AFE ATLAS 4" Aluminized DPF-Back Exhaust System 2016 GM 6.6L Duramax LML AFE-54-12619-B If you're using a Fleece

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AFE ATLAS 4" Aluminized DPF-Back Exhaust System 2016 GM 6.6L Duramax LML AFE-54-12619-B If you're using a FleeceAFEs ATLAS 4 Aluminized DPF Back Exhaust System delivers your truck from a single exhaust to an aggressive dual exhaust, while providing an increase in horsepower, low turbulence, and lower EGTs. How does it do this? This system is made of 4" mandrel bent aluminized steel tubing with smooth transition bends that allow for maximum flow. Giving you all the benefits you could ever need in an exhaust. Other advantages include: OE Fit: OE style bayonet