Straub Technologies Valve Spring Shim - 0.060 in Thick - 1.300 in OD - 0.520 in ID - GM LS-Series (Set of 50) R040002L Change the launch rpm limit

Change the launch rpm limit (2-Step) on the fly

Ultra-lightweight design: 420g/m2

port holes on each cover and a fill bung with billet cap on the front of one cover

2" bracket that can be used with filter P/N 12301

Straub Technologies Valve Spring Shim - 0.060 in Thick - 1.300 in OD - 0.520 in ID - GM LS-Series (Set of 50) R040002L Change the launch rpm limitProduct Description: Valve Spring Shim 0. 060 in Thick 1. 300 in OD 0. 520 in ID Steel GM LS Series Set of 50 With 25 years of experience in the performance industry, Straub Technologies has built relationships with many of the top companies. Our ability to source, design, and sell products to satisfy the performance needs of industry giants and grassroots racers alike has built our reputation as the go to source in the performance industry.