• Comp Cams 3/8 Single Groove Lock
  • Comp Cams 3/8 Single Groove Lock
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COMP Cams

Comp Cams 3/8 Single Groove Lock

Comp Cams 3/8 Single Groove Lock

$53.55 USD
$53.55 USD
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  • Free fitment check before you order

3/8 SINGLE GROOVE LOCK by COMP Cams. Check the part number and details below against what you are replacing. Springs are matched to the cam lift and rpm range, so they are often changed with a cam.

Quick facts

  • Brand: COMP Cams
  • Part type: Valve spring set

Listed fitment

  • 1966 - 1967 American Motors Ambassador 990
  • 1966 - 1970 American Motors Ambassador Base
  • 1971 - 1974 American Motors Ambassador Brougham
  • 1966 - 1971 American Motors Ambassador DPL
  • 1968 - 1972 American Motors Ambassador SST
  • 1967 - 1968 American Motors American 440, Base, Rogue
  • 1968 - 1979 American Motors AMX Base
  • 1966 American Motors Classic Base, 770
  • 1978 - 1979 American Motors Concord Base
  • 1979 American Motors Concord Limited, DL
  • 1972 - 1976 American Motors Gremlin Base
  • 1976 American Motors Gremlin Custom
  • 1977 American Motors Hornet AMX
  • 1970 - 1977 American Motors Hornet Base
  • 1971 American Motors Hornet SC/360
  • 1971 - 1977 American Motors Hornet Sportabout
  • 1970 - 1972 American Motors Hornet SST
  • 1971 - 1974 American Motors Javelin AMX
  • 1968 - 1974 American Motors Javelin Base
  • 1968 - 1972 American Motors Javelin SST
  • 1970 American Motors Javelin SST Trans Am, SST Mark Donohue
  • 1966 - 1967 American Motors Marlin Base
  • 1971 - 1978 American Motors Matador Base
  • 1974 American Motors Matador Brougham, X
  • 1978 American Motors Pacer Base
  • 1979 American Motors Pacer DL, Limited
  • 1969 American Motors Rambler Hurst SC/Rambler, 440, Base, Rogue
  • 1968 American Motors Rebel 550
  • 1967 - 1968 American Motors Rebel 770
  • 1967 - 1970 American Motors Rebel Base, SST
  • 1970 American Motors Rebel The Machine
  • 1979 American Motors Spirit Base
  • 1965 - 1975 Chevrolet Bel Air Base
  • 1965 - 1972 Chevrolet Biscayne Base
  • 1973 Chevrolet Blazer Base
  • 1972 Chevrolet Brookwood Base
  • 1978 - 1980 Chevrolet C10 Big Ten
  • 1975 - 1980 Chevrolet C10 Custom Deluxe, Silverado, Cheyenne, Scottsdale, Custom
  • 1968 - 1974 Chevrolet C10 Pickup Base
  • 1968 - 1974 Chevrolet C10 Suburban Base
  • …and 297 more

Tip: Check installed height and coil bind against the spec from the brand before you start the engine.

View full details

Before you order: fitment and what to plan

Valve springs close the valves and keep them following the cam at high rpm.

Fitment notes

  • Specs, lead time and warranty come from COMP Cams and can change. The details above this guide are the latest we have.

Not sure it fits? Send us your year, make, model, engine and trim and we'll check before you order.

Ask about fitment

Plan the whole job

More for your car: All Valve Springs · Engine

Questions about valve springs

Will this fit my car?
Check the title and details above for the vehicles and part number it is listed for. If you are not sure, contact us with your year, make, model, engine and trim and we will confirm fitment before you order.
Do I need new springs with a new cam?
If the new cam has more lift, usually yes. Match them to the cam card.
Where do specs and warranty details come from?
From COMP Cams. Each brand sets its own specs, lead times and warranty terms, and they can change. The product details above are the latest we have.
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All COMP Cams