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The Brian Tooley Racing .660" Lift Dual Spring Kit is for all LSX engines using stock rocker arms. Includes dual polished springs, titanium retainers, 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 the following engines: LS1, LS2, LS3, LS4, LS6, L76, L92, L99, LQ4, LQ9, L33, and LSA. This kit will not fit LS9 engines.

P/N SK001