aFe power introduces a true 4" Down-Pipe Back Large Bore-HD dual exhaust system for 2015.5-2016 GM Diesel Trucks with V8-6.6L (td) engine. This Large Bore-HD down-pipe back exhaust system is constructed from 4" mandrel bent stainless steel tubing for maximum flow, increased horsepower and torque. The down-pipe back is designed with a unique tapered flange to fit the flanged down pipe found on models built after July 2014. This kit uses a mitered merge collector along with a 24" muffler for maximum flow, then is finished off with dual 6" polished stainless steel clamp-on tips with a laser-cut stainless steel aFe power plates for an aggressive style.
Installation is a Snap:
This system uses factory mounting locations providing stability and hassle-free installation.
A unique high quality OE style tapered flange is used for a complete 360 degree sealing surface.
This exhaust system uses a mitered merge collector to convert the standard single exhaust to an aggressive dual exhaust.
A free-flowing 24" long muffler is used to absorb high pitch tones producing a powerful sound and unleashing all available horsepower and torque out of your rig.
OE style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The Bayonet tips holds the hanger bushing in place for an OE style fit that does not change with time. A bolt on hanger mount is used to support the driver side tube.
Flow and Performance:
Large Bore-HD exhaust systems are constructed of 4" mandrel bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower and torque.
Finishing off the exhaust are dual high luster, 6" polished stainless steel clamp-on tips with a laser-cut stainless steel aFe power plates for an aggressive style.
Note: These kits will only fit models manufactured after July 2014 equipped with a flanged down pipe. Does not fit cab & chassis, Fits 133.7 " to 167.7" wheel bases only.
This is a Race Only product that is to be used solely for competition, it cannot be used on vehicles that are operated on public streets, roads or highways. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state and federal laws. To complete the purchase of this item, aFe Power competition acknowledgement/liability release form must be filled out and submitted.
All aFe exhaust systems are engineered and manufactured in our Corona, California facility.