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Pypes Street-Pro Dual Cat-Back Exhaust (98-04 V6)

Market Price $517.99 You Save 12% ($61.00)
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  • Item 20025
  • MPN# SFM54

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    Features & Details

    • Aggressive V8 Look and Sound
    • Increases of 8 to 13 Horse Power
    • Bolts Up to the Stock Factory Y Pipe
    • 2.5" 409 Stainless Steel Tubing
    • 3" Polished 304 Stainless Steel Tips
    • Fits 1998-2004 V6 Mustangs
    V8 Style And Sound. Bolting on a Pypes Street-Pro Cat-Back System to a stock 1998 to 2004 V6 will yield an instant 8 to 13 horsepower gain! It features two Street-Pro mufflers for Pypes ultimate in flow (and power gains) with an aggressive V8 sound.

    No Cutting or Welding Required. Unlike so many other aftermarket V6 dual exhaust kits that require cutting and welding the stock Mid Pipe, the Pypes Street-Pro Cat-Back system simply bolts right up to the stock Y-pipe for a no hassle installation.

    Quality Materials. This Pypes Dual Cat-Back Exhaust is constructed from free flowing mandrel bent 2.5" 409 stainless steel piping and features Pypes Street-Pro 3-chamber mufflers for an aggressive throaty sound. The whole system is finished off with a set of 3" Polished 304 stainless steel tips for classic Muscle Car styling.

    Application. The Pypes Street-Pro Dual Cat-Back Exhaust kit is specifically designed to simply bolt-on to existing stock Y-pipe on of any 1998 to 2004 3.8L or 3.9L V6 Mustang for more power and a more aggressive sound.

    Fitment: 1998 1999 2000 2001 2002 2003 2004 Details

    What's in the Box
    Hardware included:
    • (4) 2.5" U clamps
    • (2) Muffler hangers
    • (2) Tailpipe hangers
    • Hardware kit (fastners, etc.)
    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

    Most Helpful Reviews

    Love It!!!!

    I love this exhaust, it makes my v6 run a lot better, sound amazing, and even save gas. Thanks american muscle i love this product and i recommend it to anyone who is wanting to get great sound out of ...

    Read More
    Helpful (32)

    A Must!

    This system looks and sounds great! I had a single exhaust on a 96 V6 3.8L, that I converted to this cat back dual system! ANYBODY can do this with the instructions given on the website! I have next ...

    Read More
    Helpful (27)

    Overall Rating 4.4 out of 5 stars
    Read All 44 Reviews

    Customer Photos (20) Submit Your Photo

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    5 Questions / 5 Answers

    Ask a Question

    Is there any possibility that this exhaust could bolt on to a 97' mustang v6? If so, how?


    • This exhaust will not fit perfectly for a 1997 v6 Mustang. You will need custom modifications to be done to this to get it to fit. For the type of modifications, please contact a trusted exhaust shop to see what can be done.


    Helpful (0)

    I'm looking to buy this but swap out the street pro mufflers with the slp loudmouth 2. The street pro mufflers are 14 inches long and the slp mufflers are 18 and 3/16. I'm wondering if it would fit over the axles and how far the tips would go out. Is the slp an option here?


    • What you are looking to do here is going to be a custom setup. This will require some cutting and welding to be a perfect fit. You will most likely have to cut some pipe out of this system to fit the longer mufflers in there and also do some adjusting to the exhaust hangers as well. rather than going through this fabrication I would recommend looking into a system that is going to have a similar sound like the Magnaflow Dual Cat-Back Exhaust Item #48015 ( This system has a similar style muffler setup as the SLP mufflers and for the price difference and not needing any modification may be a better route to go.


    Helpful (0)

    Would this work on a '97 if I were to purchase a GT bumper with the cutout for the exhaust pipes?


    • Not without modifications. The Pypes Street-Pro Dual Cat-Back Exhaust (98-04 V6) is specifically designed for 98-04. I would suggest looking for something that is advertised for a 97 to guarantee fitment.


    Helpful (0)

    If i buy this kit will i need anything else or is this everything needed for a dual exhaust conversion?


    • The Pypes Street-Pro Dual Cat-Back Exhaust (98-04 V6) kit comes with everything you will need for a Dual Exhaust Conversion. This kit will simply bolt-on to the existing stock Y-Pipe.


    Helpful (0)

    Could i put a X pipe on this and make it a full duel? The X pipes on AM say they are for catted gt exhausts but i was wondering if they would still work for this? Any extra details are appreciated.


    • Unfortunately, this kit is designed to be used with your factory Y-pipe. You would just need the Pypes V6 True Dual Exhaust Kit rather than this kit. It has the same Street-Pro 3-chamber Mufflers as this kit and comes with the catted x-pipe to make it a true dual system. Check out the link below!


    Helpful (0)

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    Customer Reviews (44) Write a Review

    Overall Rating 4.4

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Loudness / Volume 3.181818 3.2
    • Exhaust Note 3.454545 3.5
    • Fit & Finish 3.454545 3.5
    • Bang For Your Buck 3.909091 3.9

    • 5/5

      April 22, 2010

      Love It!!!!

      I love this exhaust, it makes my v6 run a lot better, sound amazing, and even save gas. Thanks american muscle i love this product and i recommend it to anyone who is wanting to get great sound out of there v6!!!


      Helpful (32)

    • 5/5

      May 03, 2008

      A Must!

      This system looks and sounds great! I had a single exhaust on a 96 V6 3.8L, that I converted to this cat back dual system! ANYBODY can do this with the instructions given on the website! I have next to no experience with cars in general, and this is the first modification I have ever done. I am very impressed! A must buy if you are even considering it!


      Helpful (27)

    • 5/5

      March 22, 2008

      Sweet for the price

      It may not be as high priced as some of the other ones, but overall, its a great exhaust. This kit comes with brackets you can us to fit a GT bumper or a V6 bumper. I kept the V6 bumper and cut hole in it, which came out great!!!


      Helpful (20)

    • 3/5

      July 28, 2010

      pypes 409 stainless steel street-pro catback w/ polished

      May have to be ordered if not in stock so may take 1-2 weeks. Does Not Sound like a v8 at all and the y pipe that comes with the kit does not fit right! they forgot to bend it so it does not touch or rub your transmission, resulting in one mufflers being lower than the other. because of this it scrapes the floor a lot on big bumb's depending on your speed! and since you have to angle the mufflers so the y pipe doesn't rub against the transmission the muffler tips are not where there supposed to be. i will have to take it to a mechanic so he can bend my y pipe so i can tuck everything in so both of the mufflers are in the correct position unless you make it a strait pipe which would get rid of this problem. everything is bolt on so u can do it yourself. do not pay your mechanic to do it unless you want him to weld it for you but really there is no need for you to weld.. however it does save more gas and sounds a little better depending if you have an automatic mustang or a stick shift (no v8)


      Helpful (13)

    • 3/5

      July 16, 2010


      I ordered this system and tried to install it finding out that the company sent me a warped deffective kit. I did get a replacement after having to take pictures and get a quote from a shop. When you get the system for yourself you will see how the mufflers are cheap as the single stock exhaust you get. So basically you're buying two stock pipes Goodluck

      Evan S.

      Helpful (12)

    • 5/5

      July 07, 2009


      It was easy to get the old one out, but I had a hard time getting the new one in. I had to weld it in order for it to stay in place, and my father helped me to put some holes in my V6 spoiler, they came out great. Now the car looks and sounds awesome. I also installed some BBK headers and a K&N Air Intake at the same time so they made a great differene. Thanks American Muscle!

      Luis A.C.

      Helpful (6)

    • 5/5

      January 05, 2011

      fat pypes

      took it to my shop, after a few cuts and some adjusting it all came together nicely, the car looks great and improved the sound


      Helpful (4)

    • 3/5

      November 30, 2010

      This is not average

      After cutting out factory exhaust, (like instruction said) My 02' V6 must be different, because I had to cut 7 1/2" off the new Y piece and was still difficult making all matchup. I've worked on my cars for years, and for prices that you have to pay now-a-days, things should work out a whole lot better! Nothing "throaty" about the sound either, but it does look good. (should after 4 1/2 hours of hard labor)

      Tom Vaughn

      Year: 2002 Submodel: V6

      Helpful (4)

    • 5/5

      July 31, 2010

      Great for the new build!!! Must buy!

      This was the first thing i bought for the 99 v6. It took a few days to actually put it on since i live in the north country of New york, and the Underneath was all rusted so theyre was nonthing to put the hangers too... So i had to do some weilding. But after some cuts and bends the sound was perfect! and the increase was very noticable. too bad i have the chip that turns off at 115... GREAT PRODUCT!!! Thanks AM:D:D


      Year: 1999 Submodel: V6

      Helpful (4)

    • 5/5

      May 08, 2010

      pypes 409 stainless steel street-pro catback w/ polished

      Nice exhaust fast shipping it was hard to put it on but after some modifications that i did it is perfect now sounds good i jst removed the 2 y pies and put a straight tube on each side and it sounds relly good noe nice american muscle


      Helpful (4)

    • 5/5

      April 21, 2010

      Fast Shipping

      Really fast shipping, really liked that there was no extra charges at the door. American muscle is awesome!!


      Helpful (4)

    • 5/5

      October 16, 2008

      Nice, but required cutting

      Great sounding system for the price. It added a nice gurgle that is much better then the stock system. It did take awhile to install, as I had to cut for it to fit on my 01 Mustang.


      Year: 2001

      Helpful (4)

    • 4/5

      May 26, 2008

      Quite Pleased

      Overall, a good product. I love the look and the sound. Install was fairly easy. I am quite pleased with the way this turned out. Thanks Pypes and American Muscle!


      Helpful (4)

    • 3/5

      Installation Time: Full Day

      March 13, 2017

      Pypes conversion kit

      The product seems sturdy and well built so far, but it was a hassle to install. The instructions could be clearer and you better expect to be cutting a lot. The sound overall isn't that impressive, it's a little bit of a let down in my opinion. The one great thing about this product is that it looks nice, really upgrades the appearance of the vehicle.


      Year: 2003 Submodel: V6

      Helpful (3)

    • 4/5

      July 11, 2016

      Better than Stock

      The look is great and for the sound... It is much better than stock but it sounds like a mixture of a Honda Civic and. Roush Mustang. Easy to install and worth the money.


      Year: 1998 Submodel: V6

      Helpful (3)

    • 5/5

      February 03, 2011


      didnt even almost fit my car i had to cut and weld them at the y two time to make them fit. cost almost as much to fix them to make them fit as it did to buy them.

      josh pearl

      Helpful (3)

    • 5/5

      December 29, 2010

      sweet pipes

      Bought this set for my wifes 2004 V6 ..took it to the shop ,after a few cuts here and there it pieced together and turned out nice, she said it sounds great and it look even better


      Year: 2004 Submodel: V6

      Helpful (3)

    • 5/5

      July 13, 2010

      Great look and sound

      It fits good, it was kinda hard to get it in perfect on the left side but I did it and the dual exhaust looks and sounds great. Thank You


      Helpful (3)

    • 5/5

      March 06, 2008


      This is really great for a v6 car gets better mpg and it added a lttle more horsepower.


      Helpful (3)

    • 1/5

      Installation Time: Afternoon

      August 28, 2017

      not very satisfied

      the item is said to be an easy install but what should have been a one hour job turned into a complicated 4 hours. no where close to fitting without being modified. the front split pipe was a good 6 inches too long on both sides and had to be cut. kit was missing a split flang connecter, i assume it is suppose to be salvaged from the original exhaust line. however that is only possible if the part is not welded to the removed section of the original, i feel that such a peice should be included to avoid installation delays. moving forward to the mufflers, driver side installation was a perfect fit after the split pipe had been cut but passenger side there where many problems. first problem, placing the brakets correctly caused the muffler to press against the drive shaft. once that was fixed by bending split pipe slightly, connecting the tail pipe was another issue, not aligning with the muffler without modifying the braket again. overall a good look but slightly dissapointed with the sound, not a job anyone can do and not really worth the major headache for selfinstallation. i got a better sound from a single aftermarket flowmaster exhaust and there is no noticable performance change.


      Year: 2000 Submodel: V6

      Helpful (2)

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