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

Features:
46% larger flow area over stockManufactured from 11 gauge 304 stainless steel304 stainless steel, internally-sleeved bellowsDirect bolt-on replacementIncludes 301 stainless steel gaskets

Fitment:
2017-2021 Chevy Silverado 2500HD/3500HD 6.6L L5P Duramax Diesel2017-2021 GMC Sierra 2500HD/3500HD 6.6L L5P Duramax Diesel