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COMP Cams H604-16 - GM 603/604 0.570in Lift 1.077/1.282 OD Beehive Hustler Valve Spring Kit

COMP Cams H604-16 - GM 603/604 0.570in Lift 1.077/1.282 OD Beehive Hustler Valve Spring Kit

COMP Cams | H604-16
SKU: COMP-H604-16
$356.95 USD
$392.64 USD $356.95 USD
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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.

Number of Springs: 1
Compatible Shims: 4753
Spring Style: Beehive
Valve Spring Series: Performance Street
Damper: No
Compatible Titanium Retainer: 722-1
Compatible Tool Steel Retainer: 1772-1
Compatible Chromemoly Steel Retainer: 774-1
Compatible Spring Seat / Seals: 528-KIT
Spring Rate: 386
Top Outside Diameter: 1.077
Open Load: 304
Seat Pressure: 92
Installed Height: 1.8
Coil Bind Height: 1.181
Bottom Inside Diameter: 0.86
Bottom Outside Diameter: 1.282
Top Inside Diameter: 0.655
C.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. E.O. Number: N/A
C.A.R.B. Exemption Reason: No impact on pollution output of vehicle.
C.A.R.B. Exempt for On-Road Vehicles?: Yes
C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
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