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Description
The COMP Cams Hustler Valve Spring is an improved version of the popular GM LS6 "blue" valve spring. It's based on the 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. An excellent performance upgrade in GM 603/604 and CT525 LS crate Race Applications with tight rules packages.
Specifications
| Bottom Inside Diameter | 0.86 |
|---|---|
| Bottom Outside Diameter | 1.282 |
| 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 Federally Certified Vehicles Manufactured Before 1967? | 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 |
| 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. Exemption Reason | No impact on pollution output of vehicle. |
| Coil Bind Height | 1.181 |
| Compatible Chromemoly Steel Retainer | 774-1 |
| Compatible Shims | 4753 |
| Compatible Spring Seat / Seals | 528-KIT |
| Compatible Titanium Retainer | 722-1 |
| Compatible Tool Steel Retainer | 1772-1 |
| Damper | No |
| Installed Height | 1.8 |
| Number of Springs | 1 |
| Open Load | 304 |
| Seat Pressure | 92 |
| Spring Rate | 386 |
| Spring Style | Beehive |
| Top Inside Diameter | 0.655 |
| Top Outside Diameter | 1.077 |
| Valve Spring Series | Performance Street |
| UPC / GTIN | 00036584409472 |