The Compound PhatShaft turbos for the Cummins 5.9L are offered in two different kits, Towing and Racing.  Compound PhatShaft towing turbos are built with a PhatShaft 62 as the primary charger with the K31 as the secondary charger. Both the primary and secondary turbo’s on the towing Compounds are wastegated for ultimate control of boost and back pressure.  This unique combination offers quick spool up and unmatched towing capabilities. The Compound PhatShaft racing turbos are built with a Silver Bullet as the primary turbocharger and a modified Big Brother as the secondary charger.  The racing compouns are a perfectly matched set of turbo's for over 800HP

	PhatShaft Towing Compounds PhatShaft towing compounds are built with a PhatShaft 62 as the primary charger with the K31 as the secondary charger. Both the primary and secondary turbo’s on the towing Compounds are wastegated for ultimate control of boost and back pressure.  This unique combination offers quick spool up and unmatched towing capabilities.
	PhatShaft Racing Compounds The Phat Shaft racing twins feature the 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 800HP