Description
COMP Cams H604-16 – GM 603/604 0.570in Lift 1.077/1.282 OD Beehive Hustler Valve Spring Kit
Valve Spring – Ovate Beehive Spring – 386 lb/in Spring Rate – 1.181 in Coil Bind – 1.077 in / 1.282 in OD – Set of 16
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.
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.
C.A.R.B. Exemption Reason: No impact on pollution output of vehicle.C.A.R.B. E.O. Number: N/ANumber of Springs: 1Compatible Shims: 4753Spring Style: BeehiveValve Spring Series: Performance StreetDamper: NoCompatible Titanium Retainer: 722-1Compatible Tool Steel Retainer: 1772-1Compatible Chromemoly Steel Retainer: 774-1Compatible Spring Seat / Seals: 528-KITSpring Rate: 386Top Outside Diameter: 1.077Open Load: 304Seat Pressure: 92Installed Height: 1.8Coil Bind Height: 1.181Bottom Inside Diameter: 0.86Bottom Outside Diameter: 1.282Top Inside Diameter: 0.655C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: Yes, but must be a race/competition only vehicle.C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: Yes, but must meet tailpipe emission standards for year of vehicle.C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.C.A.R.B. Exempt for On-Road Vehicles?: Yes
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