01-07 Duramax Exhaust

Downpipe Back Exhaust (01-07 Duramax LB7 LLY LBZ)

If you own a 2001-2007 Silverado or Sierra 2500HD/3500HD with a 6.6L Duramax (LB7, LLY, or LBZ), the factory exhaust is restrictive and holds these trucks back. This downpipe back exhaust replaces the OEM piping with a full mandrel bent T409 stainless system built for improved airflow, lower EGTs, and long term durability.

This is not a universal kit. This system is built specifically for your Duramax.

Benefits

Improved exhaust flow over stock
Lower exhaust gas temps (EGTs)
Faster spool and better throttle response
Deeper, smoother tone (with proper tuning)
Built to support upgraded turbos and power mods

Features

T409 stainless steel construction for corrosion resistance and long life
Mandrel bent tubing (no crimps, no restrictions)
Leak free flanges with upgraded clamps for a better seal
Pre welded hangers for easier install and a secure fit
No sensor bungs for a clean straight pipe design

Fitment

Fits:
2001-2007 Silverado / Sierra 2500HD & 3500HD
6.6L Duramax LB7, LLY, LBZ

Supports:
EC/CC, SB, LB, Dually

Does not fit:
Cab and chassis configurations

What’s Included

Complete downpipe back exhaust system
All clamps, flanges, and welded hangers included
Single side exit configuration
No bungs (clean straight pipe setup)

Important Notice

This exhaust system is intended for off road or competition use only and may require aftermarket tuning. Buyer is responsible for ensuring compliance with local laws and regulations.