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.

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