• 4" downpipe-back full exhaust delete pipe system for GM Chevy 6.6L Duramax diesel engines 2001-2016.
  • 4" polished stainless steel downpipe-back exhaust delete pipe for GM Chevy 6.6L Duramax diesel engines.
  • 4" stainless steel downpipe-back exhaust delete pipe for GM Chevy 6.6L Duramax diesel engines.
1 3

4" Downpipe-Back Full Exhaust Delete | GM/Chevy 6.6L Duramax 2001-2016

4" Downpipe-Back Full Exhaust Delete | GM/Chevy 6.6L Duramax 2001-2016

$839.00
$839.00
Sale Sold out
Shipping calculated at checkout.
  • Increased Horsepower
  • Maintenance Savings
  • Increased Fuel Mileage
Choose Your Truck
  • We Pay Shipping
  • Tech Support
  • Installation Guide
View full details

FITMENT

Please choose the correct year variant before placing your order.

This product is compatible with:

  • Years: 2001–2016
  • Models: Chevy Silverado and GMC Sierra 2500HD and 3500HD
  • Engine: 6.6L Duramax: LB7 (2001–2004), LLY (2004.5–2005), LBZ (2006–2007), LMM (2007.5–2010) or LML (2011–2016)

2015 or 2015.5? Check your downpipe connection.

  • 2015 (early model): V-band clamp at the downpipe
  • 2015.5 (later model): 3-bolt flange at the downpipe

BENEFITS

✅ Best Selling Dodge Ram 4" Full Exhaust

✅  High Quality Aluminized Steel

✅ OEM Style Hangers & Clamps For Easy Installation

✅ Connects from the Down Pipe

✅ Fits All Cab & Box Lengths

✅ Shipping Included In Price


Eliminate the following components 

  • Diesel Particulate Filter (DPF)
  • Catalytic Converter (CAT)
  • This 4" exhaust starts at the down pipe & allows the removal of the catalytic converter and DPF filter

**Race Only. Please check with local and state legislation/regulations for legality of such product/s.  We assume no liability for misuse of this products.**

IMPORTANT INSTALLATION INFORMATION

Not sure how to install this product? No worries! Every order comes with a step-by-step instruction guide, and our full-time support staff is here to help with any installation questions. Open a support ticket and we’ll get it sorted.

If you’re a complete fish out of water when it comes to working on your truck, we highly recommend having a shop do the install.

CAB & CHASSIS INFORMATION

These pipes are designed for pickup models. Cab & Chassis trucks will need modifications for the pipe to fit.

For more information, contact our sales team at (888) 830-2588 ext. 2 or sales@thedieseldudes.com.

SHIPPING & RETURNS

Processing

We’ll process your order within 1–2 business days, and then your pipe ships.

Shipping

  • Standard (free): 5–8 business days
  • Express: 3–4 business days, available at the end of checkout

If the pipe is out of stock, we accept back orders, but your order may take a few weeks to ship.

Alaska, Hawaii, and some Canadian locations are subject to additional freight charges.

Returns

All exhaust systems and DPF/CAT delete pipes are final sale and not eligible for a refund or return. If you receive a faulty or wrong product, we’ll send you a replacement.

The 4" Downpipe-Back DPF Delete Exhaust for the 2001-2016 Duramax pulls the Diesel Particulate Filter (DPF) and catalytic converter (CAT) off your Silverado or Sierra for good.

Here's how it works: this 4" aluminized steel exhaust runs from the downpipe back to the rear of the truck, replacing the factory DPF and CAT sections. OEM-style hangers and clamps lock it in place just like the factory system, so there's no fabrication and no welding. One thing to know up front: on these 2007.5-2010 LMM models, the front hangers are not used. The pipe is self-supporting without them, and that's completely normal.

In the box you get the 4" aluminized steel full exhaust, the OEM-style hangers and clamps, and a step-by-step installation guide. Nothing else to source. It fits all cab and box lengths on the Silverado and Sierra 2500HD and 3500HD, though Cab & Chassis trucks aren't covered.

Once that DPF backpressure is gone, the LMM breathes free. Your turbo spools faster, EGTs drop under towing loads, and most owners notice stronger throttle response along with better fuel economy on highway and towing runs. You'll need a compatible delete tune to keep DPF-related check engine codes away, so call us at (888) 830-2588 if you need help pairing the right tuner. Shipping is included.

For off-road/competition use only.

  • 5 stars: 7 (88%)
  • 4 stars: 1 (13%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
Jed
4in full exhaust

Everything I ordered was delivered in a timely manner . It fit like a glove and sounds absolutely amazing !!!

Jed review photo
S
Steven Stoltzfus

Fast shipping, very helpful people

L
Larry Payne

It work awesome no problems

L
Larry McCarty
2013 Chevy 4” full exhaust

Exhaust pipe came in and was very easy to install after removing the factory exhaust. Everything fit well with no issues.

T
Tyler Horst

4" Downpipe-Back Full Exhaust Delete | GM/Chevy 6.6L Duramax 2001-2016

R
Ronald Kaufman
Great product

Thanks your service is great and prices are very reeasonable

A
Aron Renfroe
Easy install

Easy to install and sounds great

C
Cayton Norris
Thank you.

I just wanted to thank the dudes over here, for going above and beyond to get me my product. One of the best customer experiences, I've had since the world got turned upside down by covid.

I
Intimnasc

I don't see an option for a crew cab long bed, does this have extensions to fit all?

thedieseldudes

Hey man, this pipe is designed to fit all bed/cab lengths.

T
Tate Richter

Does this exhaust system work with extended cab long bed trucks?

thedieseldudes

Yes, it has an extra piece for the long beds

D
Dominic

Do you offer a delete bundle for LLY that includes EFI, race pipe, egr full delete

thedieseldudes

Yep

Efi Live Here: https://thedieseldudes.com/collections/gm-chevy-duramax-2007-2016/products/2001-2016-gm-chevy-6-6l-duramax-custom-dpf-delete-tuner-efi-live-shift-on-the-fly

Pipe here: https://thedieseldudes.com/collections/gm-chevy-duramax-2007-2016/products/4-exhaust-dpf-delete-gm-chevy-6-6l-duramax-lmm-2007-2010

Egr Here: https://thedieseldudes.com/collections/gm-chevy-duramax-2007-2016/products/egr-delete-gm-chevy-duramax-2004-2005-lml

C
Charles Garrett

Will this pipe work for an 08'LMM CCLB?

thedieseldudes

Yes. It has an extra piece to fit the longer wheelbase of the long box.

S
Simon Walton

Stainless?

thedieseldudes

This is Aluminized

THE DIESEL DUDES vs Other Retailers

US

VS

THEM

  • Talk To A Real Human at 888-830-2588

    Hide Behind Their Website

  • We Ship World Wide, Including USA

    Limited Shipping Locations

  • Hundreds Of Positive Reviews From Real Customers

    Bad Service & Bad Reviews (or none at all)

  • Hand Selected The Best Delete Tuners & Parts For Every Year/Make/Model

    Show You A Large Catalog Of Options And Tell You "Good Luck, Figure It Out"