Ford Mustang GT Exhaust System, Off -Road (2005-2009)

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Part #: 401339
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Product Features

  • Improves the power, fuel efficiency, and sound of your Mustang
  • Works with 2005-2009 Ford Mustang GTs
  • Requires ROUSH® Rear Fascia for 2005-2009 Mustangs (part #401271)
  • More aggressive exhaust sound
  • Made of T-304 stainless steel for resistance to corrosion and staining
  • Mandrel-bent tubing for increased air flow
  • Bolt-on axle-back exhaust system attaches to the factory midpipes and requires no cutting
  • Check local noise ordinances for legality
  • Part #401339

This Ford Mustang Exhaust (Off-Road System) from ROUSH® fits 2005-2009 models.

This is a Off-Road system that produces a loud, throaty-sound. The exhaust system also improves the power, fuel efficiency of you car.

This Ford Mustang exhaust kit is made of T-304 stainless steel, providing for resistance to corrosion and staining and features exhaust tips, mufflers, and required hardware for installation. The exhaust tips of this system fit (and require) the ROUSH Rear Fascia for 2005-2009 Mustangs (part #401271). This bolt-on axle-back exhaust system attaches to the factory midpipes and requires no cutting.

The term “Off-Road” for this exhaust kit means that the sound level is above the maximum level allowed on a production vehicle. If you already have the "legal" version of this exhaust on your car and you would like to upgrade to the "off-road" system, you can purchase the mufflers of this system separately under part #401340 (this package doesn't include the exhaust tips). If you are looking to get the great sound of a ROUSH exhaust system on your 2005-2010 Mustang GT without changing your rear fascia, you can do so with the ROUSH Extreme Exhaust system (Part #421915).

Mustang: 2009, 2008, 2007, 2006, 2005

Customer Reviews:

Average Rating: 5 / 5
Rating of 5 out of 5 stars
(1 reviews)   >> Write a review


Rating of 5 out of 5 stars 5 / 5

By   September 30th, 2012

Proud owner of a supercharged 07 Mustang with the off road exhaust that was installed at the dealership. Well, at 60 to 68 mph ya need to speak up if you want to be heard over the drone. At 70 it calms down to an acceptable level. Love the car and the sound....but really, if you do highway driving do yourself a favor and go for the legal exhaust.. I have put up with it for 23k miles and am going to change it soon. Love the car, the guys at ROUSH are trying to warn you by saying off road. Listen to them, they know what they are saying. Steve, 2007 Roush Roadster

* Please note that prices stated here are only for sales within the continental United States only ordered via the web site. Prices for other territories, such as Canada, may vary due to shipping fees, duties, and other factors. Please also note that orders placed on the web site can only be shipped to areas within the continental U.S.