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Valve Train

Crower has over 8000 listed high performance engine parts available for race, street, marine, diesel, truck, motorcycle, offroad
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  6. Valve Springs Valve Springs  0.630 in. ID – 1.274 in. OD – 0.750 in. Max Valve Lift (Set of 16) #PAC-1238X
    Valve Springs Valve Springs  0.630 in. ID – 1.274 in. OD – 0.750 in. Max Valve Lift (Set of 16) #PAC-1238X
    SKU: 68437-16

    Valve Springs  0.630 in. ID – 1.274 in. OD – 1.800 in. installed Height – 0.750 in. Max Valve Lift (Set of 16)

    PAC Racing’s RPM Series Dual Valve Springs  #PAC-1238X are constructed using our signature PACaloy super clean wire and are heat-treated in-house for precision spring rates and improved strength. They also receive a multi-peen process, polishing, and a Nano-Peen™ proprietary surface treatment for service life optimization. These springs fit GM Gen III/IV LS engines with specific part numbers for stock heads and aftermarket heads.

    • Built using our signature PACaloy super clean wire to ensure strength and durability
    • In-house heat-treating for precise spring rates and increased strength
    • Multi-peen process to optimize service life
    • Polishing to improve operating cycles
    • Nano-Peen™ proprietary surface treatment
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