Polar Diesel 5" Exhaust With Muffler Chevrolet/GMC Duramax 6.6L L5P 2017–2023
Upgrade your 2017–2023 Chevrolet/GMC Duramax 6.6L L5P with the Polar Diesel 5" Exhaust System with Muffler. Built from T409 stainless steel, this 4" CAT pipe to 5" exhaust system delivers improved exhaust flow, reduced EGTs, better fuel efficiency, and increased horsepower and torque. Designed for hassle-free installation, it includes pre-bent exhaust hangers, stainless lap joint clamps, and a premium muffler for smoother, quieter performance.
- Single side exit for efficient exhaust flow
- 4" CAT pipe to 5" exhaust with muffler included
- Pre-bent exhaust hangers, stainless lap joint clamps
- No bungs; made from durable T409 stainless steel
- Reduces EGTs, boosts power, improves fuel economy
Trusted by diesel owners across Canada and the USA for fitment, durability, and reliable performance.
Installation & Compatibility
Designed for bolt-on installation on Chevrolet/GMC Duramax 6.6L L5P (2017–2023) with OEM 4-bolt downpipe flange.
- Fits 2017–2023 Chevrolet/GMC Duramax 6.6L L5P
- Compatible with crew cab (short, long, dually); regular cab requires modification
- Includes pre-bent exhaust hangers and stainless lap joint clamps
Our team at Kettle Valley Diesel is available for support if you have fitment or install questions. Reach out to us if you have any questions and we'll be ready to help.