Be sure to check flange before ordering!! This kit is for V-Band flange at downpipe.



  • 4″ T304 Stainless Steel
  • Polished T304 Exhaust Tip
  • Free-Flowing Performance Muffler
  • Downpipe-Back Race Exhaust System
  • Lifetime Warranty
  • NOT Available for sale in the State of California

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The Best Systems Start with the Best Materials
Maximize performance in your race built 2011-2015 GM 6.6L Duramax LML with the P1 Race Parts C6044304 4″ Pro Series Downpipe-Back Competition Exhaust. Constructed from T304 stainless steel, the Pro Series delivers optimal durability. Easy to clean up and maintain, this is the perfect exhaust system for show trucks, lifted applications, and for those who only choose the best.
Built to Perform
With P1 Race Parts Competition pipes you will never have to worry about your exhaust system being the weak link in winning that checkered flag. Mandrel bent tubing, the lowest bend degree angles and extensive dyno tuning guarantee you maximum exhaust flow, maximum horsepower, maximum torque and minimum exhaust gas temperatures.
Easy Installation
P1 Race Parts systems are as much fun to install as to drive with on your truck. Bolt-on, no weld design makes installing this on your truck a no hassle project. Everything is direct fit to the OEM hangers and you get all the clamps and parts you will need, all in one box, no matter what configuration of truck you have.
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Please verify the fitment of this product before ordering. All Electronic Items are Non-Refundable.
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This product is designed and manufactured for use only on competition motor vehicles participating in sanctioned closed-course, off-road, competitive Racing. Use of this product on Motor Vehicles that are licensed and registered to drive on public roads and highways is prohibited. By accepting this you agree that this product will not be used on a registered motor vehicle for highway use. Also, agreeing to this you take for responsibility for your actions and not hold Blood Diamond Motorsports liable for unlawful use of this product.
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