5 Inch Exhaust System full downpipe back for 2017 to 2024 6.6L Duramax L5P – 409SS
Unleash True Sound and Performance
5 inch exhaust system for 6.6L Duramax L5P improves airflow, reduces backpressure, and delivers a deep, aggressive exhaust tone. As a result, your truck produces stronger horsepower, increased torque, and quicker throttle response.
Whether you tow, daily drive, or push your truck harder, this system delivers lower exhaust gas temperatures, stronger pulls under load, and a bold Duramax sound that stands out.
High-Flow 5 Inch Design
Mandrel-bent 5 inch piping allows exhaust gases to move freely from turbo to tailpipe. Because of this, the system eliminates factory restrictions and improves overall efficiency.
In addition, it balances sound, performance, and drivability for Silverado and Sierra HD trucks.
Durable Construction for Long-Term Use
Built from high-quality 409 stainless steel, this system handles daily driving, heavy towing, and high-performance use. Precision welds and heavy-duty hangers ensure a secure fit and long-term reliability.
Easy Bolt-On Installation
This system installs using a bolt-together design with basic hand tools. No welding is typically required. All clamps and hardware are included, so you get a clean, factory-style fit.
Once installed, expect improved exhaust flow, stronger throttle response, and a more aggressive exhaust tone.
Important Notes
- This product is intended for off-road or competition use only
- DPF removal is required for installation
- Custom tuning is required for proper operation
- Without proper tuning, check engine lights or performance issues may occur
- Not emissions compliant in many areas, verify local regulations before installation
