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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 compounds are a perfectly matched set of turbo's for over 800HP Freight costs calculated are for regular shipping within the continental US. If you want faster delivery, let us know and we'll quote you an expedited shipping cost before we charge your card.PHATSHAFT TOWING COMPOUNDS 2ND GEN 350-700 HP 62/K31 PHATSHAFT RACING COMPOUNDS 2ND GEN 350-700 HP SLIVER BULLET/ BIG BRO 1000+HP PHATSHAFT TOWING COMPOUNDS 3RD GEN 62/K31 DODGE 350-700 HP* PHATSHAFT RACING COMPOUNDS 3RD GEN 350-700 HP SLIVER BULLET/ BIG BRO 1000+HP* * 3 PIECE MANIFOLD (2nd gen) REQUIRED FOR ALL 3RD GEN TWINS |