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Performance RPM and Machine in Idaho Falls did the machining and balancing work on the 6.6L Duramax LB7. It was bored 0.040 over and has Mahle forged pistons and Carrillo connecting rods. The CNC-ported cylinder heads from Industrial Injection have the new, screw-in Torque Lock injector cups that replace the problematic stock pressed-fit versions. The fuel system includes two FASS 260-gph lift pumps supporting dual Industrial Injection CP3 injection pumps and 42-lpm, eight-hole injectors. The PPE compound turbocharger kit consists of Garrett GT45X and Garrett GT55 turbos and has proven reliable for all these seasons. Dmitri’s signature direct-port nitrous system has only been used (so far) to give a small shot of N2O to the engine for lighting the turbocharger.