660" Lift Platinum Spring Kit with Tool Steel Retainers

Spring specs are 155 lbs @ 1.780", 380 lbs @ 1.180", 400 lbs @ 1.130, coild 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 LSA. This kit will not fit LS9 engines. SK001S