All Phat Shaft turbochargers are designed as a direct drop in replacement for the Dodge 5.9L Cummins stock turbo. Industrial Injections unique ability to test and perfect the Phat Shaft is what sets the Phat Shaft apart from the rest of the industry. Not only do we have the ability to create the Phat Shaft chargers in house, we have the unique ability to fuel our own test vehicles with our state of the art fuel injection shop. This exclusive ability ensures our customers unmatched satisfaction that they are getting what they pay for and that we are not doing our testing on our customers trucks.

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The Phat Shaft Twins for the Cummins 5.9L are offered in two different kits, towing twins and racing twins.  Phat Shaft towing twins are built with a Phat Shaft 62 as the primary charger with the K31 as the secondary charger. Both the primary and secondary turbo’s on the towing twins are wastegated for ultimate control of boost and back pressure.  This unique combination offers quick spool up and unmatched towing capabilities.

        The Phat Shaft racing twins feature a modified Silver Bullet as the primary turbocharger and a modified Big Brother as the secondary charger.  The racing twins are a perfectly matched set of turbo's for over 700HP

Check out the Duramax LLY, LBZ and LMM twin turbo kits that support 650 hp and 1100 lbs. of torque.  The complete kit utilizes stock vgt turbo compound with the BorgWarner S400.  For more boost, lower egt's, and quicker spool up, nothing beats the Industrial Injection Duramax twins.