.660" Lift Dual Spring Kit for LS9 engines using stock rocker arms. Includes dual polished springs, locks and your choice of:
- Titanium Retainers
- Locators for Stock or Bronze Guides
- Valve Seals
Includes dual polished springs, matching titanium retainers, your choice of locators for stock or bronze guides, locks and seals. Spring specs are 155 lbs @ 1.780", 380 lbs @ 1.180", 400 lbs @ 1.130, coil bind @ 1.070" This is a drop in spring kit for LS9 engines, will not fit other LS engines.