2017-2024 GM 6.6L Duramax OEM Length Replacement High Flow Up-Pipe Kit

PPE Replacement High Flow Up Pipe Kit (2017–2026 L5P Duramax)

The factory up-pipes on the L5P Duramax are undersized, non-corrosion resistant, and introduce restrictions that hurt turbo efficiency and increase pumping loss. The PPE High Flow Up-Pipes solve these issues with a premium stainless steel build and a smoother, less restrictive design.

By opening up the factory bottleneck and eliminating tight bends, these up-pipes can increase exhaust airflow by up to 46%, allowing exhaust gases to flow more efficiently to the turbo. The result is improved turbo response and better performance under load.

These up-pipes are a direct bolt-on replacement to OEM exhaust manifolds, and include new gaskets for a clean, hassle-free install.

Features

• 46% larger flow area compared to stock

• High-flow design for smooth, unobstructed exhaust flow

• Manufactured from premium stainless steel

• Three-layer internally sleeved exhaust bellow for durability under heat and pressure

• Stainless steel gaskets included

• Direct bolt-on replacement

Part Number

116122000

GTIN

840171209570

OEM Reference

GM 12676611 / 12688021

Fitment

• 2017–2026 GM Duramax 6.6L L5P

• Chevrolet / GMC 2500HD and 3500HD