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aFe Power releases part # 49-44054-P (Polished Tip) # 49-44054-B (Black Tip) which is a new 5” Down-Pipe Back exhaust systems for the 2015.5 GM Diesel Trucks with the V8-6.6L (td) engine. These systems are constructed from 5″ mandrel-bent aluminized steel or stainless steel tubing and are designed with a unique tapered flange to fit the flanged down pipe found on 2015 models built after July 2014. The larger diameter and smooth transition bends allow for low turbulence, increasing horsepower, torque and improving throttle response. 
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