Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST

Free Shipping On Orders Over $49. Details

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

Market Price $847.99 You Save 17% ($148.00)
On Sale


FREE Shipping
  • Item 31106
  • MPN# 46995S

In Stock Ships same business day. Choose options to add to cart

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

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

Fits GT, Mach 1, and Bullitt

Most Helpful Reviews

Best Catback I have Owned

I have owned the SLP Loudmouth One catback with an o/r x pipe and it was just way to obnoxious. Then I switched to Flowmaster 40 series and they were nice but a tad bit quiet for me. I purchased and ...

Read More
Helpful (11)

the beast from hell

i just threw on this xhaust system , immediately you hear hear the difference and you feel an increase in horsepower , i just gained bout 20 horse power with switching out my stock system deep rumble ...

Read More
Helpful (5)

Overall Rating 4.7 out of 5 stars
Read All 26 Reviews

Customer Photos (7) Submit Your Photo

View All 7 Photos

You Might Also Like

4 Questions / 6 Answers

Ask a Question

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


Show 2 more answers Helpful (0)

More Products You Might Like

Customer Reviews (26) Write a Review

Overall Rating 4.7

out of 5 stars

Installation Time:Afternoon

  • Loudness / Volume 4.176471 4.2
  • Exhaust Note 4.882353 4.9
  • Fit & Finish 4.352941 4.4
  • Bang For Your Buck 4.294117 4.3

  • 5/5

    February 20, 2009

    Best Catback I have Owned

    I have owned the SLP Loudmouth One catback with an o/r x pipe and it was just way to obnoxious. Then I switched to Flowmaster 40 series and they were nice but a tad bit quiet for me. I purchased and installed Bassani this week and the sound and quality is awesome. Love the tips and the polished stainless mufflers. Awesome Product


    Helpful (11)

  • 5/5

    April 17, 2010

    the beast from hell

    i just threw on this xhaust system , immediately you hear hear the difference and you feel an increase in horsepower , i just gained bout 20 horse power with switching out my stock system deep rumble exhaust with very little to no drone , highly recommended , intimidating 3.5 inch tips, i would take out the stock baffles for increase in sounds .


    Helpful (5)

  • 5/5

    December 30, 2009

    Sound Of Freedom

    Incredible system on my 03 GT Stang. Sound is music to my ears when on the throttle. Awesome tone with a hint of pleasant drone. Only gonna sound better as I build the car for more horses. I think it's time to order the Bassani catted X-pipe. Quality Is Number 1!


    Year: 2003 Submodel: GT

    Helpful (5)

  • 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 (4)

  • 5/5

    August 05, 2010

    Move over Magnaflow

    Ive had both magnaflow and now this and let me tell you If you want your mustang to sound like a stampede you really have to buy this exhaust system not only do you feel the gain in horse power right away ,but you get goose bumps just from the loud bark when you hit that pedal and take off !

    Mike M

    Helpful (4)

  • 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 (3)

  • 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 (2)

  • 5/5

    August 02, 2010


    with out a doubt THE BEST sounding and performing exhaust made today.


    Helpful (2)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 14, 2012




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

    Helpful (1)

  • 5/5

    March 19, 2009

    Bassani Catback

    I had these installed on my 99 GT and the sound is unbeatable. Bassani gives the GT exhaust a fantastic sound, not the cheap flowmaster rattle.


    Year: 1999 Submodel: GT

    Helpful (1)

  • 5/5

    January 12, 2009

    great mach 1 exhaust

    awesome exhaust. a lil more expensive than the others but well worth it as no comparison for first since these are finely engineered and not just some pieces of metal put together. not very loud at first but once you take off the silencers it comes with, WOW!!!!makes it come alive.


    Helpful (1)

  • 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 (0)

  • 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 (0)

  • 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 (0)

  • 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 (0)

  • 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 (0)

Related Mustang Categories