.685" Lift Dual Spring Kit for LS engines using Limited stock rocker arm setups and Roller Rockers. Includes dual springs, matching titanium retainers, locators for stock guides, locks and seals.
Spring specs: 170 lbs @ 1.800", 380 lbs @ 1.180", 450 lbs @ 1.115, coil bind @ 1.000" This is a drop in spring kit for LT1/L83/L86 engines.
Note: This kit will not fit LT4 engines.
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