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SR Performance Cat-Back Exhaust (99-04 GT, Mach 1)

Item 389690
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      Review & Installation Video

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Aggressive Muscle Car Sound
      • Chambered Mufflers
      • 16 Gauge Aluminized Steel Construction
      • 2.5" Mandrel-Bent Tubing
      • 3.5" Polished 202 Stainless Steel Tips
      • Fits 1999-2004 GT, Bullitt and Mach 1 Mustangs


      Muscle Car Sound. Add a classic muscle car exhaust note to your New Edge 4.6L V8 Mustang with a SR Performance Cat-Back Exhaust System. This SR Performance Cat-Back Exhaust features a pair of chambered mufflers to produce an aggressive sound that everyone will love.

      Muscle Car Appearance. This SR Performance Cat-Back exhaust system not only gives your New Edge Mustang an aggressive muscle car sound, but it also gives it a classic muscle car appearance with a set of 3.5" polished 202 stainless steel exhaust tips.

      Aluminized Steel Construction. Constructed from durable 16 gauge aluminized steel tubing for strength and corrosion resistance, this SR Performance Cat-Back Exhaust System features smooth mandrel-bends and chambered mufflers for improved exhaust flow and sound.

      Direct Bolt-On Installation. Engineered to be a direct upgrade replacement for your Mustangs factory exhaust, the SR Performance Cat-Back Exhaust Kit easily bolts up in the stock location with no modifications required.

      Application. This SR Performance Cat-Back Exhaust System is designed to fit the 1999-2004 GT, 2001 Bullitt and 2003-2004 Mach 1 Mustang models.

      SR Performance

      Fitment: 1999 2000 2001 2002 2003 2004 Details

      MPN# 389690

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (66)

      Write a Review

      Ratings Summary

      4.0 out of 5 overall rating from 66 customers

      Installation Time: Full Day

      Installation Cost: $100-$250

      • March 15, 2020

        4 2002 GT - Boomer36 Installation Time: Afternoon

        2002 sonic blue gt

        Easy install. Only had to cut down one pipe for fitment. Sounds great with my sve cat delete x pipe. For the price definitely recommend. Took about hour and a half to install. Installation tip if you're doing it on the ground, remove rear wheels pipes slide right over the axle.

        Helpful (1)
      • February 17, 2020

        4 2000 GT - mwalters Installation Time: Shop Install

        Great product at a great price

        Good bang for the buck - most economical system on here. Fit was decent. Just wish the tips were a little larger diameter. Mellow sound, not too loud.

        Helpful (0)
      • January 14, 2020

        5 2000 GT - jim32865 Installation Time: Afternoon

        Awesome sound

        I ordered and had it quickly. Went together easily. It has the sound I was looking for. Together with the BBI shorty headers it sounds like a mustang should.

        Helpful (0)
      • July 25, 2019

        5 2003 GT - jfe Installation Time: Less than 1 Hour

        cat back

        great exhaust , no rumble inside car or vibrations , it's a rag top too

        Helpful (1)
      • July 18, 2019

        4 2001 GT - Log16

        Great overall product

        Install was fairly easy, and it sounds great. Not the loudest exhaust out there, but for the price you just can’t beat it.

        Helpful (1)
      • July 05, 2019

        1 2004 V6 - 383strokerswapp Installation Time: Less than 1 Hour

        Did not fit

        I bought this for my 04 mustang gt and the arc that goes around the axel was too big, almost like it was ment for a truck. But ended up buying an arc from AutoZone and using them anyways.

        Helpful (2)
      • June 13, 2019

        1 2004 GT - Keane Installation Time: Afternoon


        The product requires heavy modification if your vehicle is lowered. The exhaust does not go over the axle correctly and your tips will not align properly. After cutting and welding on multiple different pieces I got the system to fit and it sounded terrible. I have no cats and the system still makes no noise. Very disappointed, you get what you paid for.

        Helpful (2)
      • May 15, 2019

        3 2002 V6 - Geared Installation Time: Afternoon

        SLP dual exhaust

        Mufflers not true 2.5 ... They expanded inlet and outlet to fit 2.5.. Had to cut one of the pipes to make system fit. Definitely need help w hanging system makes job easier w two .Sounds good.. Customer service was very helpful w my issue

        Helpful (1)
      • May 13, 2019

        5 1999 GT - aronO Installation Time: Afternoon

        Great Sound

        Took a few trail but got it to fit Great! Sounds Great!

        Helpful (0)
      • May 11, 2019

        5 2003 GT - Bomber Installation Time: Full Day


        The exhaust system fit perfectly. Was able to install with no problem and they sound great.

        Helpful (0)

      Questions & Answers (43 answers)

      5 Top Rated Questions

      In the exhaust clip video is it with a mid pipe with converters or without?

      • The exhaust clip of the SR Performance Cat-Back Exhaust is shown with a stock H pipe with cats.

      Helpful (2)

      why no video of this cat back? I want to hear it before I buy it.

      • We have brought many new items on board, and we unfortunately do not have a video up yet, we apologize. We try to get as many videos up as soon as possible and we look forward to having a video soon!

      Helpful (2)

      I bought my 04 GT with a BBK H pipe cat delete. it is a 2.5". will this system bolt on to that?

      • Yes, the BBK mid-pipe will work with this exhaust system.

      Helpful (1)

      Does the SR kit drone on the highway with the stock H pipe for the GT? I like to change my stock mufflers but also want to have a conversation in my car with a passager at 70 MPH. Thanks!

      • This exhaust will not cause droning when at highway speeds.

      Helpful (1)

      Is this an entire exahust system? Does it come with everything I need, including the intermediate pipes to replace my stock exahust ?

      • The SR Performance Cat-Back Exhaust does not come with a mid-pipe. This Cat-Back is designed to bolt up to the stock location.

      Helpful (1)
      10 More Questions
      will this be a direct fit to my 01 mustang gt or do i have to purchase something else with this? 2 answers
      Would these fit a base model V6 2003 mustang? 1 answer
      How many inches long is the exhaust tip? 0 answer
      Will this work with stock set up . Do I need anything else or is this all I will need . Will if sound better than stock . 1 answer
      Would it be possible to change out the mufflers in this kit in the future to something else without welding? Say, a flow master 40? 0 answer
      I have a Pypes O/R X pipe and flowmaster 40's. The flowmaster 40's were great with the stock catted H pipe but now with the O/R X pipe it is too loud and raspy. Does anyone have an idea how this cat back exhaust sounds with an O/R X pipe? I am looking for a deeper less raspy tone than the 40's have. Would the magnaflow or borla touring with the O/R X pipe be best? 1 answer
      Are there any issues installing on a car that has been lowered, I know most are but I've heard this cause issues with some brands. 1 answer
      Does the SR Performance Cat-Back Exhaust have tapped location for O2 sensors? 1 answer
      Will this bolt up to my pace setter x pipe? 1 answer
      I like the price of this system, I currently have pace setter headers and x pipe. I am not sure what I need that will bolt up to the x pipe to complete my exhaust system. Will this work? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Chambered Mufflers
      • (2) Extension Pipes
      • (2) Over Axle Pipes
      • (2) Exhaust Tips
      • (2) Muffler Hangers
      • (2) Tailpipe Hangers
      • (4) U Clamps
      • Hardware Kit

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material:Aluminized Steel Tip Material :Polished 202 Stainless Steel
      Piping Size:2.5"Tip Size:3.5"
      Muffler Type:ChamberedFitment:1999-2004 GT, Mach 1, Bullitt

      Will It Fit My Mustang

      • Bullitt - 01
      • GT - 99, 00, 01, 02, 03, 04
      • Mach 1 - 03, 04

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