OLDSMOBILE CUTLASS SUPREME

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

    1977 BUICK CENTURY

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1975-1976 CHEVROLET MONTE CARLO

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: S
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1986 CHEVROLET K30 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: SILVERADO
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975-1977 PONTIAC FIREBIRD

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1988 PONTIAC FIERO

    • CC: 2474
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 2.5
    • SubModel: VALUE LEADER
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1993-1995 FORD MUSTANG

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

    1981-1986 CHEVROLET K10 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 PONTIAC CATALINA

    • CC: 6555
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: BROUGHAM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1988-1990 CHEVROLET C2500 PICKUP

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 5.7
    • SubModel: CHEYENNE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 CHEVROLET BEL AIR

    • CC: 6588
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1964-1967 FORD CUSTOM 500

    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 4.7
    • SubModel: BASE
    • CUI: 289
    • EngineType: V8 ( 4.7 L / 289 )

    1977 PONTIAC GRAND LEMANS

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

    1972-1973 MERCURY MONTEGO

    • CC: 7030
    • Fitment_Note: Requires Machining On Cylinder Heads~50-State Legal
    • Liter: 7.0
    • SubModel: MX
    • CUI: 429
    • EngineType: V8 ( 7.0 L / 429 )

    1976-1978 FORD F-150

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