SKU: 22276593085

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

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Description

6.6L Duramax LMM Downpipe Back Exhaust | GM 2007.5-2010Introduction Unleash the full potential of your 6. 6L Duramax with the GM Duramax LMM Downpipe Back Exhaust System, built for 2007. 52010 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:

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

Q1: Is this exhaust street-legal?
A1: No. It is for off-road or race use only and not legal on public highways.

Q2: What’s the difference between 4” and 5” Duramax LMM exhaust?
A2: The 4” provides excellent fitment and moderate tone; the 5” offers deeper sound and maximum flow.

Q3: Does Duramax LMM exhaust include all necessary hardware?
A3: Yes. Includes clamps, Contour Bent Hangers and all mounting hardware.

Q4: Do I need tuning after installation?
A4: Yes. Proper race tuning is required for the system to function correctly.

Q5: Will Duramax LMM Exhaust System lower EGTs?
A5: Yes. The free-flowing design reduces backpressure and lowers exhaust gas temperatures for better off-road performance.

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SKU: 22276593085

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Ng Meowster
Birmingham, US
★★★★★ 2
Good to have if you've never seen the iTEP exam, but don't rely on it to boost your scores
Format: Paperback
This book is good in that it comes with two practice tests: one in the beginning of the book, one in the end of the book. The grading rubric is helpful too. However, the actual guide part of the book, doesn't help too much with how to improve test scores. What I like least about this guide is that it won't tell you which questions you answered incorrectly on the practice exams. A good test prep guide will tell you what you answered incorrectly, and will tell you what logic to follow to get to the correct answer. In the reading passages, it would be nice to know where I can find evidence to justify the "correct" answer. In the grammar section, it would be nice to know which rule I'm violating. Any test guide should always come with some testing strategies. I.E. If this question is taking up too much time, skip it and go to the next one. This guide lacks simple strategies like that. Simple strategies like that could be useful when incorporated into this guide because there are certain sections on the exam that you can go back to previous questions, but some sections where the "back" button is disabled. Overall, if you've never seen an iTEP exam before, this book is certainly helpful in that it will give you an idea of what you will be testing for. However, this book alone won't help you achieve a score of 6. The table of contents itself will tell you there are only 86 pages of actual content covering test material. That's not enough to cover how to excel in the exam.
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Cliente Amazon
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★★★★★ 1
Don't buy it
Format: Paperback
It does not prepare for the real test. Using it is absolutely not enough to be approved with good grades. Too expensive for what it offers.
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Reviewed in the United States on October 21, 2016
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Xiaomeng Han
Port Orchard, US
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Guanxiong Xue
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Ryan
New York, US
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Exactly the same as the free PDF I downloaded online for my student, only this costs $26 plus tax.
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Reviewed in the United States on April 3, 2017

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