Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
Every day 8:30AM EST - 11:00PM EST
Win 1 of 3 Exhaust Kits! Enter Daily!

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

Market Price $847.99 You Save 12% ($98.00)
Starting At


FREE Shipping

  • Item 31106
  • MPN# 46995S

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.

Will this fit your Vehicle?

In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    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 Sound.
    • Performance Mufflers & Stainless Tips.
    • Durable Stainless Steel.
    • Lifetime Warranty.
    • Fits 99-04 GT, 01 Bullitt 03-04 Mach 1 Mustangs.
    Aggressive Exhaust Note. Bassani's Cat-Back exhaust system with it's chambered performance mufflers will give your 1999-2004 GT or Mach 1 Mustang a more aggressive exhaust note, than that of the stock GT.

    Looks and Performance. This Cat Back exhaust from Bassani features 4X8 performance mufflers that end with a 3.5" rolled edge slash cut polished stainless tip that exit in the stock location for great looks and an increase in power.

    Lifetime Warranty. The Bassani Cat-Back is precision-engineered from resilient stainless steel for long lasting durability and is backed by Bassani's Lifetime Warranty.

    Fitment. This Axle-Back exhaust system will fit the 1999-2004 GT and the 2003-2004 Mach 1 Mustangs for great looks and great sound.

    Fitment: 1999 2000 2001 2002 2003 2004 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (2) Muffler assemblies/li>
    • (2) Over axle pipes
    • (2) Exhaust Tips
    • (4) Clamps
    • (4) Bolts
    • (4) Washers
    • (4) Nuts
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
    Piping Size: 2.5" Tip Size: 3.5"
    Muffler Type: Chambered Fitment: 99-04 GT / Mach 1 / Bullitt Mustangs
    Will it fit my Mustang?

    You Might Also Like

    Customer Photos (7) Submit Your Photo

    View All 7 Photos

    Questions & Answers (4)

    4 Top Rated Questions

    Can I use this along with a x-pipe on my v6? Can this fatback exhaust work with a X-pipe designed for a v6? Will there be any problems with the height of the tips under the rear bumper? I don't want to be cheap when I upgrade my exhaust. I also plan on changing into new shorty headers as well.

    • Yes you can!

    Helpful (2)

    Can I install this on a 99-04 V6?

    • This Axle-Back exhaust system is designed to fit the 1999-2004 GT and the 2003-2004 Mach 1 Mustangs.

    Helpful (0)

    Will this fit well with BBK long tube headers and a BBK offroad X pipe?

    • Yes No problem. They replace the cat back you have now. Sound is awesome!!!!!!

    Helpful (0)

    will this exhaust system increase hp and gas mileage I want to increase hp and would like to know the best way to accomplish this. I was considering a chip but don't know if they really work Thanks for your reply

    • up to 5HP gas mileage prob not because it will be louder and you will drive faster because it sounds cool causing you to burn more gas

    Helpful (0) Show 2 more answers
    Post Your Question

    Customer Reviews (28) Write a Review

    Overall Rating 4.7

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$500-$1000

    • Loudness / Volume 4.157895 4.2
    • Exhaust Note 4.894737 4.9
    • Fit & Finish 4.421052 4.4
    • Bang For Your Buck 4.31579 4.3

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      May 28, 2018

      vroom vroom

      This was purchased for my wife with BBK headers and X-pipe, when she started it I became her hero, Happy wife, happy life, thanks AM.


      Year: 2002 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      January 07, 2018


      The fit and finish is great. I really like the sound,not to loud.can't wait to get on the road. American has been a great company to deal with so far.


      Year: 2001 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      September 02, 2017


      Deep throaty rumble that just sounds awesome. Definitely should take out the baffles


      Year: 2002 Submodel: GT

      Helpful (3)

    • 2/5

      Installation Time: Full Day

      July 25, 2017

      Did not fit, required cutting

      This exhaust didn't fit correctly. I cut off the old exhaust because it was easier, not expecting this very expensive Bassani to not fit correctly. It was too long, about 2.5 inches on the left and 2 on the right. Kind of sad it was off and not even on both sides. American Muscle asked for pictures and made the return a hassle. Ground shipment back to the east coast from California and waiting for a new part would have had me driving an car with no mufflers for a couple weeks. I will never buy an exhaust system from AM again, beware this does not fit without modification in some cases. Other than the poor fit and lame customer service, the exhaust does sound great.


      Year: 2004 Submodel: Mach 1

      Helpful (5)

    • 4/5

      Installation Time: Weekend

      June 12, 2017

      Bassani Exhaust for Mach 1

      Sounds great. Took out resonators in the tips a few days after installing the exhaust. Also, when installing the exhaust I tried using an electric impacted drill. I had to use a pneumatic impact gun to tighten the clamps. Makes sense but, yeah that was the only problem I made.


      Year: 2004 Submodel: Mach 1

      Helpful (3)

    • 3/5

      Installation Time: Less than 1 Hour

      April 26, 2017


      Sound is great clamps wouldnt tighten the pipes all the way.


      Year: 2003 Submodel: Mach 1

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      February 01, 2017

      17 years without any trouble...

      June of 2000 I bought my first and only brand new car: My Ford Mustang GT 'vert. 3 days later ordered the Bassani X pipe (legal) and this cat-back. When they say they're engineered to last, they are not kidding. 17 years and no rust anywhere I or my mechanic can see. And the sound of the system is just awesome. No raspy empty noise, no drone at highway, etc. A nice deep bass rumble and (at least in my ride) a nice burble-burble-burble on decel in gear. It does not need to all-out thunder roar all the time - it gets it's point across at the stoplight just fine with that bass rumble. I had it all installed together, I expect most of the sound improvement is the cat-back but the X, I'm told, changes the sound somewhat also as it's flowing differently, etc. Last word? BUY WITH CONFIDENCE! -JD


      Year: 2000 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      June 22, 2016

      Best Exhaust

      WOW I've heard flowmaster and magnaflow on mustangs but bassani beats then all not too loud and not to quiet when your going you hear that exhaust you feel more top end on your car


      Year: 2002 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      December 15, 2015

      The best out there

      I've had a few bassani products in the past. They make a great quality product with a deep and aggressive sound to back it up. Also made a great power upgrade to my 2003 gt. It's worth the extra money. Bassani all the way!


      Year: 2003 Submodel: GT Marshfield,Wi

      Helpful (5)

    • 5/5

      Installation Time: Afternoon

      August 31, 2015

      Great tone with no drone, just tuned

      I spent a long time looking for the right catback for my daily driver and narrowed it down to this and the stingers. Don't get me wrong all of the exhaust companies are unique but this catback is the least that I have heard and I really just wanted to be different and not eventually get annoyed. Installed over a week ago and about 500 miles later and I still love it. At this point on I only want basset exhaust products. Thank bassani for their work and thank AM for being able to provide such a great product on the east coast


      Year: 2004 Submodel: GT NJ

      Helpful (7)

    • 5/5

      Installation Time: Full Day

      June 12, 2014

      utter SWEETNESS

      I'm so happy I bought Bassani!! I absoutley love them!!! They sound so nice! Still have to burn them out but I'm going to be putting headers on so it will sound so sweet! Installation was a pain but well worth it!!


      Year: 2003 Submodel: GT Minnesota

      Helpful (4)

    • 4/5

      Installation Time: Less than 1 Hour

      October 24, 2013

      Great Product

      I installed this catback at the same time I did the Kooks header and x pipe install. I had to ding my set up that I got for a couple of reasons. I know Bassani is a quality brand and everything looked good upon opening the box for the first time. Not a big issue getting this lined up, but working on a garage floor, on your back doesn't help. My main issue is that the clamps did not secure the pipes where they connected. We'd get them lined up, slide them in, tighten the clamps, and it would move. A lot. Even the mufflers we couldn't get straight and I had a couple of days of scraping going over some unavoidable bumps. And the tips wouldn't stay in place either. I took it to a shop here that specialize in exhaust systems and even he couldn't get the system to stay tight. He had to make a couple of small welds to keep everything sturdy and together. The exhaust was initially quiet and I had the "silencers" removed and it was noticeably louder. Even with the long tubes and x pipe it's not raspy or extremely loud. I hoped for louder, but I am pleased with the overall sound.


      Year: 2002 Submodel: GT Newmarket, Suffolk CB8, UK

      Helpful (4)

    • 4/5

      Installation Time: Full Day

      September 04, 2013

      Smooth sounding exhaust...

      Great exhaust. I love the exhaust note, it is very smooth, no rattle. Really nice product, I found the install was pretty easy, even by myself in the garage with a pair of floor jacks. It did take me a while to do the full install, but I found removing the old exhaust on my '02 with 220 000 kms was the most time consuming. Install wasn't too bad, it just took me a few attempts to get the alignment of the mufflers and tips just right. I would definitely buy this product again and recommend it to anyone who wants a smooth "neighborhood friendly" exhaust, it sounds great in 2nd gear around 2000-3000 rpm with the top down!


      Year: 2002 Submodel: GT Pain Court, Ontario, Canada

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      May 01, 2013


      Awesome exhaust note!!! First mod that i did, and I got a lot of compliments!! My dad went out and got it for his 03 right afterwards! Highly recommend. Louder than stock, but not obnoxious. I cannot say enough about the exhaust note, really sounds great!


      Year: 1994 Submodel: Cobra

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      February 04, 2013

      Very impressed!!

      I researched many different exhaust companies when choosing my catback. I wanted a catback that was stainless steel, aggressive sounding without being obnaxious. This Bassani catback is the perfect blend of a straight thru design, with a chambered muffler style sound. I have been a flowmaster user in the past, but now will never go back! Bassani A++


      Year: 2003 Submodel: Mach 1 Crockett, CA, USA

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      October 14, 2012




      Year: 2003 Submodel: Mach 1 Senatobia, MS, USA

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      July 08, 2012

      Words cannot describe how amazing this sounds

      This catback is simply the best sounding catback for the 2valve mustang. PERIOD no arguement. with a stock mid pipe it sounded very nice yet quiet under normal driving conditions. with a o/r x pipe its simply amazing.Im a flowmaster kind of guy but this is a awesome product. Anyone looking for a catback exhaust please do you self a favor and dont let the price alarm you. its worth every penny.(luckly I was fortunate enough to have purchased the car with it already installed but I wanted to express my opinion about this.)


      Year: 2003 Submodel: GT maryland

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      June 19, 2012

      Bassani is quality

      Bassani does make some quality pieces. You definately pay, but they're made in the USA. Good note. Good fit and finish.


      Year: 2003 Submodel: Cobra Ohio

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      January 28, 2012

      Great buy

      Little more expensive but definitely worth it. Looks beautiful and sounds perfect!


      Year: 2001 Submodel: Bullitt

      Helpful (3)

    • 5/5

      March 01, 2011

      awesome exhaust

      I have to say, i have owned the Bassani catback with the catted X pipe for about a year now and it sounds bad ass. I am adding the shorty BBK ceramic headers this week, that should make it sound even better. The Bassani exhaust is a little more expensive than the other ones but well worth the money. If you want your car to sound right... get Bassani

      benry placek

      Year: 2003 Submodel: GT

      Helpful (9)

    Related Mustang Categories