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Pypes Catted X-Pipe (98-04 V6)

Market Price $442.95 You Save 12% ($50.96)
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  • Item 20040
  • MPN# XFM39

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Features & Details

  • Needed for a True Dual Exhaust Conversion
  • Balance Out Exhaust Gases for More Power
  • Pypes Modular Construction
  • Catalytic Converters Included
  • 2.5" 409 Stainless Steel Tubing
  • Fits 1998-2004 V6's with a GT Cat-Back
Upgrade To A True Dual Exhaust. Now you can easily upgrade your V6 Pony to a true dual exhaust with a Pypes Catted X-Pipe. Just install this Pypes X-pipe along with the 1999-2004 GT catback of your choice, to give your Mustang the impressive looks and sound of a GT.

Balances Exhaust Gases. This Pypes catted x-pipe balances out the gas pressures in your exhaust system to create more power and torque than a traditional H-pipe. Why? Because the exiting exhaust pulses are merged at the "X", resulting in less exhaust back pressure for more power.

Modular Construction. Pypes unique three piece modular construction makes it quick and easy to add or remove a catalytic converter to your exhaust system in just minutes depending on your driving needs.

Durable Stainless Steel Construction. Pypes uses sturdy 16 gauge 409 stainless steel mandrel bent 2.5" tubing for improved flow and features welded reinforcement plates for additional strength. The included Catalytic Converters are build from polished 409 stainless and feature a durable Ceramic substrate material making them perfect for naturally aspirated applications.

Application. This Pypes Catted X-Pipe is designed for use on a 1998-2004 V6 Mustangs in combination with an aftermarket or factory dual 1999-2004 GT catback exhaust system.

Technical note: Must be used with a stock or aftermarket GT catback exhaust system!

Fitment: 1998 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) X-Pipe
  • (4) 2.5" band clamps
  • All required fastners (nuts, bolts, washers)
  • Flange gasket
Installation Info
Tech Specs
Mid Pipe Specifications
Style Mid Pipe: Standard length "X" Type Headers Required: Shorty
Piping Material: 409 Stainless Steel Piping Size: 2.5"
Catalytic Converter: "Yes" Fitment: 1998-2004 V6 Mustangs
Will it fit my Mustang?
  • V6 - 98, 99, 00, 01, 02, 03, 04

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Most Helpful Reviews

Pypes Catted X pipe (2000 mutang V6)

This product was a great addition to my V6. It sounds great and I believe it will sound even better ounce I install flowmaster mufflers. Aside from the sound, it gave me greater acceleration than the y ...

Read More
Helpful (1)

Great product

I completely love it, it makes my car sound totally different, it gives it that american muscle satisfaction!

Helpful (1)

Overall Rating 4.5 out of 5 stars
Read All 17 Reviews

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13 Questions / 8 Answers

Ask a Question

if i add pypes catted x-pipes can i install flowmaster thunder catback with it


Helpful (1)
  • Definitely! This Catted X-pipe combined with the 99-04 GT Flowmaster American Thunder Catback would work great together. As a side note, this mid-pipe will allow you to install any 99-04 GT catback of your choice. Hope this helps!


Show 3 more answers

I have a 98' V6 and I really want to get that raspy aggressive sound and was wondering, would the Pypes X-pipe and SLP Loudmouth sound good on a V6 or what kind of set up would work best, and do I need mid-pipes if so where can I find them?


Helpful (0)
  • The Pypes Catted X-Pipe and SLP loudmouth would give you a very raspy exhaust note. There would be no need for anything other than the SLP loudmouth catback and Pypes X pipe to complete this setup

    Rob D

Are these California legal since they come with the catts?


Helpful (0)
  • Unfortunately this is not legal in California.


Are these short enough to be used as side exhaust? I want to have a dual exhaust and I realized how much cheaper it is not to by a cat back and just have them directed out the sides. I'm planning on putting the M-80 bullet mufflers on them and having them directed out the sides in front of the rear wheels. Would this be too long? And if so can I just cut it?


Helpful (0)

will it fit a 96 3.8 v6. 96 and 98 3.8's should be the same body, The Y pipe for a 98 is the same part number as the 96 for the factory fit.


Helpful (0)
  • The Pypes Catted X-Pipe (98-04 V6) will be able to fit a 1996 V6. As you mentioned, the Y-Pipe is the same size for the 1996s and the 1998s.


Will the MAC ceramic long tube headers fit on this X pipe?


Helpful (0)
  • The MAC Ceramic Long Tube Headers (94-97 V6; 01-04 V6) item #40062 ( will fit up to the Pypes Catted X-Pipe (98-04 V6) as the piping is the same 2.5".


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Customer Reviews (17) Write a Review

Overall Rating 4.5

out of 5 stars

Installation Time:Full Day

Installation Cost:0-$100

  • Loudness / Volume 4.625 4.6
  • Exhaust Note 4.875 4.9
  • Fit & Finish 4.25 4.3
  • Bang For Your Buck 4.625 4.6

  • 4/5

    July 14, 2016

    Good quality

    I put these on my 2000 v6 Mustang. I did it up on ramps, actually a pretty easy job with the right tools. Only hard part is my manifold bolts stripped so I had to buy a reverse spiral socket for stripped bolts and it worked like a charm. I paired this up with the sr performance catback exhaust. It is now really quiet. It looks amzing though. If you're thinking about buying it then go ahead. Highly recommended.


    Year: 2000 Submodel: V6

    Helpful (1)

  • 5/5

    July 11, 2016

    Great product

    I completely love it, it makes my car sound totally different, it gives it that american muscle satisfaction!


    Year: 1999 Submodel: V6

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    December 20, 2014


    I had a local shop install. I already had a flowmaster 40 series dual cat back exhaust, but only had a y pipe. By adding the x-pipe it increased the flow and now it has a nice growl to it. It sounds awesome but by no means does it sound like a V8 but I'm happy with the great improvement in sound and horsepower increase.


    Year: 2001 Submodel: V6 Galveston County, TX, USA

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    November 15, 2013

    Great sound

    I was pleased with the Pypes X pipe, however, the install was tedious and more time consuming than I thought it would be because I had to cut the driver side down pipe so the mid pipe would fit onto the cats. Once I finally got the welds finished it sounded even better than my catted straight pipes though (made my 3.8 louder than a V6 should be).


    Year: 2003 Submodel: V6 Virginia

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    January 06, 2013

    Pipes catted x-pipe

    This was worth the money the second I put the gt catback exhaust system on. Trust me you will be asked if your stang is a v8 a lot


    Year: 1999 Submodel: V6

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    November 20, 2012

    Pypes Catted X pipe (2000 mutang V6)

    This product was a great addition to my V6. It sounds great and I believe it will sound even better ounce I install flowmaster mufflers. Aside from the sound, it gave me greater acceleration than the y pipe which it replaced and, it did not need oxygen sensor extentions when installed everything fit like a glove! I would and have recommended this product, as well as, other products I have purchased from Americam Muscle!


    Year: 2000 Submodel: V6 Atlanta, GA, USA

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    January 27, 2012

    true dual pypes exhaust

    I've been wanting to add a custom exhaust system to my v6 mustang for a long time now. I probably spent over half a year reviewing my different options, but when it came down to it the pypes dual catback exhaust along with the catted x-pipe converstion system for v6s was the best solution. The sound is loud and crisp, about as close to a v8 as I could get and that was exactly what I was looking for. I highly recommend it!


    Year: 2003 Submodel: V6 Chesterfield, VA

    Helpful (1)

  • 4/5

    February 22, 2010

    Great Sound; Tough Installation

    First off, GREAT SOUND ON A V6!!! I installed this pipe (with cats) this past weekend along with BBK chrome shorty headers and a Flowmaster American Thunder Catback with Super 40 Series mufflers. I never thought my 6 banger could sound this great. The shipping was fast, and I got everything AM promised me. Unfortunately, I had problems installing the x-pipe, and this is the only reason I am giving it 4 stars instead of 5. It took two other guys and myself about an hour or so to get the pipe to line up and slide the cats and pipes together and get the clamps on. Either take your car to an exhaust shop for the installation, or be ready to wrestle with it for a while. Also, after you get all the pieces together MAKE SURE you put a floor jack under the x-pipe and lift it up before you tighten up all of the bolts, or you'll have some SERIOUS clearance issues (I didn't do this at first, and I only had about two inches of clearance). After all is said and done, I am more than happy with the sound and performance coming outta my car. My dad and uncle could not believe it when I showed them my car. We put it next to my dad's 96 impala SS (has an LT1 V8 and flowmaster exhaust) and my v6 is louder! Thanks AM.


    Helpful (11)

  • 1/5

    February 22, 2011

    BUYERS BEWARE!!!!!!!!

    To start American Muscle is awsome and there customer service is great. Pypes on the other hand is very bad. I had bought the catted X-pipe back in march 2009 with an SLP setup. The mechanic I payed to put it on had a tough time getting the X-pipe to fit and he barely got it on. In April of 2010 my check engine light came on and was told that I needed to replace an oxygen sensor. It is know February 2011 and I replaced my oxygen sensor, but my check engine light is still on and the real reason its on is that one of my catalytic converters is bad. With the catalytic converters being under warranty still (5 year warranty), I called Pypes. I told them the problem and they said they would replace it all I had to do is Email them my order invoice and phone number and they would mail me a new one for $15.00 shipping cost. That was 3 weeks ago and I sent them 20 Emails and have tried to call them about it and the person on the other line keeps giving me the run around. I did finally get a hold of someone yesterday and they argued with me that I had to send them the defaulted part before I get a new one. But my main concern was that he told me, "The ceramics inside the catalytic converter's ware down after a few years and its normal." I of coarse would never had bought them if I'd known that and know I'm just trying to warn people about there horrible buisness. I am not going to put some crap on my car and am ordering SLP cats instead. Pypes is a terrible company so buyers beware.


    Helpful (9)

  • 5/5

    December 29, 2010

    Sounds Sick


    2000 V6 Rafa

    Helpful (4)

  • 4/5

    October 14, 2009

    Installation Issues

    This is my experience when installing it on a 200 Mustang GT Convertible with stock manifolds. The product itself is well constructed and fairly easy to install. There are a couple of issues worth mentioning though. First off even if you install the included downsized flange on the driver side when installing this kit. On a stock exhaust you will experience leaks! I tightened it with a two foot breaker bar until my insides were about to pop and still had a leak. The problem was resolved by my going to a local muffler shop where they found that the factory studs have a fixed spacer preventing the pipes from fullly sealing correctly. They had to remove the factory studs and put in standard studs. Which incidentally cost me $100.00. Finally my car stopped sounding like it was ready for nascar. The second problem is with the placement of the gasket on the passenger side. Initially everything was fine, but after two weeks of driving and some of it was quite spirited. The passenger side started leaking making my car sound like I'm ready for nascar again. What I did to resolve the problem was double up on the gaskets on the passenger side and tighten it with the same two foot breaker bar. So far so good but we'll see how long it stays quiet. Don't get me wrong I do enjoy the nice sound of a performance exhaust, but not when it sounds like open headers and the cops keep pulling me over for violating the local sound ordinance.


    Helpful (4)

  • 5/5

    Installation Time: Shop Install

    October 03, 2011

    Great X-pipe

    All i can say is wow what a great product i got this last week and just got it installed today and it does make a really big difference in tone of my v6 mustang also with the flowmasters sounds close to a gt i would highly recommend this product.


    Year: 2003 Submodel: V6 north carolina

    Helpful (3)

  • 5/5

    July 24, 2009

    Sounds Like a GT

    This sounds almost like a GT nothing will ever make a 6 sound like an 8 but it is louder at idle than my friends GT with Magnaflow exhaust cat back.


    Helpful (3)

  • 5/5

    November 15, 2010

    Awful Fit

    This thing fits horribly. The downpipes are too long, The flanges don't fit snug to the header flange, The X section doesn't line up with anything, and without using a lift to install it you're almost guaranteed sagging. Would strongly recommend finding another solution before using this midpipe.


    Helpful (3)

  • 5/5

    May 01, 2011

    2004 V6 pony

    I would like to thank AM for distributing this package as quikly as possible. Pypes will deffinetly need to roconfigure the manufacturing fittings for this product. The piping the connects to the headers sre too long. maybe they sould shorten them and extend the x-pipe for tighter flush against the under carriage keeping the car from scrapping. I did all the work myself and now I will have to take to garage for all the loose ends.

    Brandon Morris

    Year: 2004 Submodel: V6

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 17, 2016

    great product

    works great I had to cut a little more of then the instructions said to get it to fit in right but you have play in the cat for the down pipe(don't know if it because I have shorty's on it or because I couldn't get my exiting cat back all the way off but it is good fit. great product


    Year: 2002 Submodel: V6

    Helpful (0)

  • 4/5

    Installation Time: Less than 1 Hour

    August 11, 2015

    X pipe

    If you're looking for a slight increase in horsepower, go with this product. Good upgrade for any v6 owner ! Thanks AM !


    Year: 2000 Submodel: V6 Nc

    Helpful (0)

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