For those 2003-2004 Cummins with moderate fueling upgrades and pushing 475-500 horsepower, a 64mm turbo upgrade is an excellent choice to deliver superb airflow with quick spooling characteristics, and this Viper series is hard to pass up.

IMPORTANT NOTE:

• Requires HX40 Downpipe (not included)

The VIPER PhatShaft 64 was designed to handle mild to aggressive fueling upgrades to increase overall performance. The Viper comes equipped with an extended tip 63mm forged milled compressor wheel and 360 degree thrust bearing. The Viper utilizes a 68mm turbine wheel and a 14 cm exhaust housing in which they modify the angle of the exhaust nozzle, maximize the wastegate ports, and enlarge the wastegate chamber for full wastegate travel. Like all PhatShaft turbochargers, it is equipped with dual grooved high performance bearings and an adjustable boost elbow.