The Large Bore-HD Down-pipe back exhaust system is engineered to perform in the most extreme environments. This system is constructed from 5" mandrel bent stainless steel tubing for maximum flow, increased horsepower, increased torque and lower EGT’s. This system uses high quality band clamps, OE-style bayonet hangers and includes an adjustable hanger clamp for a tight secure fitment. This system is available with a free-flowing 24" long muffler and includes a 6" diameter black stainless steel clamp-on tip with a laser-cut stainless steel aFe power plate for an aggressive style.
Installation is a Snap:
This Large Bore-HD System Includes an extension pipe and an adjustable hanger for a perfect fit. This kit uses factory mounting locations providing stability and hassle-free installation.
High quality OE style flange and band clamps are used for a complete 360 degree sealing surface.
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 tip holds the hanger bushing in place for an OE style fit that does not change with time.
Flow and Performance:
This Large Bore-HD exhaust system is constructed of 5" mandrel bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGT’s.
6" Black Tip:
Finishing off the exhaust is a 6" diameter black stainless steel clamp-on tip with a laser-cut stainless steel aFe power plate for an aggressive style.
This System Fits:
Crew Cab/Short Bed, Crew Cab Long Bed, Extended Cab/Short Bed, & Extended Cab/Long Bed
Note: This is a "Race Only" product used solely for competition. 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. This system also requires an aftermarket electronic module to work properly with the vehicle.
All aFe exhaust systems are engineered and manufactured in our Corona, California manufacturing facility.
Year Make Model SubModel Engine Fuel 2005-2005 GMC Sierra HD 2500HD/3500HD (LLY) Duramax Turbo Diesel V8 6.6L Diesel 2006-2007 GMC Sierra HD 2500HD/3500HD (LLY/LBZ) Duramax Turbo Diesel V8 6.6L Diesel 2008-2010 GMC Sierra HD 2500HD/3500HD (LMM) Duramax Turbo Diesel V8 6.6L Diesel
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