New Parts launched for GM Duramax, Dodge/Ram Cummins and Ford Powerstroke

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Protect the Fuel System That Can Bankrupt a Build

The CP4.2 pump is the Achilles heel of the 6.7L Powerstroke — when it fails it sends metal debris straight through the injectors, rails, and lines, and that's commonly a $10,000+ repair. A CP4 disaster-prevention bypass reroutes the pump's case fuel through a filter so a failure is caught instead of grenading the whole high-pressure system. It's cheap insurance. We also carry the billet L5P fuel filter cap that replaces the cracking factory plastic, dual fueler and filter-conversion kits, and Cummins injector lines.

Fits these trucks

  • Ford 6.7L Powerstroke — CP4 disaster-prevention bypass kit, dual fueler kit, fuel filter conversion kit
  • GMC/Chevy L5P 6.6L Duramax — billet aluminum fuel filter cap
  • GMC/Chevy 6.6L Duramax (2001–2016) — fuel primer bulb sealing kit
  • Dodge/Ram 5.9L Cummins — 6x fuel injector line set

Frequently Asked Questions

Why is the 6.7 CP4 pump a problem?
It's the known weak point of the 6.7L fuel system. When the CP4 fails it pushes metal debris into the injectors, rails, and lines — usually a several-thousand-dollar repair of the entire high-pressure system.
What does a CP4 disaster-prevention bypass do?
It reroutes the pump's case/return fuel through a dedicated filter, so if the CP4 fails the debris is caught instead of destroying your injectors and rails. It doesn't stop the pump failing — it limits the damage to a pump instead of the whole system.
Why a billet L5P fuel filter cap?
The factory plastic cap cracks and leaks. A billet aluminum cap fixes it for good.
What's a dual fueler kit?
It adds a second fuel pump for higher-demand builds that out-flow the single factory CP4.
Will it fit my truck?
Match the year and engine on the product page. Get the right part the first time.