S&S SuperSport Replacement CP3 Injection Pump is recommended for applications up to 500HP on Common Rail 5.9L and 6.7L Cummins applications. For best performance use a 150 GPH or higher lift pump. This modified CP3 offers higher output above 3,500 RPM where an OEM pump falls off around 3,000 RPM. Based off of an 6.7L Pump. Custom tuning is required. No Core Fee.