Brian Tooley Racing valve spring kits in ALL of our GPI Camshaft Packages for one reason: QUALITY! We haven’t seen a single failure out of a BTR valvespring since their conception in 2005!
This .660″ Lift Dual Spring Kit (#SK001 or #SK001S) is PERFECT for All LSx engines using stock rocker arms. Includes dual polished springs and your choice of matching tool steel or titanium retainers. Also included is locators for stock or bronze guides, locks, and seals.
One of our favorite aspects of this spring kit is that the standard retainer is the lightest steel retainer made for 1.300″ dual springs, only weighing 13.9 grams or 16.4 grams with locks. Those looking for the lightest valvetrain possible should upgrade to the optional titanium retainers available at checkout, which are the lighest available for LSx dual springs weighing in at 8.5 grams, or 11 grams with locks.
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.
This kit WILL fit LS7 Engines with the proper amount of shim, which you can include as an option during checkout!