DIESELR Downpipe Back Exhaust - Single (2007.5-2010 GM 2500/3500 6.6L Duramax LMM)

Why This Downpipe-Back Exhaust Is Built for the LMM Duramax

The factory exhaust system on your 2007.5–2010 LMM Duramax is robbing your truck of airflow and holding back serious power. The DIESELR LMM Duramax Downpipe-Back Exhaust replaces restrictive stock piping with a mandrel-bent, heavy-duty system designed for lower EGTs, increased power, and an aggressive tone that says you mean business.

 Built to Perform. Built to Last.

• T409 Stainless Steel: Corrosion-resistant and ready for harsh conditions
• Mandrel-Bent Tubing: No crimps or bottlenecks
• Leak-Free Fitment: Includes clamps and upgraded flanges
• Pre-Welded Hangers: For secure, hassle-free install

This is a downpipe-back exhaust that’s built for the long haul — no weak welds, no compromises.

 Why Duramax Owners Love This Exhaust

• Better airflow for the LMM Duramax
• Lower exhaust gas temperatures (EGTs)
• Stronger horsepower and throttle response
• Deeper, louder diesel tone

If you're running a tuned truck, this is the system that lets it breathe.

Exact Fit for 2007.5–2010 Duramax LMM

Built for GM 2500/3500 HD trucks with the 6.6L Duramax LMM engine. Supports most cab/bed setups:

EC, CC / SB, LB, Dually

Note: No sensor bungs — ideal for custom race setups.

What’s in the Box

• Complete LMM Duramax Downpipe-Back Exhaust System
• Clamps, hangers, and flanges — all included

Legal Notice

For off-road and race use only. Requires aftermarket tuning. Not for street-driven trucks. Know your local laws before installing.

Why Dieselr?

Because we’re not guessing — we’re the source.

• Trusted by major resellers
• Backed by real diesel techs
• Fast shipping from multiple North American warehouses
• When other sellers fall short, Dieselr delivers.