AFE 49-14003NM Large Bore HD 4" Downpipe-Back Exhaust (No Muffler)
2001-2007 GM 6.6L Duramax
The AFE 49-14003NM Large Bore HD 4" Downpipe-Back Exhaust (No Muffler) for your 01-07 GM 6.6L Duramax is engineered to perform in the most extreme environments. This system is constructed from mandrel bent 4" stainless steel tubing for maximum flow, increased horsepower, increased torque and lower EGT’s. The system is available in a 4" down-pipe back without muffler. LARGE Bore HD exhaust systems are the perfect combination of performance, fit and value.
Installation is a Snap:
All systems use factory mounting locations providing stability and a 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 hangers with bayonet tip are used to maintain a stable pipe location during high vibration and high heat conditions.
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, torque and lowering EGT’s.
- 4" Stainless Steel Construction
- No Muffler - "Straight Pipe System"
- Exhaust Tip Not Included
Customer Reviews - Include your order number for a chance to win a $100 GiftCard