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

Item 48003
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.
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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: Details

CA Residents: WARNING: Cancer and Reproductive Harm -

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

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      Questions & Answers (9)

      5 Top Rated Questions

      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.

      Helpful (1) Show 1 more answer

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

      • This X Pipe is designed for manual or automatic.

      Helpful (0) Show 1 more answer

      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.

      Helpful (0) Show 1 more answer

      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.

      Helpful (0) Show 2 more answers
      Post Your Question
      4 More Questions
      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? 3 answers
      which off road pipe produces the most hp for a 01 gt the x-pipe or the h-pipe? years ago i put an h-pipe on my 87 gt and i really could fill the differance. i was wondering if anyone had ever did a comparison of the x-pipe to the h-pipe? 2 answers
      what is the mil eliminater? i want to buy an x-pipe but dont have a tune will the mil eliminater keep me from getting a check engine light? 3 answers
      Do i need mil eliminators if i have a bama tune? 2 answers

        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

          August 17, 2013

          O/r tru x pipe

          I received this x pipe in 3 days and installed them myself using a lift. It took me about an hour and god **** this exhaust is loud lol the car even felt a noticeable gain I have these paired with a magnaflow magnapack catback reall throaty and deep. sounds like raging elephants at 3000 rpm it's crazy. Just a word of advice u will need a flange for passenger side connecting to headers.


          Year: 2004 Submodel: GT New York, NY, USA

          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 (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 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 (5)

        • 5/5

          Installation Time: Less than 1 Hour

          August 15, 2012

          paired with magnaflow catback 04 cobra! amazing

          couldnt have asked for a better fit, this tru-x replaced my bbk garbage x pipe and the quality right off the bat is much better. the rasp created from this x pipe is perfect right between 2-3k rpm. would definately suggest to buy it.


          Year: 2004 Submodel: Cobra

          Helpful (4)

        • 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 (5)

        • 5/5

          Installation Time: Less than 1 Hour

          July 07, 2012

          Best x pipe

          I've had several runs with different exhaust systems and this on right here is the best sounding exhaust system I've purchased it's so nice fits well sound is impeccable.


          Year: 2003 Submodel: Mach 1 willits ca

          Helpful (4)

        • 5/5

          Installation Time: Less than 1 Hour

          June 18, 2012

          Magnaflow X

          I decided to purchase this X because I had Magnaflow Axel Backs already. I must say it's a great sounding combo! Above 2K RPM's it has that classic stang sound, that raspy eat your face growl. Personally, I don't consider this combo to be very loud. It's got a great tone and the volume is just perfect. When cruising in 5th gear you can barely hear it inside the cabin. When you step on it people definitely hear you coming. I purchased the MIL Eliminators along with the X and at approximately 90 Miles later, no engine lights. Great product American Muscle!!!


          Year: 2003 Submodel: GT

          Helpful (3)

        • 5/5

          Installation Time: Afternoon

          April 29, 2012

          Amazing Fit

          I have a 03 Cobra, and this is my 2nd pipe, had the Summit brand, didn't fit was about 10" longer then the stock pipe, this was easy install took me less then 90 mins to take the stock pipe out and put this one in, was the exact same measurements as the stock one, bolted right in, didn't have to replace the flange studs, no leaks as well, good buy for a terminator.


          Year: 2003 Submodel: Cobra Yelm, WA, USA

          Helpful (4)

        • 4/5

          Installation Time: Less than 1 Hour

          March 05, 2012

          04 mustang gt will need 02 extentions on rear 02 scenors also gasket for header on passenger side

          04 mustang will need o2 scencor extention on drivers side its about six inches too short. Also you will need to buy a gasket for the header to the x pipe on the passenger side. The install was very easy took less than a hour, The hard part was getting the bolts off the stock h pipe to the header NEEDED TO USE HEAT TO BREAK THEM LOOSE. American Muscle is the best very fast shipping and very good price i wouldnt buy my mustang parts anywhere else!!!!


          Year: 2004 Submodel: GT N.Y.

          Helpful (3)

        • 5/5

          Installation Time: Shop Install

          February 27, 2012

          A Must Have

          immediately felt performance increase and sounds absolutely nasty. highly recommended


          Year: 2000 Submodel: GT Cherokee,al

          Helpful (3)

        • 5/5

          Installation Time: Afternoon

          February 03, 2012

          Love it!

          Dang, perfect combination with Borla Stingers, Accufab TB and Plenum, and Steeda CAI. The exact sound I was looking for. If you like to hear your V8, look no further. Might post a video on Youtube..check it out.


          Year: 2002 Submodel: GT Ohio

          Helpful (3)

        • 5/5

          Installation Time: Afternoon

          November 29, 2011

          So loud

          Wow sounds amazing so loud if you straight piped your catback like I did you will regret it with the slp loudmouths it is ear piercing can be herd from over a mile away not even wide open. Great fit and instal and sounds mint def reccomond !!


          Year: 2003 Submodel: GT Rochester ny

          Helpful (4)

        • 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 (13)

        • 5/5

          Installation Time: Afternoon

          September 01, 2011

          Sounds Mean!

          Install took a little over an hour on this but went fairly well, with having the 4v motor it took some wiggling to get it to seat right on the flanges. Very happy with the sound!!


          Year: 2001 Submodel: Cobra Malven, PA

          Helpful (3)

        • 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 (5)

        • 5/5

          June 09, 2011

          Sound amazing

          Put these on with the magnapacks and it sounds like a beast from hell. It wakes the neighbor and scares off dogs.


          Year: 2000 Submodel: GT

          Helpful (4)

        • 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 (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 (8)

        • 5/5

          April 03, 2011

          Off Road X

          The off road X fit perfect with my stock manifolds and aftermarket MAC flowpaths. I wish they would tell you that it doesn't come with gaskets, but only one is needed on the passenger side manifold. Overall, a great sound improvement and great product.


          Year: 2002 Submodel: GT

          Helpful (4)

        • 5/5

          March 17, 2011

          Great product

          awsome 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 (6)

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