BTR: LS9 .660 Double Spring Kit [C6 Corvette ZR1, LS9] dod ProCharger has a supercharger head

ProCharger has a supercharger head unit ready to support whatever power level you desire

Looking to make more efficient positive displacement supercharged power and more aggressive lope (increasing by stages below) in your C7 Corvette Z06

lines must fill

All EBC Red Stuff Brake Pads feature a center-line slot that vents heat and gas to prevent thermal cracks and fade

4AN Adapter Fitting

BTR: LS9 .660 Double Spring Kit [C6 Corvette ZR1, LS9] dod ProCharger has a supercharger headDetails . 660" Lift Dual Spring Kit for LS engines using stock rocker arms. Includes dual polished springs, matching titanium retainers, your choice of locators for stock or bronze guides, locks and seals. 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 LS9 engines, will not fit other LS engines. Locator STANDARD SIZE, Stock Guides . 505" ID . 060" Thick