GM Duramax L5P - Down-pipe Back Race Exhaust System (2017-2023)
Type: Exhaust Systems | Fits: GM Duramax
Unleash the full performance of your 2017–2023 Duramax 6.6L L5P with the Black Bandit Downpipe-Back Race Exhaust System. Starting directly from the downpipe, this exhaust eliminates the factory catalytic converter and DPF filter for maximum airflow, reduced exhaust gas temperatures (EGTs), and serious power gains. Built for durability and off-road competition, this system transforms how your truck performs and sounds.
Vehicle Fitment
- ✅ 2017–2023 Chevrolet Silverado 2500/3500HD (6.6L Duramax L5P)
- ✅ 2017–2023 GMC Sierra 2500/3500HD (6.6L Duramax L5P)
- ❌ Not compatible with Cab & Chassis trucks
Specifications
| Feature | Details |
|---|---|
| Pipe Size Options | 4" or 5" stainless steel |
| Construction | High-grade stainless steel for long-term durability |
| Design | Downpipe-back system for maximum flow |
| Installation | OE-style hangers, clamps, and hardware included |
| Performance Benefits | Increased horsepower, torque, and efficiency; reduced EGTs |
| Sound Options | Optional muffler available for quieter exhaust tone |
| Bungs | None (race system design) |
| Requirements | Requires race tuning; off-road use only |
Key Features
- 4" or 5" Stainless Steel Options: Choose the size that best fits your performance needs.
- Maximum Flow Design: Downpipe-back configuration removes factory restrictions for optimal performance.
- Lower EGTs: Keeps your engine cooler under heavy loads or towing.
- Improved Power & Efficiency: Unlocks horsepower and torque while improving throttle response.
- OE-Style Hangers: Simplifies installation with factory-style mounting points.
- Optional Muffler: Customize your exhaust note to be aggressive or refined.
Performance Benefits
Upgrading to this Black Bandit downpipe-back system delivers immediate improvements in airflow, helping your Duramax breathe better and run stronger. Expect sharper throttle response, cooler operating temps, and a deep, aggressive exhaust tone that matches your truck’s power.
Installation Notes
This exhaust system is a direct-fit upgrade and includes all necessary hardware and OE-style hangers. Some modifications may be needed depending on truck configuration. Race tuning is required for proper operation. Professional installation is recommended for best results.
Important Notes:
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Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
