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Upgrade your 2017–2023 Chevrolet/GMC Duramax 6.6L L5P with the Polar Diesel 5" Exhaust System. Built from durable T409 stainless steel, this system improves exhaust flow, reduces EGTs, boosts fuel economy, and adds horsepower and torque. Designed for a hassle-free installation, it features precise pre-bent exhaust hangers, stainless lap joint clamps, and a 4" CAT pipe connection to the 5" exhaust, ensuring a precise fit and long-lasting performance.
Trusted by diesel owners across Canada and the USA for rugged performance and reliability.
Looking for proven diesel performance parts that actually fit and perform? We stock hand-selected upgrades for Duramax, Cummins, and Powerstroke platforms — no guesswork, no junk.
From tuning and exhaust to suspension, engine internals, and recovery gear, everything we carry is backed by real-world testing and used by builders who know what works. If it’s on our site, it’s here for a reason.
