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Pypes True Dual Off-Road Exhaust (98-04 V6)

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  • Item 20026
  • MPN# SFM55

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    Features, Video & Details

    • True Dual Exhaust for a V6
    • Includes Off-Road X-Pipe and Cat-Back
    • Increases of 15 to 25 Horsepower
    • 2.5" 409 Stainless Steel Tubing
    • 3" Polished 304 Stainless Steel Tips
    • Fits 1998 to 2004 V6 Mustangs

    Review & Installation Video

    Review & Install Video

    JUSTIN: Hey I'm Justin with and this is our PowerPack Bolt-On Build-Up for all 99-04 V6 Mustangs. Now, before we get started, let's address the elephant in the room. From the factory, these 3.8 L V6s weren't the baddest Mustangs on the block, just in terms of all-out performance. But thanks to the large aftermarket support, and bolt-ons that can really squeeze every ounce of power out of any car, well these V6s can be turned into quite the competent little street-car. So that's exactly what we're going to show you here today. But before we get into it, we're going to grab a quick baseline number first just to see what we're starting with. Then we're going to hand the car over to the crew, to get everything installed. JUSTIN: Hey Mike, what's up man? MIKE: Oh, nothing much, man, what's going on? JUSTIN: It looks like we tackled some of the basics under here, I see that SR Performance Cold Air Intake, now obviously that's going to get us a little power of course, but maybe explain to us, maybe what else we can expect from using stuff like that? MIKE: Well first is price, it's a very budget-friendly piece. It's easy to install, looks great, it's no-tune required, and we should see some increase in miles-per-gallon too. JUSTIN: All right, cool, man. Now I notice a little yellow under the hood here as well, that's usually the calling card of Accel products. Tell us a bit more about this Super Coil Pack here. MIKE: You're going to get some horsepower & torque as well on this, but the main thing it's going to smooth out our idle, give us better drive-ability and give us a cleaner, hotter spark. JUSTIN: That's probably pretty important with an older car, such as this. MIKE: Absolutely. JUSTIN: Right on, man. Now I also know we've got the Pipes True Dual system on the car, that's been on for a little while, we're not going to lie, being car guys, this car didn't have much of a chance coming in here with a single exhaust. MIKE: Oh yeah. JUSTIN: So, talk about the benefits of a True Dual system on our V6. MIKE: It's going to increase horsepower and torque, more importantly for most of the guys, it's going to increase the sound, it's an aggressive sound, it's high-quality and it's also easy to install. JUSTIN: Now what's a Mustang without dual-exhaust coming out the back too, right? MIKE: Exactly. JUSTIN: Now, finally, I guess we can be safe to assume you're going to toss one of your custom Bama tunes into the mix? MIKE: Oh yeah. JUSTIN: Awesome man, now what's that going to do for us? MIKE: going to wrap all of our mods together, and make it a complete package. The fuel, the spark, the cooling fans, and being that it's an automatic, we're going to adjust the shift firmness, and the shift links. JUSTIN: Alright man, I guess there's only one more thing to do. You ready to see how much power this little 3.8's going to make? MIKE: Let's do it. JUSTIN: Alright. JUSTIN: So our baseline run with our 2006 V6 gave us 149 horsepower & 185 ft/lbs of torque. With our power pack installed we put down 163 horsepower & 192 ft/lbs of torque, giving us a peak horsepower gain of 14 over our baseline numbers, and gains of 15 horsepower and 15 ft/lbs of torque throughout the curve. Now it's obvious Mike was able to work his magic with the bolt-ons and the tune, but we wanted to give our V6 a little more giddy-up. So we installed a set of Ford Racing 373 gears along with Auburn's limited slip differential, now of course the gears are going to give us that increased acceleration we're looking for, but the diff's going to be equally as important. The limited-slip differential's going to distribute power to both wheels evenly, help us get off the line, and pull us out of the turns but, most importantly, no more embarrassing one-wheel peels. Alright, with everything wrapped up, let's get our V6 off the dyno and on to the streets so we can see how it does with all that new power, along with those acceleration goodies. JUSTIN: So we're back out in our 2000 V6, after the PowerPack's been installed, and we'll just get one thing out of the way, right away. Is our V6 faster than the GT500? Absolutely not, but that's not a big surprise. What I will tell you though, is that our V6 is significantly quicker all around. The acceleration pulls from, pretty much idle, all the way to redline now, as opposed to before, when it kind of fell on its face around 4000 rpms, 'cause it was just kind of being choked out by the single exhaust, and the puny intake. Now the intake is letting it breathe, the dual exhaust is really flowing well, sounds great by the way, for a V6, and the Bama tune's just really pulling it all together. Our acceleration, by the way, is killer. That Auburn LSD along with our 373s, have really made for one peppy daily driver. In the end, V6, much more improved driving experience. That's what we were going for with this Power Pack, and we really did a good job with our little 3.8 L here. So that wraps up our Power Pack for our V6 Mustang. Be sure to check out some of our other 99-04 V6 Bolt-On Build-ups, where we dress up our V6 a little bit, and work on our handling.

    Increase In Performance. Bolting on a Pypes V6 True Dual Exhaust Kit to a stock 1998 to 2004 V6 will yield an increase of 15 to 25 more horsepower! This Pypes V6 True Dual Exhaust Kit includes both the off-road X-Pipe and Cat-Back needed to give your Mustang an impressive throaty V8 sound and increase in rear wheel horsepower.

    Track-ready X-Pipe design. Pypes designed this system with an off road x-pipe to eliminate the power hogging catalytic converter from the horsepower and torque equation. For street use, consider installing the Pypes V6 True Dual Exhaust Catted Kit.

    Quality Materials. Both the off-road X-Pipe and Cat-Back are constructed from mandrel bent 2.5" 409 Stainless Steel. The X-Pipe features welded reinforcement plates for additional strength and the Dual Cat-Back features Pypes Street-Pro 3-chamber mufflers for an aggressive throaty sound. With its 3" polished 304 Stainless Steel tips, this system not only sounds great, but it looks great too.

    Application. The Pypes V6 True Dual Exhaust Kit is specifically designed to fit on any 1998 to 2004 3.8L or 3.9L V6 Mustang for more power and a more aggressive sound. Intended for off-road use. Does not include catalytic converters.

    Technical Note: May require the use of O2 Sensor Extensions for proper installation. Some cutting to the flow tubes is required.

    Fitment: 1998 1999 2000 2001 2002 2003 2004 Details

    What's in the Box
    Hardware included:
    • (1) X-pipe
    • (2) Street-Pro Mufflers
    • (2) Tailpipes
    • (2) Flow Tubes
    • (2) Flow Tube Flanges
    • (4) Clamps
    • (1) Bolt Kit
    • (1) Hanger Kit
    • (2) 3" Stainless Tips
    • (2) Tip Hangers
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: 409 Stainless Steel Tip Material : Polished 304 Stainless Steel
    Piping Size: 2.5" Tip Size: 3"
    Muffler Type: Chambered Fitment: 1998-2004 V6 Mustangs
    Will it fit my Mustang?
    • V6 - 98, 99, 00, 01, 02, 03, 04

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    15 Questions / 8 Answers

    Ask a Question

    will dual v8 work on my v6 whats the difference in a v6 dual and v8 dual my 04 3.9 v6 has headers will that help me put v8 duals on it and how will it sound


    • You could install this Pypes True Dual Exhaust and bolt it directly to your shorty headers (or stock manifolds). If you wanted to use a GT catback rather than this kit, you would need to purchase the adapter mid-pipe and then you could pick the GT catback of your choice. I've attached the adapter link below so you can take a look. Give our Experts a call if you have any other questions or would like any advice on which route to choose!


    Show 1 more answer Helpful (8)

    Cheese Burger or Rice Patty!? How would you best describe the sound from this exhaust? I live in Alaska where we don't have emissions laws so these are street legal. I'd like to get it but I want to know, Does this exhaust system in any way sound hallow or... "Rice'y" "tunnel'y" tin-can'y" I want to most effective exhaust for my V6 Mustang that stands out, is aggressive and not embarrassing to use as I probably wont replace it again for awhile since its about $1,000.00 to get it to Alaska. PLEASE HELP!..... THANK YOU, Kraig


    • Kraig, Me again. I read some of the reviews. From what hear that it sounds kinda ricey and that it doesn't quite fit. My suggestion would be to go with the Magnaflow Comp series. Their Straight through design NOT the rectangular muffler kind. Idk why, but the straight through sounds better. I have done so much research on exhaust because I am so particular on how I wanted my car to sound. So, Basanni is like a magnaflow but more like a 350z tone, flow master is G-- awful. I had it on mine and had to take it off. Corsa, I couldn't really find too much on it and AM doesn't sell it. Ford racing, heard it in person, sounds ricey. Magnaflow is above all. and im not saying that because I have it...well i am but its an un bias opinion. Ive heard alot of exhaust and magnaflow stuck out to me as the best sounding exhasut. (the straight through design that is). So mags with an off road X pipe would be the way to go. If your car cant fit a muffler after the axle. you can always cut the tips off, mid mount the muffler, and clamp/weld the tips back on after the axle. I say this because it sounds like there would be as much labor time getting everything on the pypes set up to fit as it would the one I recommend. Plus, you can find everything here on American Muscle. Hope this helps.


    Show 1 more answer Helpful (2)

    would this x-pipe hook up to the pacesetter long tube headers? i was wondering this as i want to get longtube headers along with an exhaust kit all at once istead of having to install part by part or waiting really?thanx


    • This true dual has a standard length mid-pipe and unfortunately, won't install properly in combination with Long Tube Headers. This exhaust kit is meant for shorty headers or stock manifolds. The long tube headers require a shorty length mid-pipe to compensate for the longer length header. Hope this helps!


    Helpful (1)

    Do I need 02 extension with this exhaust system for my 2002 v6?


    • The Pypes True Dual Off-Road Exhaust will not require O2 extensions with the installation of this kit.


    Helpful (0)

    What makes this exhaust system able to fail emission tests? Like is there any parts that would be missing to it that should be there?


    • This Pypes True Dual Off-Road Exhaust includes a catless mid-pipe - not having the catalytic converters will cause the vehicle to pass emissions.


    Helpful (0)

    Is this street legal?


    • hey Chase, since it is stated as an off-road exhaust it will unfortunately not be street legal and may cause your vehicle to fail emissions testing


    Helpful (0)

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    Customer Reviews (34) Write a Review

    Overall Rating 4.3

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$250-$500

    • Loudness / Volume 4.833333 4.8
    • Exhaust Note 4.333333 4.3
    • Fit & Finish 4.333333 4.3
    • Bang For Your Buck 4.833333 4.8

    • 2/5

      May 06, 2010


      Dont get me wrong its a great sounding exhaust but pypes is the worst company my company has ever come acrossed and show no quailty in the products. We installed one on a 2001 v6 and the flanges on the H-pipe was the wrong size and way off from stock flanges, they could not seal on the manifold even with the inserts they gave you. The left tail pipe was 20 degrees off of the right side and I have hurd of these problems from other pypes customers.Over all very cheaply made system and i will never never purchase a pypes product for myself or anyone I know.


      Year: 2001 Submodel: V6

      Helpful (39)

    • 4/5

      January 09, 2009

      Catless V6 Pypes

      Sounds great at idle especially when cold. Kinda loud from idle to 3 grand. Then like 3.2 it gets this kind of ricey sound except its louder than all hell and starts pulling harder. It has alot more mid end power 3-4 will be your newfound power band compared to 2-3 so basically 2-4 is where you will feel all the power. MPG also improved Would have gotten 5 stars except it doesnt have the type of flowmaster tone We all love and look for


      Helpful (15)

    • 1/5

      June 05, 2010

      dont do it

      If your thinking about buying this exhaust... dont. nothing fits not even the tips. I had to add shims to the tips to get them to tighten down to the tail pipes. I had to bend the down pipes to get them to fit to the exhaust manifolds and even then with the inserts they give you they will not tighten up snug to the exhaust manifolds. Then once you finally think your done the left tip is off by a noticeable amount. So what are you actually getting? 600$ worth of parts that do not fit right and that do not even look good once your finished because of an awkward angle to one of the tail pipes. do your self a favor and keep your stock exhaust or go to a muffler shop.

      Justin Blackmon

      Helpful (13)

    • 5/5

      December 15, 2008

      Great exhaust

      I love the exhaust. My Dad and I put it on in 6 hours. We moved like snails, but I love the sound of the exhaust, its great! I can feel a little more horses. Feels great & sounds great, so... great exhaust! I recommend this exhaust.


      Helpful (13)

    • 5/5

      April 29, 2011

      loud as hell

      first off these pypes are loud as hell lol but love speeding pass people turning heads.good sounding pipes for a v6 not a big fan of the street pro mufflers, they Will b changed. tips dont tightn on the tail pipes good there loose make a rattling sound when you hit a bump. but if you want a v8 look for your v6 get this product


      Year: 1998 Submodel: V6

      Helpful (9)

    • 5/5

      October 14, 2008

      Pypes V6 Exhaust

      This exhaust really has a great sound. It is a bolt up exhaust, though we had to remove the rear wheels to get some of the pipes over the rear axle. Also, it requires cutting to remove the stock exhaust. Once installed, it sounds great. We took the rear O2 sensors and used them to plug the rear holes and just left them unconnected from the engine. That solves the weird sound, but you need a chip or an over ride for the CEL to go off.


      Helpful (6)

    • 4/5

      July 03, 2008


      Overall, this is a good system. You need to buy two extra O2 sensors to plug up the holes in the down pipe or it will make your engine sound strange. After you work out the kinks and break in the pipes, it is a system worth buying.


      Helpful (6)

    • 4/5

      Installation Time: Full Day

      February 05, 2014

      Worth It

      Had no problem installing these on my 98 mustang. Everything fit right and it sounds really good. Gives is that old muscle car sound and smell.


      Year: 1998 Submodel: V6

      Helpful (4)

    • 5/5

      Installation Time: Full Day

      October 31, 2011

      Unbelievable Performance

      I bought this exhaust last month and had it installed...this catback exhaust is the bomb truly what it stands for A BEAST!! Sounds excellent when driving normally but when u step on the gas u definitely get the response and sound your looking for. With the off road x-pipes it is mad loud....u can hear my Stang coming from a distance....this exhaust is a must have u can't go wrong with this exhaust performance beneath your can feel the rumble beneath you and everyone stops and stares at you!! All I can say is get this combo and you won't be sorry...


      Year: 1998 Submodel: GT Tortola, British Virgin Islands (Caribbean)

      Helpful (4)

    • 3/5

      February 09, 2011


      Overall its a decent exhaust. some of the piping wouldnt fit properly so i had to bend and use my own to make things fit. fairly easy install due to the lift im convenienced with. Althought the factory studs on the manifolds have to be swapped out. As far as the sound goes, id recommend different mufflers. The ones with the package give it a pissed off bumblebee noise after about 1500 rpm. I used the set up with a pair of flowmaster 40's and it sounds great for a 6. just be prepared for some difficulting in making sure things seal up and make absolutely sure you use the sleeves supplied for the down pipe off the headers. otherwise itll sound nasty.

      blake dudley

      Helpful (4)

    • 3/5

      May 16, 2010


      exhaust is loud but if you own a 99 you will have to get diffrent flange gaskets in order to fit to manifolds, also my exhaust was not bent the right way so I had to rebend the mid pipes, great system for the price, little bit of innovation and work you can get a MEAN SOUND for a pretty good price also if your car is lowered more than 1.5" this exhaust is not flush with the bottom it sags a little so prepare to scrape a little if anyone has any questions feel free to email


      Year: 1999

      Helpful (4)

    • 5/5

      December 21, 2009

      Great Exhaust

      This exhaust was a great investment. The install was fairly easy, and the sound is great. I definitely recommend this kit to anyone looking for a great sound out of their 3.8.


      Helpful (4)

    • 5/5

      July 05, 2009


      wow!!!!! i just bought this exhaust, and it got here in 3 days. it was pretty easy too instal, i did it by myself in 5 hours. the sound is so much deeper and it pulls so hard. i definatly reccommend this system. I LOVE IT. thanks american muscle

      darren manning

      Helpful (4)

    • 4/5

      May 01, 2008

      Pypes catless dual conversion kit

      Very nice header back exhaust kit for the 3.8l Mustang community!


      Helpful (4)

    • 3/5

      April 11, 2008

      Dual Pipe Kit

      In Texas you have to have the CATS so we modified them for legal use. At low to mid RPM range they soung great. Great pipes thanks AM!!!


      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      March 22, 2013

      I love this exhaust system

      I love the tone is has giving my mustang and the proformance is great it only took me a afternoon to put it on and it fits great


      Year: 2003 Submodel: V6 Keithville, LA, USA

      Helpful (3)

    • 4/5

      October 28, 2010


      Love the exhaust it sounds great when idling and up to about 3k once over that it gets this weird almost unique ricer SCREAM that def turns heads. added alot of power to my car especially with the SCT tuner on it, def a good combo i would advise both for any mustang owner


      Helpful (3)

    • 3/5

      March 04, 2010

      pretty cool

      great product... had a trouble with it bolting on to my 1999 manifolds...had to take it to an expert...minium cutting..quick installion...if u know what ur doin..over all sounds awsome at idle... an loud on the road..dont really know bout the price..


      Year: 1999

      Helpful (3)

    • 5/5

      July 19, 2009

      pypes dual exhaust

      great exhaust!! puttin it on was a pain but well worth it! my car is 10 times louder than it was before! it screams down the road! and u can def. feel a difference!

      austin simpkins

      Helpful (3)

    • 5/5

      June 04, 2011

      Overall good

      What I liked about this product is the powergain automatically feel the extra hp. Very loud at 3000 rpms. Undecided what I'm going to do with them I might make mine turn downs after the mufflers- which brings me to my dislike about the product, the exhaust are great don't get me wrong just that they were cheaply made what I mean is for example when u look at the exhaust tips the drain holes are off way off, it was lime the manufacturer substandard the work one pipe come up more than the other. But overall good exhaust system. I might unbolt the rear pipes that go over the rear wheels and put turn down after the mufflers...

      Michael kreamer

      Year: 2000 Submodel: V6

      Helpful (2)

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