Cummins Valve Lifter, 3947759

Fits 2003 - 2013 year Cummins 3.9L, 4.5L, 5.9L, 6.7L ISB Engines
replaces: 3947759

Our Lifters/Tappets are designed for extreme performance and quiet valve train operation. We offer a wide range of designs including flat bottom lifters and roller design lifters. Valvetrain geometry and accuracy are the key to improved fuel economy and overall engine performance. Our lifters are manufactured from the finest materials and maximum hardness for a long reliable life.