aFe Atlas Exhaust 5in DPF-Back Al Steel 11-13 GM Diesel Trucks V8-6.6L (td) LML (Blk Tip)aFe Atlas Exhaust 5in DPF Back Al Steel 11 13 GM Diesel Trucks V8 6. 6L (td) LML (Blk Tip) Interested in a new exhaust system? Check out the ATLAS DPF Back exhaust system by aFe. This system is constructed from 5 in. mandrel bent aluminized steel tubing. Smooth transition bends allow for low turbulence, increasing horsepower, toque and lowering EGTs. Uses high quality band clamps and OE style bayonet hangers. This unit uses all factory mounting
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