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Pypes Violator Cat-Back Exhaust with Polished Tips (98-04 GT; 03-04 Mach 1)

Item 20005
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      Review & Installation Video

      Hey I’m Justin with, and I’m taking a closer look at the Pypes violator series catback exhaust, fitting the 98-04 Mustang GT, Mach 1, and Bullitt. Pypes exhaust systems usually feature very aggressive tones and it’s the same with the violator kit shown here. The name comes from the two violator series mufflers that this entire kit is built around. They actually feature mini sound deflectors in place of the traditional baffles, which will really allow your 4.6 to be heard. As for the construction we’re looking at full 409 grade stainless throughout, including the 2.5” mandrel bent tubing, the violator mufflers, and those 3.5” OE style polished tips. We do have this exact same kit used on our 98 GT bolt on build up, in conjunction with Pypes’ off road X-pipe which they refer to as their beast setup, and let me just say I am a really big fan of this exhaust. As for the install you will need to cut your factory exhaust just to remove it entirely but after that the new Pypes system should install without modification in about 2 hours. Now let’s hear how the Pypes violator series catback sounds compared to our factory exhaust.

      Product Information

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


      • Increases of 8 to 13 Horsepower
      • Aggressive Sound Profile
      • 2.5" 409 Stainless Steel Tubing
      • 3.5" Polished 304 Stainless Steel Tips
      • Fits 1998-2004 GT, Bullitt, & Mach 1 Mustangs


      Increase In Performance. Bolting on a Pypes Violator Cat-Back system to a stock 1998 to 2004 GT will yield an instant 8 to 13 horsepower gain. It features two of Pypes Violator mufflers for the ultimate in flow and power gains with an aggressive rude sound.

      Aggressive Sound. Pypes CatBack features the Violator "Rude Sound" muffler that uses an internal louvered tube with mini sound deflector chambers that result of a unique aggressive muscle car sound.

      Quality Materials. This Pypes Cat-Back Exhaust is constructed from free flowing mandrel bent 2.5" 409 stainless steel tubing and features Pypes Violator chambered mufflers for an aggressive throaty sound. The whole system is finished off with a set of 3.5" Polished 304 stainless steel tips for classic Muscle Car styling.

      Application. The Pypes Violator Cat-Back Exhaust kit is specifically designed to simply bolt-on to the existing stock H-Pipe of any 1998 to 2004 4.6L GT, Bullitt, or Mach 1 Mustang for more power and a more aggressive sound.

      Fitment: 1998 1999 2000 2001 2002 2003 2004 Details

      MPN# SFM27V

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (67)

      Write a Review

      Ratings Summary

      4.5 out of 5 overall rating from 67 customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • August 18, 2019

        5 2000 GT - Jonesin4Hockey Installation Time: Shop Install Installation Cost: 0-$100


        These were a great add. Great tone but not obnoxious unless you want them to be. If you get on it, these will turn heads. Shop install was $100 and they said they were not just a simple bolt on. Took a lot of twisting and turning to get aligned properly.

        Helpful (0)
      • July 01, 2019

        5 2001 GT - 2vmike Installation Time: Shop Install Installation Cost: $100-$250

        love the product

        love the sound runs smoother good bang for your buck

        Helpful (0)
      • December 06, 2018

        3 2003 GT - ChadT


        Nice set of cat backs easy to install. There a little louder than I was wanting. All my friends love the sound. I installed them in 3 hours easy .

        Helpful (3)
      • November 20, 2018

        5 2003 GT - NoelC Installation Time: Full Day

        Great products

        I had these installed at a shop, but one of the muffler tips was bent the shop claims they cam like that but i check them before bring them to the shop and they were not bent everything was perfect, either way the install went well and the stang grrrrrrrr like it should. i will be buying a replacement pipe. i will continue to purchase.

        Helpful (2)
      • November 13, 2018

        5 1999 GT - RobertR Installation Time: Afternoon

        Worth 5 smiles

        I bought and installed my violators and absolutely love their sound. I have already bought my next Mustang and will definitely be buying some violators for it soon.

        Helpful (3)
      • August 13, 2018

        5 2004 GT - JosephG


        The sound is awesome and it has more get up. Good buy for the money. Had custom shop install

        Helpful (4)
      • July 03, 2018

        5 2004 GT - ChrisK Installation Time: Shop Install Installation Cost: $100-$250

        Love this Exhaust System

        This system sounds great! It's noticeably louder than the stock exhaust on my 04 GT when running through the gears, but at higher cruising speeds, it's nice and quiet with no drone whatsoever. The stainless tips look great too! I had a shop install it, so I can't comment on the installation process.

        Helpful (5)
      • May 06, 2018

        5 1999 GT - MichaelD Installation Time: Afternoon


        I had a very old flowmaster exhaust that I loved, for over 10 years till a very bad rock on a dirt road. This new exhaust changes the whole car. She was loud before but now she's nasty. I'm very happy with my purchase. Got here fast and with no damage I couldn't be happier

        Helpful (5)
      • May 04, 2018

        5 2004 GT - NicholasN Installation Time: Less than 1 Hour

        Pypes Violator

        They installed perfectly. Quiet at idle and cruise. Loud when you need them to.

        Helpful (5)
      • April 04, 2018

        4 2002 GT - MarkW Installation Time: Afternoon

        Pypes Exhaust

        Overall very pleased with the system. There were some issues installing over the rear axle. I would recommend this system.

        Helpful (5)

      Questions & Answers (14 answers)

      5 Top Rated Questions

      Is this legal in California? Will it pass smog?

      • Only headers and catalytic converters are affected by somg tests. If the exhaust you are looking at doesn't involve these pieces then you have nothing to worry about.

      Helpful (3)

      Is it compatible with a 01 v6

      • In order to use this Violator Catback (or any other GT catback) on your V6, you would have to install either the Pypes Catted or Off-road X-pipe designed for the V6 or use the V6 Dual Exhaust Adapter Kit. I've attached all (3) options below so you can take a look and decide which would be best for your application. One of these mid-pipes would then allow this or any other GT catback to bolt up without issue! Hope this helps!

      Helpful (2)


      • Correct, this system will work on either the coupe or the convertible.

      Helpful (1) Show 1 more answer

      Can I install some Stock Catholic Converters on this and if so well it affect the strength of the noise and HP and well the smog check pass on California?

      • The Pypes Violator Cat-Back Exhaust is a cat back system which means it mounts behind the cats you already have.

      Helpful (0)

      Looking for an exhaust I can put on my my 2000 v6 with an o/r x pipe and was wondering how this compared to the pypes pipe bombs?

      • The Violator exhaust from Pypes actually has a slightly deeper exhaust tone when compared to the Pipe Bombs. Being you have an o/r mid-pipe already, I would recommend the Pipe Bombs which is more mild. With that being said, it really will depend on the exhaust sound you're looking to go with for your vehicle.

      Helpful (0)
      Post Your Question
      9 More Questions
      Do i really need the electronic pip cut kits I have a convertible 4.6L Mustang GT 2000 1 answer
      I just ask a question able fitment for my 2003 GT Premium but I read it fits coupe and convertible so all I need to know is about the tips you say the Pypes catback come with 3-1/2 tips which is what I want with the SFM27V other places say 3 in just want to make sure before buying. 1 answer
      I want to give my 02 GT a more aggressive sound to it and this seems like it, but it is also my daily driver. I'm not much of a mechanic and I want to know will it cause my Check Engine light to come on? 1 answer
      I have a 2000 V6, what else do i need to purchase to be able to use this exhaust set up? 1 answer
      Do you have to purchase the off-road X-pipe in order to use this efficiently? I am planning on buying these for my 2000 GT convertible but was wondering if I have to buy the off-road X-pipe in order to get best results or if it will be fine either way? 2 answers
      will this work on my 04 v6 with the dual exhaust adapter? if i buy the dual exhaust adapter and then get the pypes violater catback system, will it work ? matt 1 answer
      What headers should I use with this exhaust? What headers ? 2 answers
      Can this be installed in my driveway? Are they any problems with leaks? 2 answers
      I already have a off road x-pipe would this beable to conect to it? 2 answers

      Installation & What's in the Box

      Installation Info

      What's in the Box

      Hardware included:
      • (4) 2.5" U clamps
      • (2) Muffler hangers
      • (2) Tailpipe hangers
      • Hardware kit (fastners, etc.)

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material: 409 Stainless Steel Tip Material : Polished 304 Stainless Steel
      Piping Size: 2.5" Tip Size: 3.5"
      Muffler Type: Chambered Fitment: 1998-2004 GT / Mach 1 / Bullitt Mustangs

      Will It Fit My Mustang

      • Bullitt - 01
      • GT - 98, 99, 00, 01, 02, 03, 04
      • Mach 1 - 03, 04

      Fits GT, Mach 1, and Bullitt

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