BTR. 660 Dual Valve Spring Kit Titanium Retainer 4.8/5.3/6.0/LS1/LS2/LS3

BTR PLATINUM LS DUAL SPRING KIT. 660 LIFT – SK001. 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 […]