This spring kit contains PAC 1207X Dual Valve Springs, matching titanium retainers, your choice of locators for stock or bronze guides, locks, and seals.
Spring Specs are 155 lbs @ 1.800, 436 lbs @ 1.150, Coil Bind 1.000″, Max lift .700″
This is a drop in spring kit for all 15 degree LS heads including: LS1, LS2, LS3, LS4, LS6, L76, L92, L99, LQ4, LQ9, L33, LSA…etc. This kit will not fit LS9 engines. It will fit LS7 heads with the proper amount of shims.