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GM/Chevy 3.5" Downpipe L5P Duramax | 2017-2023

GM/Chevy 3.5" Downpipe L5P Duramax | 2017-2023

Regular price $449.00 USD
Regular price Sale price $449.00 USD
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Vehicle Fitment:
2017, 2018, 2019, 2020, 2021, 2022, 2023 Chevrolet Silverado & GMC Sierra 2500 & 3500HD 6.6L Duramax L5P pickup trucks


Description: This 3.5" turbocharger downpipe (also known as the turbo direct pipe) will remove the DOC and increase exhaust flow out of the turbo, improving performance.  There are other versions of this pipe that start behind the Diesel Oxidation Catalysts, leaving it installed for emissions-on setups but this pipe will fully remove the DOC for the best airflow and power gains. Both DPF delete pipes, and full exhaust systems do not include a DOC delete, this pipe is needed to fully remove your emissions but isn't required for a delete tune. 


  • 3.5" Stainless Steel Piping
  • 20% better flow than the factory pipe
  • Heat wrap included keeping engine bay temperatures down
  • Greater heat-retention
  • Will not affect emissions systems
  • Maximum flow for competition applications
  • 4-bolt flange, two studs installed
  • Completely eliminates the DOC


* Note: Alaska, Hawaii and some Canadian locations will be subject to additional freight charges



We will process your order within 1 business day. Standard shipping will take 4-8 business days. If the kit is out of stock, we accept back orders, but keep in mind your order may take a few weeks to ship. 

* Note: Alaska, Hawaii and some Canadian locations will be subject to additional freight charges

30 Day Return Policy

We accept returns within 30 days of you receiving the kit, so long as the kit is unused. Once the kit is installed, we no longer accept returns. Buyer is responsible for return shipping & restocking fees. If your kit was damaged in transit, please contact our team at

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