If you own a 2011+ 6.7L Powerstroke, you've probably read plenty about the factory CP4 high-pressure fuel pump. The RCD Performance CPX is one of the options for dealing with it, and it takes a different approach than a pump swap.
What the CPX is
The RCD Performance CPX Injection Pump is a modified CP4-style pump built as a direct drop-in replacement for 2011-2027 6.7L trucks. According to RCD, no aftermarket fuel lines or additional modifications are needed to install it, and it comes with a 24-month replacement warranty.
What RCD says it changed
RCD's listing points to two main changes:
- Pinned lifter buckets to stop the roller lifters from rotating. RCD identifies lifter rotation during a vacuum event (a fuel gel, a filter change, or a low-pressure feed issue) as the root cause of failures.
- A redesigned feed port and internal fuel return to the tank, so debris from a failure is sent back to the tank instead of toward the injectors. RCD says this means a separate disaster prevention kit isn't needed with this pump.
RCD also notes that the CPX keeps the OEM pumping pattern of four pumps per engine revolution, compared with two per revolution on eccentric-style pumps.
Three output levels
- Stock output, matching the updated 15-19 pump (7.5mm)
- 25% over for tuned trucks (9.5mm)
- 40% over (10.5mm)
If you run a hot tune on a 2011-2014 truck, the larger-output versions are aimed at keeping rail pressure where it needs to be. Variants are also split by model year (2011-2019 or 2020+), so check your year before ordering.
How it compares to your other options
There are three common routes for a CP4 problem, and we carry all of them:
- Protect the stock pump with a prevention kit
- Replace the pump design with the S&S CP4 to DCR Conversion or the SPE CP3 Conversion Kit
- Rebuild the CP4 design with fixes, which is the CPX approach
Which is right depends on your budget, your power level, and how you use the truck. For the full comparison, read our CP4 failure guide.
Not sure which version fits your truck? Message us with your model year and tune level and we'll help you pick.