2011-14 Ford Mustang American Racing Headers 1 3/4" Long Tube System w/ Off-Road X-Pipe - S197 - 5.0 by American Racing Headers

Mustang American Racing Headers 1 3/4" Long Tube System w/ Off-Road X-Pipe (11-14) 5.0

Details   |  Description   |  Reviews
  • 2011-2014 FORD MUSTANG 5.0 1-3
2011-2014 FORD MUSTANG 5.0 1-3

Install a set of quality headers while gaining peak power with American Racing Headers' 2011-14 Mustang GT header & off road x-pipe kit!

Item #ARH-10421

Everyday Low Price: $1,539.00

In Stock
Ships tomorrow!


Add to cart


  • Increased Performance
  • High Quality Fit & Finish
  • 100% Made In USA


  • 1 3/4" Primaries
  • 3" Off-Road X-Pipe
  • 304 Stainless Steel

What's in the Box

  • (1) ARH Longtube Header Pair
  • (1) Off-Road X-Pipe
  • (1) O2 Extension Pair
  • Installation Hardware

Product Description

American Racing Longtube Header Kit
Increase horsepower and torque in your 2011-2014 Mustang 5.0 with a high quality set of longtubes from American Racing Headers! ARH set the standard for quality in the exhaust world with their top notch products. This longtube header kit features 1 3/4" primaries to provide maximum flow over the factory manifolds. The headers flow into an off road x-pipe to replace the restrictive catalytic converters and provide an intimidating sound. The fit and finish of these American Racing Headers is second to none!

ARH Quality
American Racing Headers proudly makes all of their products in the USA. This 2011-2014 Mustang 5.0 header and mid-pipe kit is constructed entirely with U.S. made 304 stainless steel tubing. These headers start off with 3/8" thick flanges with tig-welded and hand ported inlets. The 1 3/4" primary tubes are all one piece design for 100% leak-free performance. These primary tubes flow into the included 3" off-road X-pipe. This combination will maximize flow, horsepower, and torque!

Emissions Note
This longtube header and x-pipe kit includes an off-road x-pipe. This x-pipe is intended for off-road use only and is not street legal.

Installation Note
ARH recommends reusing factory gaskets or replacing with Ford OEM set.

-Fits 2011-2014 Mustang 5.0

American Racing Headers Limited Warranty - Click Here

Product Reviews (1)

out of 5 stars
5 stars
1 reviews
5 stars    1
4 stars    0
3 stars    0
2 stars    0
1 star    0

1 of 1 REVIEWS
1 of 1 REVIEWS

5 Stars   Beauty AND Beast!!!
By on 6/3/2016
Added these to my 2014 GT w/ track pack this past weekend. Plan on 16+ hours unless you do this for a living. Worth every penny and minute of the install. Previously Dyno'd 381HP/375TQ with Flowmaster axle-backs and a Ford Racing Tune. I had these ARH headers and OR x-pipe ceramic coated and they went from beautiful to super model status. Installed along with a Steeda CAI (stock throttle body and intake manifold). On the same dyno i was able to now put down 416HP/395TQ (+35HP and +20TQ). With all that good news, the sound is still the best part! ARH + Steeda + LMR = Awesome!

Yes, I would recommend this item to a friend!

Was this review helpful to you?

Vehicle Applications

Ford Mustang - 2011 (11) - 2012 (12) - 2013 (13) - 2014 (14)

Products by Vehicle