Cummins has a trust-worthy reputation for rock-solid durability and worry-free performance. The one chink in the armor is the Bosch CP4.2 high pressure pump. In contrast to Cummins, it has a bad reputation for premature failure and destroying the entire high-pressure fuel system with fine metal debris, when it does.
There’s now a refined solution. At the heart of the S&S Diesel Motorsport No Tuning Required 2019+ RAM CP3 Conversion Kit is a brand-new Bosch CP3NH base pump that is internally modified for improved durability, high speed performance, and tuning-free rail pressure control.
The next generation 6.7 L Cummins features many design improvements that make it an excellent choice for competition builds, including a front cover that over-drives the pump at a 1.5:1 ratio. To take advantage of this feature, S&S is offering kits with high-speed optimized competition pumps. Higher pump speed equals higher output, yet there are RPM limits for each size pump.