2020-2025
2015-2019
2007-2014
2001-2006
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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Magnaflow Custom Builder Pipe Series Downpipe-Back Single Exhaust System; Side Exit (01-04 6.6L Duramax Sierra 3500 HD w/o Factory Installed Catalytic Converters)Find parts that fit my vehicle
Item SHG51538
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Our Price
$565.00 kit
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Product Information
Features, Description, Q&A, Specs & Installation
Features & Specs
- Downpipe-Back Single Exhaust System
- Single Exhaust System with Side Exit for Aggressive Look and Sound
- Custom Builder Pipe Series Allows for a Tailored Exhaust Configuration
- Smooth Exhaust Flow and Improved Performance
- Built from Premium-Grade Materials
- Premium Stainless Steel Construction
- Mandrel-Bent Tubing
- Corrosion-Resistant Material for Long-Lasting Use
- Rigorously Tested for Reliability and Efficiency
- Durable, Dependable, and Long-Lasting Quality
- Quick and Easy Bolt-On Installation
- All Necessary Hardware Included
- Limited 1-Year Warranty
- Fits 2001-2004 6.6L GMC Duramax Sierra 3500 HD Models without Factory Installed Catalytic Converters
| Brand | Magnaflow |
| Exhaust System Type | Cat-Back System |
| Exhaust Tip Finish | No Tips |
| Exhaust Tubing Diameter | 4.00 Inch |
| Exhaust Material | Aluminized Steel |
| Exhaust Tip Outlet Style | No Tip |
| Exhaust Exit Location | Passenger Side - After Tire |
| Exhaust Loudness | Moderate |
Description
Performance-Driven Exhaust Upgrade. The Magnaflow Custom Builder Pipe Series Downpipe-Back Single Exhaust System is designed to enhance the exhaust performance of your 6.6L GMC Duramax Sierra 3500 HD. This system improves exhaust flow by eliminating restrictions, resulting in better horsepower and torque. Its side exit design provides an aggressive sound and sleek appearance, making it an excellent upgrade for diesel truck enthusiasts.
Construction and Appearance. Constructed from high-quality stainless steel, this exhaust system is built for longevity and durability. The mandrel-bent tubing ensures smooth exhaust flow, reducing back pressure and enhancing engine efficiency. The corrosion-resistant finish keeps the system looking and performing at its best even in harsh conditions.
Installation. This exhaust system is designed for a straightforward bolt-on installation, requiring minimal modifications. It includes all necessary hardware, making it easy for experienced DIYers or professional installers to fit onto your truck.
Warranty. This exhaust system is backed by Magnaflow’s limited 1-year warranty, ensuring long-term reliability and performance.
Application. This Magnaflow Custom Builder Pipe Series Downpipe-Back Single Exhaust System (Side Exit) fits 2001-2004 6.6L GMC Duramax Sierra 3500 HD models without factory-installed catalytic converters.
Fitment:
- 2001 GMC Sierra 3500
- 2002 GMC Sierra 3500
- 2003 GMC Sierra 3500
- 2004 GMC Sierra 3500
Magnaflow 18980
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Downpipe-Back Single Exhaust System
4.6
Reviews of Magnaflow Exhaust Products (500+)
Reviews of Magnaflow Exhaust products have an average rating of 4.6 out of 5
Questions & Answers
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Will It Fit My Sierra 3500
- 6.6L V8 Duramax - 01, 02, 03, 04
Designed for Extended and Crew Cab Models
