Need a valve spring that will support up to .750" of lift? Look no further! This spring kit contains the following: PAC #1208X Dual Valve Springs Matching titanium retainers your choice of locators for stock or bronze guides locks seals Spring Specs are 160 lbs @ 1.800", 482 lbs @ 1.100", Coil Bind 1.000", Max Lift .750"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. This kit WILL fit LS7 Engines with the proper amount of shim, which you can include as an option during checkout here at Tick Performance!