Black Bandit Race Exhaust 4-inch Downpipe-Back GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)
6.6L Duramax LMM Downpipe Back Exhaust | GM 2007.5-2010

4-inch Downpipe-Back

$467.50
$660.00 $467.50
Sale 29% Sold out
  • Black Bandit Race Exhaust 4-inch Downpipe-Back GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)
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GM Duramax LMM (2007 - 2010)

6.6L Duramax LMM Downpipe Back Exhaust | GM 2007.5-2010

6.6L Duramax LMM Downpipe Back Exhaust | GM 2007.5-2010

1,723 Google Reviews

SKU:ESSS-GM-07-4

$467.50
$660.00 $467.50
Sale 29% Sold out
Exhaust System

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Introduction

Unleash the full potential of your 6.6L Duramax with the GM Duramax LMM Downpipe-Back Exhaust System, built for 2007.5–2010 Chevrolet Silverado and GMC Sierra 2500/3500HD models. Available in both 4-inch and 5-inch diameters, this system maximizes exhaust flow, reduces EGTs and delivers a deep, aggressive tone for serious off-road performance.

Vehicle Compatibility

  • Years: 2007.5-2010
  • Makes: Chevrolet Silverado, GMC Sierra
  • Models: 2500HD, 3500HD
  • Engine: 6.6L Duramax LMM (diesel)
  • Body: Pickup
  • Cab Styles: Extra Cab (EC), Crew Cab (CC)
  • Box Lengths: Short Box (SB), Long Box (LB)
  • Configuration: Single Rear Wheel (SRW) and Dually (DRW)

Please Note: Not compatible with Cab & Chassis or 3-bolt flange models

Technical Specifications

  • Material: 16-gauge T409 stainless steel
  • Diameter: 4” or 5” mandrel-bent tubing
  • Configuration: Downpipe-back, single outlet
  • Clamps: Stainless steel band clamps
  • Finish: Natural brushed stainless
  • Use: Off-road and race applications only

Features

  • Performance downpipe-back design for maximum flow
  • Offered in 4' and 5' T409 stainless steel for strength and longevity
  • 16-gauge stainless construction resists corrosion and fatigue
  • Contour Bent Hangers ensure precise, rattle-free alignment
  • Stainless steel clamps provide leak-free joints
  • Prewelded flanges and contour bends simplify installation
  • No bungs for a clean, unrestricted design
  • Fits Cab/Box configurations: EC-CC/SB-LB-Dually
  • Ease of installation with all hardware included
  • Optional muffler add-on available for quieter operation

Benefits

  • Frees up exhaust flow for noticeable performance gains
  • Lowers EGTs under heavy load and towing
  • Reduces backpressure, improving throttle response
  • Durable T409 stainless withstands high-heat, high-vibration use
  • Straightforward bolt-on setup for minimal downtime
  • Delivers a powerful, deep exhaust tone ideal for off-road builds

Installation & Notes

  • Bolt-on design—no welding or cutting required
  • Uses Contour Bent Hangers for factory-style alignment
  • Professional installation recommended for fit and clearance
  • Must be paired with proper race tuning to function correctly
  • For competition/off-road use only

Frequently Asked Questions

Is this exhaust street-legal?

No. It is for off-road or race use only and not legal on public highways.

What’s the difference between 4” and 5” Duramax LMM exhaust?

The 4” provides excellent fitment and moderate tone; the 5” offers deeper sound and maximum flow.

Does Duramax LMM exhaust include all necessary hardware?

Yes. Includes clamps, Contour Bent Hangers and all mounting hardware.

Do I need tuning after installation?

Yes. Proper race tuning is required for the system to function correctly.

Will Duramax LMM Exhaust System lower EGTs?

Yes. The free-flowing design reduces backpressure and lowers exhaust gas temperatures for better off-road performance.

Customer Reviews

Overall rating: 4.8 / 5 from 17 reviews.

Customer photo review of GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)

Shout out to Turner Depot for their awesome fast shipping and great product. Very easy to install and love the sound highly recommended to anyone looking to upgrade their exhaust.

Shawn H. 5/5 Verified

GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)

Customer photo review of GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)

Fit great, really easy to install, only thing they could make better is where the exhaust hanger goes into the rubber bushing doesn’t have a little ball on the end of it, so it kept falling out, made 2 cuts and bent the hanger a little more and no problems since.

Brandon H. 4/5 Verified

GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)

The woman I talked to was very nice and answered the questions I had about the exhaust. She placed the order and we were done in a few minutes. All the pieces were in one box. Installation takes an hour or less. Have fun.

Mike M. 5/5 Verified

6.6L Duramax LMM Downpipe Back Exhaust | GM 2007.5-2010

2007.5 GMC Sierra with LMM diesel extended cab truck. Overall happy with product but they should put some directions in the box. It should have been about an hour job with me and my som laying on our backs on the concrete,yes a lift would have been better. Could not get the parts to fit together in any configuration to get the right length. After about 6 hours messing with it finally realized that the second piece back was about 6” too long. So we cut it off 6” and custom fit it together. Also was only able to use 3 of the factory exhaust hangers. More directions please!!

Shannon S. 3/5

6.6L Duramax LMM Downpipe Back Exhaust | GM 2007.5-2010

It’s made very well and uses all band clamps not the cheap u ones it sounds amazing I did have to trim to fit but outside of that it went in place and is held up by the factory hangers this is made very nice I wasn’t sure about getting it but I am so happy I did also it showed up two days early

Vincent V. 5/5

GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)

Hands down the best... it fit perfectly on my LMM.. I have installed MBRP on my LLY and it did not fit as good as this did. I will definitely use again when I need to redo my LLY.

Carol A. 5/5 Verified

GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)

It was fairly easy to install although there wasn’t any pictures or instructions, so some of it was guess work until the combination is correct. Sounds great and trick breaths MUCH better now.

Jason P. 4/5 Verified

GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)

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