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  • For Off-Road Use Only
    Black Bandit Race Exhaust 4-inch Downpipe-Back GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)
  • For Off-Road Use Only
    Black Bandit Race Exhaust 5-inch Downpipe-Back GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)
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GM Duramax LMM Downpipe Back Exhaust (2007.5-2010)

Vendor: Black Bandit
Sku: ESSS-GM-07-4

This product fits:

2007.5-2010 Chevy Duramax LMM 6.6L Silverado 2500HD / 3500HD Pickup
Fits Cab/Box Configurations: EC-CC/SB-LB-Dually
Not compatible with late models with a 3 bolt flange
$660.00
$467.50
-29%
Shipping calculated at checkout.
Exhaust System: 4-inch Downpipe-Back

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Within the device vehicle info section, look for the value with the text containing "14C204":
HC3A-14C204-ABH

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Black Bandit Series 3 material image
T304 Stainless Steel

The Purest Stainless Steel used in Exhaust System Manufacturing

rust resistant icon

High Rust Resistance

Lasts up to 20+ years icon

Lasts Up To 20+ years

Looks better icon

Looks Better

Black Bandit title material-image
T409 Stainless Steel

The Standard Stainless Steel used in Exhaust System Manufacturing

rust prone icon

Low Rust Resistance

Lasts up to 20+ years icon

Lasts Up To 5-8 Years

Looks better icon

Looks Dull

Attention

A 2022 Cummins Tune Package was added to your cart. This tune is a beta tune that may cause the following:

  • Low power
  • Poor fuel mileage
  • Engine codes that may appear
  • Poor shifting characteristics

For a tested and proven tune, please view our Ram Cummins 6.7L All-in-One DPF/DEF/EGR Delete Kit w/ECM Swap (2022-2024)

Attention

You have added a product to your cart that requires the Service. This required additional service is NOT included in the price shown on TunerDepot.com. This means that you will be required to pay for the Service in addition to the product you have just added to the cart.

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.

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

Compatibility

  • 2007.5–2010 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
  • 2007.5–2010 GMC Sierra 2500HD / 3500HD 6.6L Duramax LMM
  • Fits EC-CC/SB-LB-Dually configurations
  • 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

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.

Important Product Information

Off-Road Use Only: The products sold on this website are intended for off-road use only, and may not be legal for use on public highways where pollution control laws apply.

Check Local Laws: Before purchasing and installing any of these parts, please check your local and state laws to confirm whether the modifications are legal in your area.

Professional Installation Recommended: These kits and parts are strongly recommended to be installed by professional mechanics only. Improper installation may lead to performance issues or damage to your vehicle. Unless specified differently on the product page, our parts do not include installation instructions. They are intended for individuals with a proficient understanding of mechanical systems and procedures. Like many aftermarket parts compatible with a variety of vehicles, minor adjustments or modifications may be necessary during the installation process. We cannot accept returns or offer refunds on the basis of an inability to complete the installation due to the absence of instructions.

Warranty: The use of these parts will void the warranty of your vehicle. Please confirm with your vehicle manufacturer before purchase and installation.

No Liability: Tuner Depot is not responsible for any damage or issues that may arise from the use of these parts.

Product Images: Product images are for illustrative purposes only and may differ from the actual product due to manufacturer design changes or improvements.

Returns & Refunds: All sales of exhaust pipes, straight pipes, and engine pipes are final and Non-Returnable and Non-Refundable.

No Performance Guarantees: While these parts are designed to enhance the performance of your vehicle, no guarantees are made regarding the specific performance gains that will be achieved.

Shipping Policy at Tuner Depot

At Tuner Depot, we understand the importance of timely delivery for your performance parts. We're committed to ensuring a seamless shipping experience, striving to dispatch your orders with utmost efficiency and speed.

Our Shipping Policy: Our aim is to dispatch all orders within two business days, providing you with a quick and efficient processing time. However, unforeseen circumstances beyond our control may occasionally impact shipping times.
Factors Affecting Shipping:
  • Weather Conditions: Adverse weather conditions such as rain, snow, or sleet may affect delivery timelines. We will make every effort to minimize any delays.
  • Holiday Periods: Please note that our shipping center will be closed during holidays. We will resume shipping promptly on the next business day. Allow for potential delays during peak seasons, but rest assured, we will keep you informed every step of the way.
  • Staff Availability: Unforeseen circumstances can occasionally affect our staffing levels, possibly leading to minor delays. We are committed to swiftly resolving any issues to maintain our high standards of service.
We genuinely appreciate your understanding and patience during any unexpected obstacles. Be assured that we will utilize every resource available to deliver your performance parts promptly.