Isky Cams Valve Spring Shim Kit - 0.010/0.015/0.020/0.030" Thick - 1.250" OD - Steel 016439NRSI Flowmaster's race-oriented Outlaw Cat-back systems

Flowmaster's race-oriented Outlaw Cat-back systems are designed to mount behind the factory catalytic converters for 50 state emissions legality

2-1/4 in Tailpipes

000 in ID Coil-Over Springs

GM Fullsize Truck 1973-76

Isky Cams Valve Spring Shim Kit - 0.010/0.015/0.020/0.030" Thick - 1.250" OD - Steel 016439NRSI Flowmaster's race-oriented Outlaw Cat-back systemsProduct Description: Valve Spring Shim Kit 0. 010 0. 015 0. 020 0. 030 in Thick 1. 250 in OD Steel As the world's largest racing, performance, and economy cam manufacturer, Isky maintains a dynamometer testing program for constant improvement of camshaft and valve train design. These tests are conducted daily in Isky's new enlarged dyno facility. To properly evaluate and prove the efficiency of Isky racing cams and valve train components, Isky