AFE Power Large Bore-HD 4" Downpipe Back Stainless Steel Exhaust System

2001 - 2007 6.6L GM Duramax LB7 LLY LBZ

$527.00
SKU NWD-49-14003
Options

49-14003 / 49-14003NM

The Large Bore-HD exhaust 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 with or without a muffler. Large Bore-HD exhaust systems are the perfect combination of performance, fit and value.

  • Features
  • Videos
  • Instructions
  • Vehicle Fitment

Installation is a Snap:
All systems use factory mounting locations providing stability and a 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 muffler-delete pipe is used for a true race-inspired sound and maximum flow.

OE Fitment:
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.

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 LBZ