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Magnaflow Catted Tru-X X-Pipe (99-04 4.6L)

28 Reviews
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  • Item #48026
  • MPN# 93335

  • Market Price $706.99
  • You Save 9% ($64.88)
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  • Improves Exhaust Flow for More Power
  • Raspy Race Car Growl
  • High-Flow Ceramic Catalytic Converters Included
  • 2.5" Mandrel-Bent Stainless Steel Tubing
  • Fits 99-04 GT, Bullitt, Mach 1 and SVT Cobra
Improves Exhaust Flow. Magnaflow's X-Pipe uses free-flowing mandrel-bent piping with a Tru-X "X" style crossover and high-flow catalytic converters to improve exhaust flow and to produce significantly more horsepower and torque at the rear wheels than the restrictive stock catted H-pipe.

Race Car Growl. This free flowing Magnaflow Tru-X X-pipe for the 1999 to 2004 4.6L 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 2.5" mandrel bent stainless steel tubing that has a consistent diameter throughout the length of the pipe, even at the bends to provide excellent exhaust flow that results in more power at the rear wheels. The included high flow ceramic catalytic converters far out perform the restrictive stock cats to provide a significant increase in horsepower and torque.

Application. This Magnaflow Tru-X Catted 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 Mustangs with either aftermarket short tube headers or the stock manifolds and a dual catback exhaust installed.

Note: Coupon codes cannot be applied to this product.

Technical note: 2004 Mustangs require the use of 24" O2 sensor plug-in extender wires.

Fitment: 1999 2000 2001 2002 2003 2004 Details

What's in the Box
Hardware included:
  • (4) nuts already threaded on for catback connection
  • **reuses stock header connection hardware**
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: "Yes" 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

Great Product

I recently bought this product and WOW did it make a difference. More horsepower and a more aggressive note tone. Fits perfect! I would highly recommend this product to those looking to upgrade from there ...

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Helpful (1)

Improving exhaust flow

After replacing the stock 4 cat "H" pipe you will hear an increased rumble but the real gain is in upper RPM performance. From 4 to 6000rpm the engine can breathe and you will feel the car pull harder. ...

Read More
Helpful (13)

Overall Rating 4.9 out of 5 stars
Read All 28 Reviews

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7 Questions / 13 Answers

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fitment On Magnaflow's website, it says that this item is for 99'-03'. But here it states to 04'. I have an 04' GT, will this fix my car or is for 03' or later? Also, which ceramic shorty headers do you recommend with this x pipe if it does fit my 04' GT?


  • This will absolutely fit your 2004 GT. You will need the O2 extensions though so make sure you pick up a set of those. As far as which shorties, I'd recommend getting a tuned length as they will offer a bit more performance over the standard shorty. Also, ceramic headers will keep the engine temps lower giving better performance as well. Hope this helps!!


    Good Answer (2) (0)

Show 2 more answers Question Resolved

Will this fit on a 2003 gt convertable with an automatic transmission?


  • Yes, The Magnaflow Catted Tru-X X-Pipe will bolt right into your 2003 GT with an automatic. This installation can be done at home but it`s best to find a local exhaust shop who`ll install it for you because in order to get it tucked up nicely under your car, the vehicle needs to be up on a lift. Also, the exhaust manifold to the stock H-pipe nuts & the upstream 02 sensors are almost impossible to remove by using a pair of jack stands in your garage or driveway. Remember to purchase a passenger side exhaust manifold to X pipe gasket because the X pipe does not come with one. These can be purchased at your local auto parts store. Good luck.


    Good Answer (3) (0)

Show 2 more answers Question Resolved

Is this CA legal?


  • This x pipe is NOT CARB approved. I've been looking for an x pipe that is Ca legal but so far haven't found any.


    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

If i get this x pipe. Will I need to worry about passing emissions inspection For Pennsylvania?


  • The Magnaflow Catted Tru-X X-Pipe (99-04 4.6L) will pass most emission testing. However you will need to check with your local authorities as each state will be different.


    Good Answer (0) (0)

Question Resolved

Will this fit with SLP Loudmouth Catback Exhaust? Are they worth buying together?


  • Knowing the nature of these companies, both the magnaflow x pipe and the slp exhaust kit will be stock replacement parts, which means they would bolt together, ive seen mustangs with mixed exhaust kits before so this should not be a problem.


    Good Answer (2) (0)

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Is a tune required when replacing the stock cat system? I am thinking of replacing the stock catted system with a Magnaflow catted X-pipe set up. Is a re-tune required with the new system? Thanks. Dick


  • No. You don't have to do a tune for the exhaust system. Now if you were doing headers and a full system with a cold air kid I would advise it because you will maximize you upgrades that way, but if your just putting on the xpipe you don't need to.


    Good Answer (2) (0)

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Customer Reviews (28) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Weekend

Installation Cost:$100-$250

  • Loudness / Volume 4.3125 4.3
  • Exhaust Note 4.625 4.6
  • Fit & Finish 4.6875 4.7
  • Bang For Your Buck 4.4375 4.4

  • 5/5

    Installation Time: Afternoon

    April 19, 2016

    Great Product

    I recently bought this product and WOW did it make a difference. More horsepower and a more aggressive note tone. Fits perfect! I would highly recommend this product to those looking to upgrade from there stock pipes.


    Year: 2001 Submodel: GT

    Helpful (1) (0)

  • 5/5

    July 21, 2010

    magnaflow catted x pipe

    Sounds great on my 04 GT makes heads turn I highly recommend this product. Shipping is fast order it on a Monday got it Thursday..

    eric morgan

    Year: 2004 Submodel: GT

    Helpful (13) (0)

  • 5/5

    July 15, 2010

    Improving exhaust flow

    After replacing the stock 4 cat "H" pipe you will hear an increased rumble but the real gain is in upper RPM performance. From 4 to 6000rpm the engine can breathe and you will feel the car pull harder. Magnaflow has great quality, easy install as the X-Pipe matched up. Did not need an exhaust gasket on the left side as the stock unit is steel and worked without leaks.

    Jamie Marchesano

    Helpful (13) (0)

  • 5/5

    Installation Time: Shop Install

    February 11, 2012

    Perfect Fit Catted X Pipe

    Hi, I just wanted to give my opinion on this catted X pipe. I have a 2001 Mustang GT with an automatic transmission. This item bolted up perfectly to my stock exhaust manifolds without any problems. Ground clearance was a little better than stock and it tucked up very nicely to the floorpan without and rubbing issues. To save yourself any frustration or headaches, remember to purchase a passenger side exhaust manifold flange gasket. Some people might say that you can reuse your old one but, why take a chance on a possible exhaust leak. In my opinion, the best one is made by FelPro and the part# is 61203. As far as installing this item in your garage or driveway, it can be done but there is no way you`re going to be able to properly align and tuck this item up high enough using ramps or 2 pair of jack stands. Also, removing the passenger side upstream 02 sensor and H pipe to exhaust manifold nuts are not for the faint of heart so be warned. Just budget another 50.00 - 100.00 dollars to have a local exhaust shop install it for you if you don`t want to tackle this install yourself. My shop knocked it out in 40 minutes and the cost was 75.00 Keep up the good work American Muscle.


    Year: 2001 Submodel: GT Georgia

    Helpful (8) (0)

  • 5/5

    June 28, 2009

    Worth it!

    Installed one today. Piece of cake (you will need the right side exhaust manifold/pipe gasket - NAPA had to order one for the next day). It fit perfectly and was EZ to install!!!! We will see if my \'01 passes PA emissions this week?


    Year: 2001

    Helpful (6) (1)

  • 5/5

    August 21, 2008

    Best X-pipe on the market.

    I have this X pipe on my 04 Mustang GT. It sounds great, I can rev it a little and heads turn like crazy. Great product I love mine.

    Matt Grissom

    Year: 2004 Submodel: GT

    Helpful (3) (0)

  • 5/5

    December 18, 2010

    x pipe sounds great

    x pipe sounds great easy to install and i really think becuse of the x under the trans it helps to warm my t3650 for better shifts i think note the parts store gasket requiered for the rt side that i purchased did not look like it would seal as good as the gasket that came with my bbk shortys so i reused that old gasket and i dont seem to have leaks so far the parts store gasket had crush bump on only one side as apposed to the bbker having both sides bumped.

    tom collins

    Helpful (5) (2)

  • 5/5

    April 03, 2010

    Great Product

    I've owned several Magnaflow products, and like the others this is a quality item. Well made, perfect fit, no issues at all during install. Great sound, exactly what we wanted. And cudos to American Muscle - I ordered on Friday afternoon and it was at my house on Monday morning, with regular ground shipping. You can't beat that!


    Helpful (4) (1)

  • 5/5

    Installation Time: Afternoon

    January 24, 2012

    Catted X-pipe

    I installed my Magnaflow catted x-pipe about a week ago and the exhaust tone is quite a bit more aggressive especially partnered with my Borla stingers. Here soon i need to adjust it to get a slight leak out, but it was probably my fault. I cant wait till the carbon builds up and get to hear the real potential of this x-pipe. I first drove it with my 200lb and 300lb friends in the car and it almost was as quick as it was before with just me in the car! I felt a great increase in power especially when i hit 4000 rpm. it rips!! Thank you AM you never let me down


    Year: 2001 Submodel: Cobra Washington state

    Helpful (2) (0)

  • 5/5

    May 27, 2008

    Great X-Pipe

    This is a great x-pipe. Awesome sound without the bad smell that accompanies pipes with no cats.

    Joseph LaTorre

    Helpful (2) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    January 23, 2016

    They Hear Me Now

    Loving the deep tone. This X-pipe has been installed for about a week and does she sound great. My exhaust set up consist of stock headers, magnaflow catted X-pipe (this product), and chambered magnaflow catbacks. Great deep note at idle and good rumble while at cruising speeds. Haven't been able to go WOT due to me in the stages of breaking in a new Mcloed clutch. Few hundred more miles to break-in and we will see what she can really do. You will love this product, no buyers remorse. Be sure to purchase the O2 sensor extension cables, had to do some modifications to my wiring sense I didn't purchase them. Considering upping my fuel injectors to 24 lb/hr by Ford Racing. After this install I get the feeling my pony is starving for fuel, seems to lag when approaching hills. All mods consist of KandN CAI, 70mm TB, Intake Plenum, SR Coils, and Bama Tune. Thanks American Muscle.


    Year: 2004 Submodel: GT Garden City, KS

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    November 14, 2013

    Off Road Only

    Pros: This exhaust made a drastic change in the exhaust note of my 01 GT. It added a much deeper and more aggressive tone that you cant help but show off at red lights. The performance is definitely noticeable with an increase in throttle response. Cons: I wanted to put down the extra money to have a catted pipe, because i wanted to keep my exhaust system street legal. When i received the x-pipe it states on the cats "off-road only". I was a little disappointed, but it was worth the investment. Still passed inspection though


    Year: 2001 Submodel: GT

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    July 16, 2013

    Great system

    Love this X pipe! Bought this to match it up with my Magnaflow catback and it sounds great! Louder than the stock Midpipe, but not obnoxious. Perfect for a street car/ daily driver American muscle was great too.. shipped the same day i ordered.. got here fast. No complaints!


    Year: 2003 Submodel: Cobra Michigan

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    June 02, 2013

    Magna flow catted x pipe

    Another great product from Magna Flow. This catted x pipe is well put together. It is solid, yet so light weight. With a tune for the high flow cats, it definitely had a seat of the pants feel. The exhaust sound does turn heads. Did not have any check engine light problems! Thanks american muscle for this great product and quick shipping!


    Year: 2003 Submodel: Mach 1 Memphis, TN, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    June 01, 2013

    a real head turner

    so much better than the video! Am super pleased with this product!!!


    Year: 2004 Submodel: GT waterford,Mich

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    July 17, 2012

    Sounds Great!!!

    I can't comment on the performance gain because It was installed the same time my Procharger was being installed but the Sound with Borla Stingers and the Magnaflow X-pipe are Great!!


    Year: 2003 Submodel: Mach 1 Roanoke Rapids, NC, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    June 26, 2012


    I ordered this X-pipe based on the other reviews that I read and all I can say is that I'm glad I went with this Magnaflow. The sound is great and it really does turn heads. Im not an expert with cars so I took it to the shop and got it put on for about $100. Don't let the price of it turn you away. I can promise it's money well spent! I will never order another mustang product from any other company. American Muscle ALL THE WAY! Fast shipping and excellent customer service! Definitely a satisfied customer!


    Year: 2001 Submodel: Bullitt Atlanta, GA, USA

    Helpful (1) (0)

  • 5/5

    February 19, 2010

    awesome product

    awesome sound havent had a chance to test it out just got a snow storm installed in about 3 hours you will need a new gasket on passenger side.


    Helpful (4) (3)

  • 5/5

    Installation Time: Afternoon

    June 13, 2013

    Magnaflow Catted X and SLP LM 1

    I've had this particular combo for about 8 years now on my 2002 GT vert. Well, after all this years it finally gave up the ghost when the driver's side cat started rattling. I'm quite sure it would have lasted much longer but a lowered car, speed bumps and one or two road gators took it's toll. I toyed with the idea of going with another catted x-pipe but decided to stick with what I was absolutely satisfied with. It carries a premium price but you get every bit of what you pay for. Solid one-piece construction, mandrel-bent stainless steel with OEM fit and the sound is pure road music. Would I do it a third time? You betcha!.


    Year: 2002 Submodel: GT Ft Wash MD

    Helpful (1) (1)

  • 5/5

    February 09, 2011

    Unleash the Beast

    Paired together with Magnaflow 'wide-open' catback, this midpipe sounds deep without highway drone. Went from a MAC o/r H-pipe (emissions and smells). Quick install and fast shipping!

    CK - Jessup

    Helpful (1) (1)

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