Brian Tooley Racing BTR Dual Springs .660" Platinum
This very popular Spring Kit is highly recommended when upgrading to a aftermarket Camshaft
.660" Lift dual springs set of 16 for LS engines using stock rocker arms. BTR's .660” lift Platinum Springs are the most popular dual springs in our lineup, and for good reason! Whether you’re putting together a rowdy stroker motor or are applying additional pressure via forced induction, the Platinum Springs are up to the task of controlling your valvetrain.
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 all 15 degree LS heads including LS1 LS2 LS3 LS4 LS6 L76 L92 L99 LQ4 LQ9 L33 LSA.