Brian Tooley BTR .685" Dual Spring kit with Titanium Retainers

Fits 1997-2013 LS Based Gen 3/4 Engines

When you decide to take a walk on the wild side and exceed the .660” limit of most popular spring kits, the next step is BTR's .685” Spring Kit. A higher spring rate and titanium retainers will ensure valvetrain stability with radical camshafts. This kit does NOT fit LS9 engines. LS7 engines will require shims. 

The kit includes: Dual .685" springs, titanium retainers, locating seats for stock valve guides, seals, and locks. 

•170 lbs @ 1.800"

•380 lbs @ 1.180"

•450 lbs @ 1.115

•Coil bind @ 1.000"

LS1 LS2 LS3 LS6 LM7 L33 LFA LSA LH6 LQ4 LQ9 L76 L92 L99 L96 LC9 LY6 LMG LH8 LR4 LM4 L59 L77