Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST
Win A 2018 RTR Spec 3 Mustang Enter Now!

Borla Stinger S-Type Cat-Back Exhaust (99-04 GT, Mach 1)

Market Price $703.99 You Save 11% ($75.00)
Our Price


FREE Shipping
  • Item 29003
  • MPN# 140067

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
In Stock Ships same business day.
Ship to: ASHBURN - 20146
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
Choose options to add to cart
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • Aggressive Exhaust Note
    • Increases Horsepower
    • Bolt-On Installation
    • Durable Stainless Steel Construction
    • S-Type Mufflers Included
    • 4" Polished Tips
    High Flow Exhaust. Borla engineers have designed this cat-back to deliver a significant increase in airflow over the restrictive stock exhaust system for a dramatic increase in power and sound.

    Aggressive Sound. The aggressive sound of the Borla Axle-Back comes from their signature "S-Type" Stinger Mufflers. The Stinger Mufflers are manufactured from aircraft-quality T-304 stainless steel and feature a Straight-through baffled design to produce an aggressive muscle car sound.

    Durable Borla Construction. The S-Type Cat-Back a.k.a "Stinger" system is made from mandrel-bent 2.5" aerospace-grade austenitic stainless steel, and features 4" brightly polished tips for a super-aggressive appearance. This system also features Borla's popular "S-Type" mufflers for an equally aggressive sound.

    Application. Designed to be a direct bolt on, this Borla Stinger S-Type catback will bolt straight up to the factory Mid-Pipe without any extra modifications required on the 1999-2004 GT, 2001 Bullitt, and 2003-2004 Mach 1 Mustang to give your Pony a rich muscle car sound.

    Fitment: 1999 2000 2001 2002 2003 2004 Details

    What's in the Box
    Hardware included:
    • (1) Right muffler assembly
    • (1) Left muffler assembly
    • (1) Right tailpipe assembly
    • (1) Left tailpipe assembly
    • (2) 2-1/2" clamps
    • (2) 2-1/4" clamps
    • (2) Flared front pipe & flange adapters
    Installation Info
    Tech Specs
    Axle-Back Exhaust Specifications
    Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
    Piping Size: 2.5" Tip Size: 4"
    Muffler Type: Straight-through Fitment: 1999-2004 GT / Mach 1 / Bullitt Mustangs
    Will it fit my Mustang?
    • Bullitt - 01
    • GT - 99, 00, 01, 02, 03, 04
    • Mach 1 - 03, 04

    Fits GT, Mach 1, and Bullitt

    People Who Bought This Item Also Bought

    Customer Photos (64) Submit Your Photo

    View All 64 Photos

    You Might Also Like

    24 Questions / 12 Answers

    Ask a Question

    Loudness? How do these compare with the slp loudmouth catback, because I want to get the loudest and the sound clips are all pretty close.


    • I wouldn't invest much in the sound clips. When i got my SLP Loudmouth and installed it on my 04 GT it sounded nothing like it, the clips likely have modified midpipes,headers, or both. In my opinion, the SLP might be a little louder but also not as smooth. I believe that the Borla provides the best sound. If you want good sound and truly want to do it right, do the headers and midpipe as well, not just the catback, this will give you best sound and performance.


    Show 2 more answers Helpful (7)

    will this fit my 00' mustang v6? i have a 2000 mustang v6 i was wondering would this fit it


    • As a direct bolt on, no this will not fit your 2000 V6. However, if you couple the GT catback with the V6 dual exhaust adapter kit, attached below, you will be able to install both without any problems!


    Show 1 more answer Helpful (2)

    will this fit on my automatic if so what other accessories do i need for the install


    • Yes will fit an auto or manual doesn't matter. And should come with everything needed to install.


    Show 2 more answers Helpful (1)

    Can this somehow fit my 97 gt? With some time of alterations, can this fit my 1997 Mustang gt? I love the sound and want nothing other than borla.


    • Yes. Take this awesome system to a shop who has experience with exhaust fab work and welding. A Mustang shop or a speed shop in your area will have no problems finding appropriate hanger locations to mount the system.


    Show 1 more answer Helpful (1)

    will this fit in my '03, I'm planning on putting BBK long tube headers and H-pipe with catts.


    • The Borla Stinger S-Type Cat-Back Exhaust will work with an 2003 GT. It is designed to bolt to the factory mid-pipe.


    Helpful (0)

    How much horsepower would you think I'd be adding if I got this? It says increase in hp I was just wondering how much.


    • Power gains with the Borla Stinger S-Type Cat-Back Exhaust will vary based on which model and year you have (fits 1999-2004 GT, Bullitt, and Mach1) as well as any existing modifications. Typical gains are around 10-15hp.

      Rob D

    Helpful (0)

    More Products You Might Like

    Customer Reviews (100+) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Loudness / Volume 4.756302 4.8
    • Exhaust Note 4.925 4.9
    • Fit & Finish 4.816667 4.8
    • Bang For Your Buck 4.733333 4.7

    • 5/5

      August 10, 2009

      Best Catback

      Got this catback on my 04 GT and its just plain awesome. I didnt know what catback to get it was so hard to get one i looked at every other brand but in the end Borla is the way to go..this catback is stainless steel and it comes with borla's million mile warranty so you know its going to outlast every other cat back. The sound is how a V8 muscle car should sound..not obnoxiously loud or raspy like a fart can muffler and not too low its got the perfect roar to it..of course will sound better if you add an aftermarket midipe as well..If you dont know which way to go id definetly take the borla route. you wont be disappointed!

      Tony T

      Year: 2004 Submodel: GT

      Helpful (48)

    • 5/5

      January 08, 2011

      Borla Stinger S-Type Catback

      I have been looking for an exhaust catback for over 3 years. over this period of time I looked at every single exhaust and studied and listened to them all. It was one of the hardest decision I have been faced with. But in the end, Borla topped them all. I listened to all the sound clips of it and i just want to say that Borla sounds sooo much better in person then through speakers. sound will get distorted through speakers. If you are struggling to pick an exhaust, go for Borla. You wont be disappointed. They look sick too!! I could honestly say I was more happy to get my Borla exhaust then the mustang GT itself. There is only one drawback thow, your neighbors will hate you, But who cares about that, there just jealous. I highly recommend the Borla Stingers S-Type Catback!!!

      Alex P

      Helpful (29)

    • 5/5

      November 22, 2009

      Great Product

      Borla hit the nail on the head when they made this catback. Very nice system, that not only sounds incredable...but also looks good too. The rolled tips make a huge difference in appearence. I still remember the day we had it installed on our 03 GT and the guy fired up the car...My wife and I were in the waiting room and we both looked at eachother and she asked me if that was our car. In other want something that'll turn heads, then buy this system...Thanks Borla and American Muscle!

      Steven Woertink

      Year: 2003 Submodel: GT

      Helpful (25)

    • 5/5

      November 28, 2009

      Borla Stinger S-Type Cat-Back Exhaust

      I just purchased and installed the Borla Stinger S-Type Cat-Back Exhaust system on my 2001 Bullitt # 3807. I could not be happier with the outcome. Installation was simple and not cutting or welding required. The Stingers are all bolt on and are a simple installation. However I did have access to a hydraulic lift at the Fort Sam Houston Auto Craft Shop. Although, I did had to cut the stock exhaust to maneuver it out though. The sound is incredible! It provides a deep bass sound with a tough growl. There is no highway drone either. At high speeds it quiets down, but in 1st, 2nd , and 3rd gears it sounds it sounds very tough and intimidating. I highly recommend the Borla Stinger S-Type Cat-Back Exhaust system!!!

      Jake P

      Year: 2001

      Helpful (20)

    • 5/5

      Installation Time: Less than 1 Hour

      October 01, 2011

      I am a Master Certified Technician for 30 years and rate this product with an A+

      Today I would like to focus on American Muscle's customer service. I felt I received exceptional go beyond the norm results in replacement of a part shipped to me that was missing parts. My son was home from college for the weekend. We had planned a Father and Son project where we were going to replace the exhaust system on his Mustang GT. Upon opening the box, it became apparent that many parts were missing. This also happened to be a holiday weekend. When I contacted the customer service department and explained my situation, they informed me that they were unable to get a replacement shipment to me until the following Monday. At this point I had no choice but to send the parts back and figure out another time to do this with my Son. My Son was extremely disappointed and figured he would have to wait another term at college for this to happen. Shortly after hanging up the phone with the gentlemen trying to help me, I received a call back. This was amazing to me as I had not left a number and considered the matter done. When I picked up the phone it was the same gentlemen calling back to tell me that he had also done projects with his Son and did not want to be the person to ruin that opportunity for us. They arranged for me to receive an overnight air freight shipment to replace my order and issued a call tag for the other. I was able to complete my project with my Son and needless to say he was thrilled with both me and the Company's response. I must say this Company has a customer for life. Great way to go!!!!! Jeff Clark


      Year: 2003 Submodel: GT Lewiston

      Helpful (18)

    • 5/5

      July 10, 2010

      Great Exhaust

      Just got these mounted up yesterday with a Magnaflow X-pipe with cats. What a great sound. Not raspy at all as some told me before buying. If your thinking of getting these quit listening to all the haters because of the price tag and just do it!


      Helpful (14)

    • 5/5

      August 15, 2009

      Wont disappoint

      This exhaust is tame at idle (except first thing in the morning when you fire up your Mustang), but the moment you hit the throttle be ready to turn heads. Get used to attention if you install this exhaust. This is the way a Mustang GT was meant to sound. I'm running BBK Shorty header and BBK Hi-Flo catted X-Pipe plus a laundry list of other mods. Flat out the best exhaust you can buy for the Mustang GT. The tips look amazing as well. I get compliments from men and women alike. ( More so from the Ladies)

      Jeremy O

      Helpful (14)

    • 5/5

      August 15, 2010


      i installed the stingers on my 02 gt with an off road midpipe and long tube headers. when i first fired it up i walked back inside and my wife asked if i chased down that loud truck that blew by and i had to tell her no that was the car backing out of the driveway. GREAT exhaust!

      chris clardy

      Year: 2002 Submodel: GT

      Helpful (12)

    • 5/5

      February 17, 2010

      Borla cat-back

      Instructions said install time is 3 hours-my wife and I got it done in just about that time. Had a few minor glitches interpreting the directions, but overall, it was fairly simple. Have had the Borlas on for a week and immediately noticed more torque/horsepower. A little loud on the low-end or at rapid acceleration, but we've gotten used to it and it does turn heads. No excess noise at cruising speeds. Nice, deep rumble when you want it.


      Helpful (12)

    • 5/5

      June 27, 2009


      Helpful (11)

    • 5/5

      Installation Time: Afternoon

      February 21, 2012

      Impressive Cat-Back

      In a perfect world, it would be great to have the luxury of driving an identical car as yours equipped with an identical exhaust system before you purchased it for yourself. Unfortunately, this is not usually the case and it's a roll of the dice when shopping for an aftermarket setup. I took the "Mama Bear" approach to this and was looking for a cat-back that wasn't too hot nor too cold. I wanted one that was just right. The Borla S-type was a good choice overall. First, I was impressed to see how it was boxed at the factory. Borla uses an expandable foam to house the exhaust components, and the box was literally filled with it to protect the contents. The polished 4" tips were also bagged with bubble wrap as an extra precaution to ensure no damage during shipping. The welds at the mufflers looked very good, and there was no missing parts in the kit. I had the system professionally installed and the mechanic said that the fit was "good". It took him a little over an hour to remove the stock pipes and install the new ones. All parts forward of the Borla system remained stock. When he started it up, everyone in the shop commented on how good it sounded. It's significantly louder than the stock Mach system, both from the road and inside the cabin. I was more concerned about the "dreaded drone" that most folks complain about with just about every aftermarket exhaust system, regardless of the manufacturer. But this system seems to be absent from that for the most part. There is, however, a resonance that peaks around 2000 rpm and is most noticeable under mild acceleration. It's enough to vibrate the plastic inside the cabin, but is short-lived because of its narrow band and I can easily accelerate through it. By the way, this resonance varies a bit with temperature. At cruising, it's not objectionable unless you have to pull a bit going up hill. I'm learning to avoid that particular rpm, although it equates to about 120 kph (75 mph) in 5th gear which is a decent cruising speed, but will attract the RCMP in this neck of the woods. So I'll drive a little slower on the highway, no big deal. In general, whether it be on the highway or around town, the cabin noise is acceptable and you can still carry on a conversation if you choose to do so. Myself, I'd rather listen to the exhaust note. Although it might be psychological, the car seems to have a little more go, and I'm convinced that it's more responsive to the throttle. The burble on deceleration is more noticeable compared to stock as one might expect. It sounds phenomenal under full throttle but I'm careful around my own neighborhood. The neighbors haven't keyed the car yet and they're still speaking to me so I guess that's a good sign that it's not too barky. The polished 4" tips really do belong on a Mustang ... they look awesome and hang perfectly. All in all, the Borla Stinger cat-back is a great sounding, very well manufactured system and I got it at a fair price from AM. I would recommend it to anyone interested in a more aggressive upgrade to their Mustang. Thanks AM, you haven't heard the last from me yet!


      Year: 2003 Submodel: Mach 1 Victoria, BC, Canada

      Helpful (10)

    • 5/5

      March 07, 2010

      Borla-S, 2004 40th GT

      I spent several months looking for an exhaust with good quality as well as sound. straight out of the box i noticed the 4" tips which looked intimidating without even being on the car. I had them installed by a local shop and couldnt be more pleased with how they came out. upon starting the car there was a huge difference. Sounds like they did back in the 60's, pure muscle. Similar to what chris had said the exhaust is at its best when just taking off putting it to the floor. There is ZERO drone at cruising speeds. If you want to be loud all the time i'd suggest an X-Pipe. I still find it more satisfying without one though. In closing a great product, happy i chose it over the SLP's. Sounds mean, Sounds american, and sounds like a mustang.

      James T

      Year: 2004 Submodel: GT

      Helpful (10)

    • 5/5

      February 07, 2010

      good quality

      From my mom shaking her head, to all my friends giving compliments. this exhaust really changed the way my car sounds. From the time i opened the box, i knew that this was gonna be a good exhaust, and the way it looks is just incredible. if you are looking for a deep tone with that amazing whipple sound when u take ur foot off the cluch, these pipes will turn ur world around. My mach 1 has a sexy sound with an aggressive take off. american muscle was out of stock on this and said it would be 3 weeks. i got it in two days. so i wanna thank american muscle for their great service and great product.

      jason L

      Helpful (8)

    • 5/5

      Installation Time: Shop Install

      September 20, 2011

      The best choice is Borla.

      After watching all the videos and sound clips of exhausts, I always came back to Borla, and today I finally had this catback intalled on my 04 GT and I couldn't be happier with it! It has the right combination of growl under acceleration but it is nearly as subtle as the factory exhaust when cruising at highway speeds. Thanks Borla and thanks AM!


      Year: 2004 Submodel: GT Marion, AR

      Helpful (7)

    • 5/5

      January 25, 2010


      Mine just got here today and went and got them installed asap! Been driving for about four hours because I don't want to stop. Im still smiling, this was an amazing purchase and the sound is unbeatable on my 02 GT. 5 stars for AM as well for offering free shipping and good service all around oh and by the way you really can't beat this price!

      Blake C.

      Year: 2002 Submodel: GT

      Helpful (7)

    • 4/5

      May 08, 2011

      Borla Stinger S-Type Catback Exhaust on 2001 Bullitt

      The Borla exhaust was an easy install for my friends at Canadian Tire Garage. The fit was perfect. The 4 inch tips look as good as they sound. Little disapointed that the only part that was polished was the tips, so I polished the rest of the exhaust to match. The sound is alot louder then stock Bullitt exhaust, I would not like it on my daily driver, but then again I'm getting close to 50. American Muscle has great customer service, delivery was fast and they follow up to see how you liked the products they are selling.I would recommend this to Guy's that like the sound of old school muscle cars for sure.


      Year: 2001 Submodel: Bullitt

      Helpful (6)

    • 4/5

      Installation Time: Afternoon

      February 21, 2012

      Good Choice!!!

      I just installed this exhaust on my Mach and it sound phenomenal. It has a nice deep tone rumble to it, definitely not obnoxious sounding. They are decently quiet at cruising speeds.. no drone or anything like that. I installed these myself, the hardest part is getting the old exhaust off of the rubber hangers. Just make sure you spray some lubricant on it and they will pop off with a little effort. I would absolutely recommend this product!


      Year: 2004 Submodel: Mach 1 PA

      Helpful (5)

    • 5/5

      October 20, 2010

      Perfect Tone!!

      Ordered these and it took two business days to get here (Awesome). Perfect exhaust tone and great fit....took less than an hour to remove old exhaust (flowmaster...Phew) and install the stingers. I have a bbk o/r x-pipe and let me tell you what this is a great combo. hardly any drone and just the right amount of pure american muscle loudness. Thanks american muscle for another great product and superb service with super fast shipping.


      Helpful (5)

    • 5/5

      May 24, 2010

      04' GT

      Went back and forth between the Borla stinger's and the Magnaflow systems. The Borla catback system not only is a straight forward, simple and easy install, but is definitely superior in sound. If you really want to open it up and make it sound louder get the Magnaflow o/r X pipe to go with it.


      Year: 2004 Submodel: GT

      Helpful (5)

    • 5/5

      February 19, 2010


      This exhaust is by far one of the best for a Mach 1. All I need now is a good X pipe.


      Helpful (4)

    Related Mustang Categories