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PPE OEM Length Replacement High Flow Up Pipes For 17-19 L5P Duramax

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50 State Legal50 States Emissions Legal (E.O. Pending)


GM trucks equipped with the L5P diesel are a modern marvel of engineering and design. They're a winning combination: a powerful workhorse, with low emissions, and great styling. Unfortunately, they have been outfitted with undersized, restrictive stock up-pipes.


Now you can upgrade the L5P to achieve higher-flow by bolting on PPE OEM-Length Replacement High-Flow Up-Pipes. These direct replacements have a 46% larger flow area over stock, which results in a deeper-breathing power-plant, while maintaining the mandated Federal emissions standards of stock.


The PPE OEM-Length Up-Pipes are manufactured from 11 gauge 304 stainless steel. These new Up-Pipes include the superior PPE internally-sleeved bellows, also manufactured from 304 stainless steel.


This system is engineered to take the abuse of high temperatures and high pressures, while promoting increased exhaust flow and lower EGTs. A superior product for your modern marvel.


GM Equivalent P/N's:

  • 12676611
  • 12688021



  • 46% larger flow area over stock
  • Manufactured from 11 gauge 304 stainless steel
  • 304 stainless steel, internally-sleeved bellows
  • Direct bolt-on replacement
  • Includes 301 stainless steel gaskets



  • 2017-2021 Chevy Silverado 2500HD/3500HD 6.6L L5P Duramax Diesel
  • 2017-2021 GMC Sierra 2500HD/3500HD 6.6L L5P Duramax Diesel


  • 116122000
  • 116122000
  • 840171209570
  • PPE
  • New

Shipping Information

  • Item Requires Shipping
  • 12.0 lbs.
  • W24.0000” x H15.0000” x L6.0000”
  • FREE Ground Shipping


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