The BTR platinum spring kit would be inducted into the LS aftermarket hall of fame if such a thing existed. Whether you?re putting together a daily driver with a mild cam, a 600 hp N/A stroker, or a turbocharged 1000 hp brawler, our platinum spring kit will make sure your valves are right where your cam wants them to be at all times. They are designed to be used with stock rocker arms. The kit includes: SP001-1 dual polished spring (qty 16) VL7 8MM-1 locks (qty 32) Titanium retainers (qty 16) Locators for stock (SL505060-1) guides (qty 16) VS LS valve seals (qty 16) Spring specs are as follows: 155 lbs @ 1.780" 380 lbs @ 1.180" 400 lbs @ 1.130 Coil bind @ 1.070" ****NOT FOR USE IN LS7 APPLICATIONS
