COMP Cams · New
COMP Cams GM 603/604 0.570in Lift 1.077/1.282 OD Beehive Hustler Valve Spring Kit
MPN H604-16 · Store SKU ccaH604-16
Supplier stock checked 11/7/2026, 2:13:46 PM UTC. Adding a part does not reserve it.
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Product details
COMP Cams Hustler Valve Springs are an improved version of the popular GM LS6 "blue" valve spring. They are based on popular GM part #12499224 and #12565313 LS6 springs but with 4% higher seat and open loads for better dynamic control, as well as an extra .020" of lift capability. They are an excellent performance upgrade in GM 603/604 and CT525 LS crate Race Applications with tight rules packages. Visually identical to the blue LS6 springs, Hustler Beehive Springs add 4% higher load than stock for better valve control over stock. This spring delivers an advantage in circle track racing for those willing to bend the rules. Beehive Hustler Springs for GM 604/CT525 LS Crate Engine
Manufacturer fitment & guides
Check H604-16 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
