S&S Diesel Duramax High Pressure CP3 Pump - 01-16Duramax CP3 New LB7, LLY, Dual CP3 Kits No tuning required when proper model selected. Duramax SuperSport CP3 New (higher output >3,500 rpm) Duramax 10mm CP3 New (1,325 mm3 rev displacement)Duramax 10mm High Speed CP3 New (1,325 mm3 rev displacement, high speed optimized) Duramax 12mm CP3 New (1,590 mm3 rev displacement)Duramax 12mm High Speed CP3 New (1,590 mm3 rev displacement, high speed optimized)Duramax 12mm High Speed CP3 New (1,590 mm3 rev