Black Bandit Race Exhaust 4-inch / No Muffler GM Duramax L5P - Down-pipe Back Race Exhaust System (2017-2023)
6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026

2017 - 2019

4-inch Downpipe-Back

No Muffler

$515.00
$825.00 $515.00
Sale 38% Sold out
  • Black Bandit Race Exhaust 4-inch / No Muffler GM Duramax L5P - Down-pipe Back Race Exhaust System (2017-2023)
  • Black Bandit Race Exhaust GM Duramax L5P - Down-pipe Back Race Exhaust System (2017-2023)
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GM Duramax L5P (2017 - 2026)

6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026

6.6L Duramax L5P 5 Inch Downpipe-Back Exhaust System | 2017–2026

1,723 Google Reviews

SKU:ESSS-GM-17-4

$515.00
$825.00 $515.00
Sale 38% Sold out
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Introduction

Unlock the full potential of your Chevrolet Silverado or GMC Sierra 2500/3500HD 6.6L Duramax L5P with the Downpipe-Back Race Exhaust System, available for 2017–2019 and 2020–2026 models. Built from 16-gauge stainless steel and offered in 4-inch or 5-inch variants. This L5P downpipe back exhaust delivers unrestricted flow, improved throttle response and a deep aggressive tone purpose built for serious off-road and competition use.

Available Variants

  • 2017–2019 GM 2500/3500HD Duramax L5P
  • 2020–2026 GM 2500/3500HD Duramax L5P

Both versions feature a 4” or 5” stainless steel configuration designed to fit each model generation precisely.

Features

  • 16-gauge stainless steel construction for strength and corrosion resistance
  • 4” and 5” diameter options to tailor flow, tone and application
  • Downpipe-back race exhaust design for maximum airflow and power
  • OEM-style hangers and prewelded contour bends for accurate fitment
  • Improved flanges and stainless clamps for secure, leak-free connections
  • OEM-style 4-bolt turbo flange (2020–2026 variant only)
  • No bungs for a clean, unrestricted exhaust path
  • Fits EC-CC/SB-LB-Dually configurations (not for Cab & Chassis trucks)
  • Ease of installation with all necessary hardware included

Benefits

  • Boosts horsepower and torque by reducing exhaust restriction
  • Lowers EGTs during towing and heavy load operation
  • Improves turbo spool and throttle response
  • Enhances airflow for better engine breathing and efficiency
  • Produces a deep, performance-driven exhaust tone
  • Built from premium stainless steel for long-term durability in harsh conditions

Compatibility

  • 2017–2019 Chevrolet Silverado / GMC Sierra 2500HD–3500HD 6.6L Duramax L5P
  • 2020–2026 Chevrolet Silverado / GMC Sierra 2500HD–3500HD 6.6L Duramax L5P
  • Fits EC-CC/SB-LB-Dually trucks
  • Not compatible with Cab & Chassis models
  • 2020–2026 models must have OEM-style 4-bolt turbo flange

Technical Specifications

  • Material: 16-gauge stainless steel
  • Diameter: 4” or 5” mandrel-bent tubing
  • Configuration: Downpipe-back, single side exit
  • Finish: Natural brushed stainless
  • Hardware: Stainless clamps, contour-bent hangers, prewelded flanges
  • Design: Bung-free, high-flow race system

Installation & Notes

  • Direct bolt-on installation using factory hanger points
  • No cutting or welding required
  • Must be paired with off-road race tuning for proper performance
  • Professional installation recommended for best results
  • For off-road and race applications only

Frequently Asked Questions

What sizes are available?

Choose between 4-inch or 5-inch stainless steel versions.

Does it require tuning?

Yes. Race tuning is required for correct performance and to prevent error codes.

Are all components included?

Yes. Each kit includes clamps, contour-bent hangers and improved flanges.

How does it change sound and performance?

Expect a deeper exhaust tone, faster turbo spool, lower EGTs and improved throttle response.

Customer Reviews

Overall rating: 4.7 / 5 from 158 reviews.

Tuner depot was very helpful I thought I screwed up on the tune part and flashing the ecm but there customer service told me I didn’t mess it up and helped me through it but one thing for sure is nothing to do with tuner depot but no one every tells you on a first time doing one of these trucks the amount of hours it takes it took me almost 30 hours which if I had the right tools and confidence I could of probably cut it down to about 20 but kit works great it’s got awesome power now and I’ll be doing the down pipe very soon to I highly recommend just buying it and getting it over with because the truck is still very quiet almost like it’s a notch above stock

Andrew H. 5/5

Just got them installed on my truck yesterday and cannot believe the increase in performance! Can’t wait to take it on a road trip already see more power increase and fuel mileage. Unbelievable would do it again tomorrow!

Jack D. 5/5 Verified

Love the sound of the straight exhaust especially on the Dirtymax they just sound badass without a muffler

Melvin G. 5/5 Verified

I purchased the efi live sotf tunes along with Dpf delete kit, dpf was good quality, tuner worked with me and not only sent my autocal loaded with a sotf tune but also sent me a few single tunes to use until I installed the switch, the only negative was that 130hp was the max power tune single or switch on the fly, but over all I was pretty happy and service was very good throughout.

Michael A. 4/5 Verified

Customer service absolutely sucks!!!!

Michael C. 1/5 Verified

Great product

Craig B. 5/5 Verified

Worked and fit as expected

Kevin L. 5/5 Verified

Perfect sound

Mark G. 4/5 Verified

Could have come with some kind of directions. Made it through it ok but a little direction would have been nice. Overall everything works as it should.

Brett S. 4/5 Verified

Sounds great not to loud

Brandon P. 5/5 Verified

Before installing never had a code after install getting low fuel rail pressure code under load. If I keep RPMs up just a little ( by switching to manual shift and never come out of 5 gear Allison 6 speed trans) will work fine . If u shift to 6th gear lower RPM as soon as u go up a little incline it starves for fuel and goes into reduced power mode. But if u mash the excelsior and down shifts it will take off like a rocket.

David M. 2/5 Verified

Worked perfectly.

Michael A D. 4/5 Verified

Sounds good.

Scott M. 5/5 Verified

Truck has a nice rumble but not excessively load like a straight pipe.

Jeffrey D. 5/5 Verified

Muffler has great sound, no restrictions. The best part of the whole deal was the outstanding service and shipping that Tuner Depot provided. Would definitely use them again.

Jim H. 5/5 Verified

Fit was very good and looks great on my vehicle.

William D. 5/5 Verified

Sound is exactly what I was looking for.

William D. 5/5 Verified

Was a little nervous if it was going to show up, nice quality and ease of install would purchase again

Harry S. 5/5 Verified

Excellent

Jeromie A. 5/5 Verified

Nice mellow tone and quiet, no diesel is quiet but this muffler makes trips comfortable with no throwing noise at highway speeds.

Mike S. 5/5 Verified

Glad there are still parts company around

Angel S. 5/5 Verified

Timely shipping Not yet installed

Jim O. 5/5 Verified

When buying the delete kit make sure you buy this if your doing a FULL delete. Once installed the truck sounded amazing with the 5 inch exhaust.

Gerardo C. 5/5 Verified

Easier install then I expected solid switch cant complain

Rob R. 5/5 Verified

Really Love The Quality of the Exhaust look Great

James L. 5/5 Verified

Already put On All good Works Great

James L. 5/5 Verified

I Will Be Putting it all together this weekend But Love It

James L. 5/5 Verified

Great

Jerry P. 5/5 Verified

Fit great just a job to install

Vernon S. 5/5 Verified

Shipped very fast and worked great!

Nathan J. 5/5 Verified

Couldn’t be happier with the product super easy to install. Just cut out the old and install the new baby. Love it.

Michael C. 5/5 Verified

Couldn’t be happier with the price. The product is on point. The shipping was fast and easy and the installation was great. Can’t speak. Highly enough of tuner depot will be ordering again for future purchases guaranteed

Michael C. 5/5 Verified

Worked very well fast shipping

Nathan J. 5/5 Verified

Everything went smoothly only issue I had was the cheap hose clamps they sent with it would recommend putting better ones in kit

Vernon S. 5/5 Verified

Everything fit well, except for the pipe, reaching back past the last catalytic converter was 9 inches too short I had to find a piece in town to fit that and another band clamp

Vernon S. 3/5 Verified

So far, I am loving all the tunes. There’s a noticeable increase in gas mileage and it really woke up this LBZ. Very happy

Kimberly C. 5/5 Verified

Great way to protect the fitting if I need to un delete the truck. Well worth the money. Quality parts.

Merrill A. 5/5 Verified

No new oil seals for turbo came with coolant seals but no oil seals

Cameron S. 3/5 Verified

Sounds amazing and very aggressive. Has a deep rumble and when the turbo hiss’s sounds like a jet. 10/10 would highly recommend. Everything lined perfectly in the exhaust kit. Did pair it with the downpipe purchased from here and was beyond please! Thanks guys! Plan on using this site for many more solution kits in the future!

Lucas A. 5/5 Verified

All block off plates and gaskets worked perfectly. The coolant lines worked as well and had zero issues with anything.

Lucas A. 5/5 Verified

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