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11-15 GM Duramax MBRP Installer Series 4" Stainless DPF Race Pipe

11-15 GM Duramax P1 Installer Series 4" Stainless DPF Race Pipe



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Give your 2011-2015 GM 6.6L Duramax the competitive edge with the P1 Race Parts CGMS9426 4" Installer Series Competition Race Pipe. P1 Race Parts Competition Series Race Pipes are built from aluminized steel and come complete with OE style hangers and clamps for an easy installation. This 4" Race Pipe provides maximum flow for your purpose-built, race truck. 


  • No Sensor Bungs
  • 4" Stainless Steel 
  • OE Style Hangers For Easy Installation 
  • Maximum Flow For Competition Applications

Note: This free-flow race pipe requires the use of an aftermarket performance programmer with off-road tuning. This product fits 2500HD/3500HD Pickups. It is not intended for use on Cab & Chassis applications. 


This product may defeat emissions systems via electronic or mechanical means and is STRICTLY  for off-road use only. According to the EPA Clean Air Act, it is illegal for use on any Federal, State, or Local public highways and illegal use is punishable by the penalties enacted by the mentioned laws. We do not condone illegal use of these products, and a Liability waiver must be filled out, signed, & returned before this item will ship. Click here for Online Liability Waiver or here for Fax/Email Liability Waiver. We do NOT accept returns on ANY emissions defeating electronics or equipment. NO EXCEPTIONS! This item CANNOT be shipped to California.

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