AFE Power Large Bore-HD 5" Downpipe Back Exhaust System

2001 - 2004 6.6L GM Duramax LB7
2004.5 - 2005 6.6L GM Duramax LLY
2006 - 2007 6.6L GM Duramax LLY / LBZ

$793.00
SKU NWD-49-44007-P
Options

49-44007-P / 49-4407-B

A true 5" from the down-pipe back, the new Large Bore-HD exhaust is engineered to perform in the most extreme environments. This system is constructed from mandrel bent 5” stainless steel tubing for maximum flow, increased horsepower, increased torque and lower EGT's.

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? sealing area. A 24" free-flowing straight-through designed muffler is used to produce a deep, powerful sound.

  • Features
  • Videos
  • Instructions
  • Vehicle Fitment

Installation is a Snap:
Large Bore-HD 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.

Leak-Free Seal:
High quality OE style flange and band clamps are used for a complete 360 degree sealing surface.

Aggressive Sound:
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.

Perfect Fit:
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:
Large Bore-HD exhaust systems are 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.

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.

Year
Make
Engine

2001 - 2004

GM Duramax

6.6L LB7

2004.5 - 2005

GM Duramax

6.6L LLY

2006 - 2007

GM Duramax

6.6L LLY / LBZ