2003-2004 Cummins Phatshaft 64 Turbo (364240651A)

The PhatShaft 64 is a 64mm-compressor turbocharger for the 2003-2004 5.9L Common Rail Cummins, built for quick spool and strong low-end response while still pulling overall torque at full throttle. The wastegate is preset at 45 psi to help protect head gaskets.

It's available with either a 12cm or 14cm turbine housing matched to a 65mm turbine. The 14cm housing trades a touch of response for lower exhaust gas temperatures and pairs better with heavier fueling — larger injectors, an aggressive cam plate, and high-rev governor springs.

• 64mm compressor with extended-tip technology
• 65mm turbine, 12cm or 14cm housing options
• Dual-grooved high-performance journal bearings
• Wastegate preset at 45 psi
• Includes adjustable boost elbow

• 2003-2004 trucks require an HX40-style downpipe — see our HX40DP3 Downpipe.
• 14cm housing trades a slightly slower spool response for lower EGTs.