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.
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.
Information:
Available in a set of 16 under H604-16
Application Summary:
| Year |
Make/Model |
| Designed |
for use on GM 604 and CT525 Crate Engines. Also fits all GM LS engines including truck engines, excluding LS7. |
| Attributes |
| Bottom Inside Diameter |
0.86 |
| Bottom Outside Diameter |
1.282 |
| C.A.R.B. E.O. Number |
N/A |
| 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. |
| California Proposition 65 |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| 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 |
| Country of Origin (Primary) |
US |
| Damper |
No |
| Emission Code |
Legal US |
| Harmonized Tariff Code (Schedule B) |
8409914000 |
| Hazardous Material Code |
N |
| Installed Height |
1.8 |
| Life Cycle Status Code |
Available to Order |
| NAFTA Preference Criterion Code |
B |
| Number of Springs |
1 |
| Open Load |
304 |
| SDR Required Flag |
N |
| SDS Sheet Number |
N/A |
| Seat Pressure |
92 |
| Spring Rate |
386 |
| Spring Style |
Beehive |
| Top Inside Diameter |
0.655 |
| Top Outside Diameter |
1.077 |
| Valve Spring Series |
Performance Street |
| Warranty Time |
12 |
| GTIN |
00036584409472 |
