aFe ATLAS 4 IN Aluminized Steel Down-Pipe Back Exhaust System GM Diesel Trucks 01-07 V8-6.6L (td) LB7/LLY/LBZ - 49-04001NM

The new ATLAS exhaust is engineered to perform in the most extreme environments. This system is constructed from mandrel bent 4" aluminized steel tubing for maximum flow, increased horsepower, increased torque and lower EGTs. The 2-piece tailpipe and bayonet style hangers provide a hassle-free installation. To provide a leak-free seal, OE style band clamps are used that offer a 360 degree sealing area. Systems are available in 4" down-pipe back with or without muffler. ATLAS exhaust systems are the perfect combination of performance, fit and value.