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Magnaflow Off-Road Tru-X X-Pipe (99-04 4.6L)

AmericanMuscle no longer carries the Magnaflow Off-Road Tru-X X-Pipe (99-04 4.6L). Please check out 1999-2004 Mustang Stock Length X-Pipes for an updated selection.
Market Price $573.99 You Save 9% ($52.19)
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  • Item 48003
  • MPN# 15445

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AmericanMuscle no longer carries the Magnaflow Off-Road Tru-X X-Pipe (99-04 4.6L). Please check out 1999-2004 Mustang Stock Length X-Pipes for an updated selection.

Features & Details

  • Improves exhaust flow for more power
  • Raspy Race Car Growl
  • For off-road, track use
  • 2.5" mandrel bent stainless steel tubing
  • Fits 99-04 GT, Bullitt, Mach 1 & SVT Cobras
Improves Exhaust Flow. Replace those power robbing factory catalytic converters and release hidden power with a Magnaflow Off-road X-Pipe. Featuring a Tru-X "X" style crossover and free-flowing mandrel-bent piping, this high performance x-pipe dramatically improves exhaust flow. Magnaflow's Off-road X-pipe out performs the restrictive stock catted H-pipe by producing more horsepower and torque at the rear wheels.

Race Car Growl. This free flowing Magnaflow Tru-X X-pipe for the 1999 to 2004 Mustang's not only increases power, but with its modern "X" crossover pipe design it also adds a crisp raspy, race car growl to the sound of your exhaust.

Magnaflow High Flow Construction. Magnaflow uses free-flowing 2.5" mandrel bent stainless steel tubing that has a consistent diameter throughout the entire length of the pipe, even at the bends to provide excellent exhaust flow that results in more power at the rear wheels.

Application. This Magnaflow Tru-X Off-road X-pipe is designed as a direct bolt-on for the 1999-2004 GT, 2001 Bullitt, 2003-2004 Mach 1 and 1999-2004 SVT Cobra with either aftermarket short tube headers or the stock manifolds and a dual catback exhaust installed. Intended for off-road, track use only, does not include catalytic converters.

Note: Coupon codes cannot be applied to this product.

Technical note: 2004 Mustangs require the use of 24" O2 sensor plug-in extender wires. This Magnaflow product is intended for off road use, and is not legal for use in emission restrictive states.

Fitment: 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) X-pipe
Installation Info
Tech Specs
Mid Pipe Specifications
Style Mid Pipe: Standard length "X" Type Headers Required: Shorty or stock manifolds
Piping Material: Stainless Steel Piping Size: 2.5"
Catalytic Converter: "No" - For off-road use only Fitment: 1999-2004 GT, Bullitt, Mach 1 and Cobra Mustangs
Will it fit my Mustang?
  • Bullitt - 01
  • Mach 1 - 03, 04
  • Cobra - 99, 01, 03, 04
  • GT - 99, 00, 01, 02, 03, 04

Fits GT, Mach 1, Bullitt, and Cobra

Most Helpful Reviews

A beast of a sound !

Simply amazing ! the air flow and volume is way better....it sounds amazing and doesent have a rhaspy sound. It fits right up to a stock system if you are just purchasing the x pipe. I went with bbk shorty ...

Read More
Helpful (2)

sounds great

I had heard complaints of other systems being two-piece and without welding they leak. So I bought this system, and am I ever Impressed. I have an auto transmission and i did not need the O2 extensions ...

Read More
Helpful (2)

Overall Rating 4.9 out of 5 stars
Read All 32 Reviews

Customer Photos (3) Submit Your Photo

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9 Questions / 13 Answers

Ask a Question

Do I need O2 extensions with this x-pipe for my 2002 GT?


  • No but your probably going to need the mil eliminators if you go with the off road x-pipe.


Show 1 more answer Helpful (1)

Transmission? Is this compatible with either a manual or automatic transmission?


  • This X Pipe is designed for manual or automatic.


Show 1 more answer Helpful (0)

Does this work with a V6? I have a V6 that I'm putting a GT engine in, will this work for me?


  • With a 4.6L engine (like the 2003 GT), given that the pipes fit the frame of the undercarriage, this will work with your car.


Helpful (0)

O2 extension needed for my 04 mustang ? I have an 04 mustang gt and bought some magnaflow off-road x-pipe I'm going to install it with stock headers and was told that I was ganna need mil eliminators and o2 extensions ? Will the mil eliminators do the job to extend the space needed or will I have to purchase both mil eliminators and o2 extensions ?


  • My friend has a 04 GT as well, he needed both MIL eliminators and extenders when he installed his x pipe.


Show 1 more answer Helpful (0)

Horsepower gain ? How many horsepower will a magna flow x-pipe will it gain on 04 mustang gt ?


  • This x-pipe, by itself should net a 10-15 horsepower gain. Coupled with other mods, such as a CAI and a BAMA tune, you should expect anywhere from 25-30 hp.


Show 2 more answers Helpful (0)

longtube headers Would these work with long tube headers even though it says to go with shortys and if it doesnt work what shortys headers would be best?


  • No, this x pipe will not work with long tube headers. It will fit with shorty headers though. If you want longtubes you will need a matching 'shorty' midpipe.


Show 2 more answers Helpful (0)

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Customer Reviews (32) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Loudness / Volume 4.857143 4.9
  • Exhaust Note 4.571429 4.6
  • Fit & Finish 4.857143 4.9
  • Bang For Your Buck 4.428571 4.4

  • 5/5

    Installation Time: Less than 1 Hour

    September 27, 2012

    A beast of a sound !

    Simply amazing ! the air flow and volume is way better....it sounds amazing and doesent have a rhaspy sound. It fits right up to a stock system if you are just purchasing the x pipe. I went with bbk shorty headers, magnaflow tru x x pipe and magnaflow catback system. Magnaflow makes an AMAZING product, has a great sound, and added a huge h/p performance over my stock system.


    Year: 2002 Submodel: GT Downriver MI

    Helpful (2)

  • 5/5

    July 16, 2011

    sounds great

    I had heard complaints of other systems being two-piece and without welding they leak. So I bought this system, and am I ever Impressed. I have an auto transmission and i did not need the O2 extensions to make it fit. I was missing 2 nuts. Luckily they were just 10mm flange nuts that i picked up at a local store. I installed this with my family in a garage in just a couple hours. The sound is great! I was hesitant because I had a magnaflow (not magnapack) catback and didnt want to loose that sweet low sound. At idle and low RPMs, its still fairly low/quiet but if you give her the juice, you will really notice the sound and performance! I live in South Dakota. I ordered it on Monday, and got it Friday. Thanks AM for a great product!!!!

    Jason Meyer

    Year: 2002 Submodel: GT

    Helpful (2)

  • 5/5

    March 16, 2011

    easy install

    this install was as described, very straight forward. only issue is that noone mentioned how difficult it is to get to the front 2 oxygen sensors, especially to plug back in. hint is to use a very long small tipped screw driver (at least 2 feet), stick the blade into the clip and then guide up and into the plug. finely figured this trick out and reinstalled sensors in about 5 minutes, just took me 2 hours to figure this out. X-pipe fit perfect and sounds great.


    Year: 2004 Submodel: GT

    Helpful (2)

  • 5/5

    December 17, 2010

    Great Product

    I bought this and added a Pypes Cat back exhaust system to it. The combination is amazing. Everything bolted right up with perfect fitment. Came with all of the needed gaskets and hardware.

    Zack Sams

    Helpful (4)

  • 5/5

    March 16, 2009

    Awesome with SLP Catback

    I had this Offroad Xpipe on my 2004 Mustang GT along with a SLP LM1 Catback and you could literally wake the dead. Dogs would bark and then take off running, birds in parks would take off flying, old neighbors would shake their canes. Excellent product, fit and finish was top notch.

    Justin Bradford

    Year: 2004 Submodel: GT

    Helpful (18)

  • 5/5

    Installation Time: Afternoon

    November 04, 2011

    Get the most out of your Mustang with the Magnaflow Tru-X X-pipe!

    Get back those wasted horsepower by getting rid of your catalytic converters! The Magnaflow X-pipe replaces the stock mid pipe and is an easy bolt-on mod that gives your Mustang more horsepower and allows the engine to breathe easier. Without catalytic converters hindering your engine's performance, it can also produce a very aggressive race car growl. Don't bother with multiple piece and clamped mid pipes that leak and cause issues. The single piece Magnaflow is very simple to install and bolts directly to your exhaust system. Be sure to get a set of plug-in MIL eliminators to keep that pesky engine light off as well as the 02 sensor extension kit if your Mustang is a 2004 model. The Magnaflow Tru-X X-pipe is one of the best and easiest modifications you can do to add horsepower and a raspy growl to your Mustang!


    Year: 2004 Submodel: GT Mobile, Alabama

    Helpful (10)

  • 5/5

    June 13, 2010


    I really enjoy the sound that this produces without cats. When AM says it is a Tru-X it is. Fitment is amazing and the Power is there. On a Cobra Mustang it sounds mean. I would highly recommend this product for no leaks. i got rid of of Bassani because it leaked so bad. Great Product AM!!


    Helpful (9)

  • 5/5

    July 02, 2010

    2002 GT

    Very quick install time. Took me a about 2 hrs, including the time for cool down and an oil change. Did it by myself too. It does state it comes with everything, however mine did not come with a passenger side manifold to x pipe gasket. I was able to reuse the old one however. Sounds so much better and runs better too.

    Max Powers

    Year: 2002 Submodel: GT

    Helpful (7)

  • 4/5

    April 11, 2008


    The cats on my stock midpipe must\\\\\\\'ve been partially clogged because I am now getting a lot better mileage with this o/r pipe and the Magnapacks. My exhaust is much louder now.


    Helpful (7)

  • 5/5

    July 14, 2010

    1999 Cobra

    Sounds great and easy to install. My only beef is that it didn't come with any gaskets.

    Jon Manning

    Year: 1999

    Helpful (7)

  • 5/5

    March 16, 2011

    Monster Mach

    This is a amazing product.. Sounds CLEAN and is louder than elephants having sex... makes my mach 1 sooo much nicer

    Tim Darrah

    Year: 2004 Submodel: Mach 1

    Helpful (5)

  • 5/5

    April 22, 2010


    This x pipe bolts right up to my stock manifolds and borla stingers and sounds great! They include all the nuts and bolts and ships as 1 peice, no clamps! excellent product.

    Steven G

    Helpful (5)

  • 5/5

    May 14, 2011

    Don't buy the Pypes

    Just installed this pipe on my stang. Replaced the Pypes O/R X pipe I bought here a year ago. Leaking beotch. As soon as I took this Magnaflow out of the box, it screamed quality. Ever hear the expression, you get what you pay for? Well, this is no exception. My Pypes pipe was a constant leaker. Up in air multiple times and even to the exhaust shop multiple times trying to get that piece of crap to stop leaking. Like a monkey bent the tubing. This pipe practically floated right into place. The sound is a tad louder than the Pypes and really wakes the dead. After installing the Ford C-Springs, and this X-pipe, paired with my Borls stingers, I went for a ride. About 9pm. Thought I would let ol'lady and kids hear the new exhaust. Pulled nice loud burnout in front of my place in real quiet neighborhood. Then straight to garage to pack up for the night. Man, it didn't take long before the cops were cruising the neighborhood. Neighbors better get used to it. Sounds too damn good. Worth every penny.

    Errol S.

    Year: 2003 Submodel: GT

    Helpful (4)

  • 5/5

    May 17, 2010

    2000 GT

    Great X-Pipe! Fit perfectly and sounds perfect too!


    Year: 2000 Submodel: GT

    Helpful (4)

  • 5/5

    March 17, 2011

    Great product

    awsome product.it says you need O2 extenders but you don't it was a direct bolt up. Thank's AM for the super fast shipping!!!


    Year: 2003 Submodel: Mach 1

    Helpful (3)

  • 5/5

    April 19, 2010

    Installation and sound

    This pipe bolted on my 2000GT in 1 hour and the fit was perfect.shipping was 3 days as stated. The sound and power from this X pipe is amazing.

    Mike Racine

    Year: 2000 Submodel: GT

    Helpful (4)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    November 30, 2012

    Excelent product! Sounds great!

    I recieved this o/r x-pipe for my 17th birthday from my dad and I couldn't be any happier. The sound is great; has that deep muscle car idle and a mean scream at throttle wide open even with the stock cat back exhaust. Matched with a bbk cold air intake I can feel the power beneath my foot especially between 3000 and 4500 rpms. Highly recommend it!


    Year: 2001 Submodel: GT Sierra Vista, Arizona

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    August 09, 2012

    Holy S***

    This is by far the loudest exhaust system i have ever heard, when people on here say it will wake the dead there not lying. The best part is bama came through with a new custom tune to turn off O2 codes, no check engine light for me, but if your going to buy this get ready for tickets and a lot of smog. all and all very good product, would buy it again if i had to.


    Year: 1999 Submodel: Cobra Chantilly, VA, USA

    Helpful (1)

  • 5/5

    June 05, 2011

    Great X Pipe!

    Only buy this mid-pipe if you want attention. At low rpm's it has a really deep muscle car sound to it. When you step on it watch out cause everyone will hear you coming. Matched with my borla stingers...unbeatable sound!

    Rick Penatzer

    Year: 1999 Submodel: GT

    Helpful (1)

  • 5/5

    January 30, 2011

    99 Cobra

    Great mod. Combined with CAI and Magnaflow mufflers, it will awake the beast within. It turns heads everywhere I go. Great fit, easy to install.


    Year: 1999

    Helpful (1)

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