Name: Magnaflow Off-Road Tru-X X-Pipe (99-04 4.6L)
Brand: Magnaflow
SKU: 48003
Price: 521.80 USD
Availability: OutOfStock
Rating: 4.9 (32 reviews)

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.

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

Product Resources

Customer Photos (3) Customer Reviews (32) Questions (9) & Answers (20)

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.

MPN# 15445

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

What's in the Box

(1) X-pipe

Installation Info

Installation Time

(approx) 2 Hours

Difficulty Level:

Light to Moderate mechanical skill required.

Installation Guides

No guide available for this part yet. Find out how to get up to $200 for writing an install guide.

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

Tech Guides:

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.
No, only the 2004's need it. It says that specifically in the description.

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.
Yes

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.
Yes, you would need those extensions.

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.
Around 19 to the rear wheels and 18 ft-lbs torque
You should see a pretty decent ~10rwhp increase. Note, when you install a O/R X you will either need MIL eliminators or a tuner that has the ability to turn off your rear O2 sensors. And since you have an 04, you will need rear O2 sensor extensions.

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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

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.
No. this is a standard length x pipe for shorty headers. As to what shorty headers to go with that is complety up to your taste, preference, and pocket book. If going with " lts" aka long tube headers you need a shorty x pipe. the catback system is the same after you choose your headers and x pipe. also just a fyi if you have an automatic 99-04 gt longtubes wont fit as a direct bolt up it takes some modifications to make them fit. Shortys fit as a direct bolt on. Hope this helps.
Will not work with long tube headers. I used BBK shortie's they give the best fit.

Helpful (0) Show 2 more 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

The x pipe is widely known to produce more power on these cars than the h pipe. Just think of the way exhaust flows through both pipes and how much better and continuous the flow would be on the x pipe.
A x pipe will always add more performance then an h pipe. It's better airflow for the system. All an h pipe does basically is this. it allows the air flow to be equal to both sides when talking about the preasure. the x pipe is a much smoother flow, better sound in my oppinion and will yield more h/p.

Helpful (0) Show 1 more answer

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

That's exactly what the MILs are intended to do. Due to removing your cats, the MIL eliminators will turn off the corresponding CEL! I highly recommend a custom tune down the road though as it will help you see the full potential of the mods on your Mustang!
MIL eliminators prevent the check engine light from coming on, yes. MIL stands for 'malfunction indicator light'
Yes it will, mine never came on after the install. Still hasn't either.

Helpful (0) Show 2 more answers

Do i need mil eliminators if i have a bama tune? 2 answers

Nope! The MIL eliminators turn off your CEL caused by installing an off-road mid-pipe. If you have a Bama tune that encompasses this mid-pipe, you wouldn't need to purchase the MILs.
If you have a tuner, you do not need MIL eliminators because the tune gives you an option to turn off the rear O2 sensors.

Helpful (0) Show 1 more answer

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

no one in the world ever gets what they want, and that is beautiful

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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.

John718

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

Helpful (4) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 4
  4
- Bang for your Buck 4
  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!

Danny13

Year: 2001 Submodel: GT Sierra Vista, Arizona

Helpful (4) Thanks for your input!
- Loudness (Volume) 4
  4
- Exhaust Note 4
  4
- Fit & Finish 5
  5
- Bang for your Buck 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.

SsBuiltNinja

Year: 2002 Submodel: GT Downriver MI

Helpful (5) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  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.

04cobrawoo

Year: 2004 Submodel: Cobra

Helpful (4) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 3
  3
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.

99s2Fast4U

Year: 1999 Submodel: Cobra Chantilly, VA, USA

Helpful (5) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 4
  4
- Fit & Finish 5
  5
- Bang for your Buck 4
  4
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.

moosemike

Year: 2003 Submodel: Mach 1 willits ca

Helpful (4) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
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!!!

MSPD135

Year: 2003 Submodel: GT

Helpful (3) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
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.

King03Cobra

Year: 2003 Submodel: Cobra Yelm, WA, USA

Helpful (4) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
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!!!!

GANGSTANG04

Year: 2004 Submodel: GT N.Y.

Helpful (3) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 4
  4
- Fit & Finish 5
  5
- Bang for your Buck 3
  3
5/5

Installation Time: Shop Install

February 27, 2012

A Must Have

immediately felt performance increase and sounds absolutely nasty. highly recommended

Dmax

Year: 2000 Submodel: GT Cherokee,al

Helpful (3) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
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.

TonyL

Year: 2002 Submodel: GT Ohio

Helpful (3) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 5
  5
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
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 !!

Jon53

Year: 2003 Submodel: GT Rochester ny

Helpful (4) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 4
  4
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
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!

LanceH

Year: 2004 Submodel: GT Mobile, Alabama

Helpful (13) Thanks for your input!
- Loudness (Volume) 4
  4
- Exhaust Note 4
  4
- Fit & Finish 5
  5
- Bang for your Buck 5
  5
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!!

Ryan

Year: 2001 Submodel: Cobra Malven, PA

Helpful (3) Thanks for your input!
- Loudness (Volume) 5
  5
- Exhaust Note 4
  4
- Fit & Finish 4
  4
- Bang for your Buck 4
  4
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) Thanks for your input!
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.

Austin

Year: 2000 Submodel: GT

Helpful (4) Thanks for your input!
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) Thanks for your input!
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) Thanks for your input!
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.

Max

Year: 2002 Submodel: GT

Helpful (4) Thanks for your input!
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!!!

Domenic

Year: 2003 Submodel: Mach 1

Helpful (6) Thanks for your input!