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2001-2007 Duramax 4" SS Downpipe Back Exhaust System - No Muffler (DDC-4GM01)

(6)
Dirty Diesel Customs
$730.00 CAD
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Purchase to earn 730  Dirty Dollars Learn More

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Truck Fitment
Warranty

Description

Note: Fits all wheelbases and cab configurations unless otherwise noted. This is a straight-pipe system with no muffler included.

The DDC-4GM01 4" downpipe back race exhaust system for 2001-2007 Duramax trucks replaces the restrictive OE setup with a high-flow straight pipe design built for track performance. This muffler-free kit includes all necessary clamps, pre-welded, contour-bent hangers, and reinforced flanges for a smooth, hassle-free install. Expect aggressive sound, improved torque, faster throttle response, and optimized diesel performance.

Why Shop Dirty Exhausts?
When you buy from Dirty Diesel, you’re buying peace of mind. We’ve put in the work to bring you exhaust systems that meet our strict standards for durability and flow. Every kit is vetted for a precision, bolt-on fit, ensuring you get a high-performance system that sounds as good as it performs, without the headache of poor fitment or subpar materials.

Part Number: DDC-4GM01

Features
  • 4" Downpipe Back Exhaust
  • Stainless Steel Construction
  • Single Side Exit Design
  • No Muffler Included
  • Easy OE Hanger Installation
  • Reinforced flanges

Includes
  • (1) 4" Stainless Steel Downpipe Back Exhaust System
  • Heavy-Duty Installation Clamps
  • Pre-Weld Contour-Bent Hangers

Warranty
We overengineer everything we make. It's manufactured to last and tested to prove it, and if by some strange anomaly it ever lets you down, we'll fix it, have a word with whoever built it, and come back stronger. That's the Dirty Lifetime Warranty. Click here for all the details.

Questions and Answers

Don't see your question? Ask us anything about this product.

  • My truck is an extended cab long box 1 ton would this fit

    Yes, designed to fit all wheelbases and cab configurations unless otherwise specified.

  • Will this work with my stock down pipe and do I need a tune to run it ??? I have an 07 LBZ no def on it

    This is a down pipe back exhaust so it will work with the stock downpipe but you'll need a tune to account for the removal of the DPF (unless the DEF system has been tuned out).

Vehicle Fitment - Part No: DDC-4GM01

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Customer Reviews

Overall rating: 4.7 / 5 from 6 reviews.

Over good quality. The length come set up for crew cab short box. With insert to make it fit long box. My truck is a ext cab short box lbz, there was no instructions for how much to cut off the middle pipe with the long straight section. But after a couple measurement and comparison of wheel base from ext to crew cab short box there is about 10 inches in wheel base difference. Ended up taking of 8 inches to be safe and it fit perfectly. Good product but the lack of instructions made the install take twice as long.

Nick C. 4/5

2001-2007 Duramax 4" SS Downpipe Back Exhaust System - No Muffler (DDC-4GM01)

  • Endless Support

    A team on staff, ready to help before or after your purchase.

  • We sell what we use.

    We only carry the best in Diesel Performance.

  • Canadian. Eh?

    Located in West Kelowna, BC.
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