BOSCH CP4.2:

A COMPACT, EFFICIENT PLATFORM THAT’S HERE TO STAY While most of us know the Bosch CP4.2 because it’s what came on our LML Duramax or 6.7L Power Stroke, this high-pressure fuel pump has been around a while. With 39,000 psi (2,700 bar) capability, the CP4 can meet even the most stringent

diesel emission standards, and it’s been used in conjunction with both piezo and solenoid style injectors in dozens of passenger car makes and models all over the world. To date, more than 40 million CP4’S have been produced, with its modular design allowing Bosch to grow (CP4.2) or scale down the pump (CP4.1) based on the OE’S fuel system requirements and packaging needs.

The Bosch CP4.2 debuted in the North American truck segment back in 2011 on both the 6.7L Power Stroke and the LML Duramax, although a similar version (CP4.1) had already been brought to other markets such as Volkswagen, BMW, and more than 20 other brands, globally. Fast-forward eight years and it’s in use in most diesel engines in the truck world. Though GM moved on to the Denso HP4 pump for its L5P Duramax in ’17, you can still find the CP4.2 aboard the aforementioned 6.7L Power Stroke, the 3.0L VM Motori Ecodiesel in Ram 1500’s, the 5.0L Cummins in the Nissan Titan XD, and now even the new 6.7L Cummins uses one. One thing’s for sure: this pump isn’t going anywhere any time soon.