The AFE 49-04053NM ATLAS 4" Downpipe-Back No Muffler Race Exhaust System for your 2015.5-2016 GM 6.6L Duramax is built and engineered to perform in the most extreme environments. This off-road race exhaust system is constructed from mandrel bent 4" aluminized steel tubing for maximum flow, increased horsepower, increased torque and lower EGTs. ATLAS exhaust systems are the perfect combination of performance, fit and value.
Installation is a Snap:
ATLAS exhaust systems utilize a 2-piece tailpipe design for a perfect fit by allowing adjustability at the tailpipe section. All systems use 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 muffler delete-pipe is used for a true race-inspired sound and maximum flow.
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:
ATLAS exhaust systems are constructed of 4" mandrel bent aluminized steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGTs.
- No Exhaust Tip
- "Straight-Pipe" No Muffler Kit
- 4" Aluminized Steel Construction
- Down-Pipe Back Race Exhaust
Warning: This free-flow race exhaust system requires the use of an aftermarket performance programmer with off-road tuning.
Fitment Note: This system will only fit models manufactured after July 2014 equipped with a flanged down pipe. Does not fit cab & chassis, fits Extended & Crew Cab Models.