Flo~Pro 3.5" Turbo Direct Pipe | 2017-2026 Chevy/GMC 6.6L Duramax L5P

The Flo~Pro 3.5" Turbo Direct Pipe is a direct-fit exhaust upgrade built specifically for the 2017-2026 Chevy/GMC 6.6L Duramax L5P. Fabricated in Alberta, Canada from U.S.-sourced heavy-gauge steel tubing, it replaces restrictive factory piping with a full 3.5" flow path to help lower EGTs, sharpen throttle response and give your diesel a deep, clean, aggressive tone.

What This Downpipe Does

This downpipe replaces the restrictive factory pipe at the turbocharger outlet. It's where exhaust gas leaves the turbo, so improving flow here drops backpressure on the turbine and helps the turbo spool and breathe.

Fitment & Specs

• Years: 2017-2026
• Make: Chevy/GMC
• Engine: 6.6L Duramax L5P
• Configuration: Pickup
• Tubing Diameter: 3.5"

Why Flo~Pro

• Manufactured in Alberta, Canada, never offshore
• U.S.-sourced 16-gauge aluminized or T409 stainless steel tubing and steel hangers
• Model-specific fitment, adjusted for each production change so it bolts up right the first time
• Pre-welded contour bends and contour-bent hangers for OE-style alignment
• Upgraded flanges and lap-joint clamps for a secure, leak-free install
• Improved airflow and lower EGTs, especially under load and when towing
• Signature Flo~Pro tone: deep, clean and aggressive, never raspy or hollow