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

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Fix the Cracking Plastic, Seal the Primer

The L5P Duramax's factory plastic fuel filter cap cracks and leaks — a billet aluminum cap fixes it for good. The primer bulb sealing kit restores a proper seal on the older Duramax fuel system. Small parts that stop fuel leaks and hard starts.

Fits these trucks

  • 2017–2024 GMC/Chevy L5P 6.6L Duramax — billet aluminum fuel filter cap
  • 2001–2016 GMC/Chevy 6.6L Duramax — fuel primer bulb sealing kit

Frequently Asked Questions

Why a billet L5P fuel filter cap?
The factory plastic cap cracks and leaks. A billet aluminum cap fixes it permanently.
What does the primer seal kit do?
It restores a proper seal on the older Duramax fuel primer system to stop leaks and hard starts.
Will it fit my truck?
The billet cap fits the L5P (2017–2024); the primer kit fits 2001–2016 Duramax. Match your year on the product page. Get the right part the first time.