Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $5,000 For Your Mustang! Enter daily!

Magnaflow Competition Cat-Back Exhaust - 2.5in. (99-04 GT, Mach 1)

$0.00
Market Price $748.99 You Save 12% ($86.17)
Our Price

$662.82

FREE Shipping

  • Item 48013

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, Video & Details

    • Aggressive Muscle Car Sound
    • Competition Series Mufflers
    • 2.5" Mandrel-Bent Stainless Tubing
    • 3.5" Polished Stainless Tips
    • Fits 1999-2004 GT, Bullitt and Mach 1 Mustangs

    Review & Installation Video

    Review & Install Video

    Hi I’m Justin with AmericanMuscle.com, and I’m taking a closer look at the Magnaflow Magnapack catback exhaust fitting the 99-04 Mustang GT and Mach 1. The Magnapack gets its name from these two Bullitt style mufflers, which are a throwback to the classic 60’s and 70’s fastback mufflers, and the sound you get from using this exhaust reflects that. The entire system features full stainless steel construction throughout including these straight through design Magnapack mufflers, the 2.5” mandrel bent tubing, all exiting out these 3.5” brightly polished tips. Because Ford chose to weld the factory exhaust on these cars, you will need to cut it off before getting started with the install. Once you have it out of the way, getting the new Magnaflow system installed should only take you about 2 hours from start to finish. Now let’s hear how Magnaflow’s Magnapack sounds compared to our factory exhaust.

    Free Flowing Exhaust. Magnaflow delivers the ultimate free flowing exhaust for the 1999-2004 GT, Bullitt and Mach 1 Mustangs with the Competition Cat-Back Exhaust System. By eliminating power robbing restrictions. this catback will put more horsepower and torque where it belongs - at the rear wheels.

    Aggressive Muscle Car Sound. The Magnaflow Competition Cat-Back Exhaust System, with its pair of straight-through bullet-style competition mufflers, will give your Mustang the loud aggressive exhaust note of the muscle cars of yesteryear.

    Quality Construction. Each piece is made from mandrel bent 2.5" stainless steel tubing for long life and a perfect fit. The system ends with brightly polished 3.5" stainless tips, that exit in the stock location for impressive good looks. The OEM-style barbed hangers are designed to ensure easy installation and precise fit.

    Application. Made to be a direct bolt on, this Magnaflow Competition Cat-Back Exhaust System will bolt straight up to the factory Mid Pipe without any extra modifications required on 1999-2004 GT, 2001 Bullitt and 2003-2004 Mach 1 Mustangs, to give it a deeper, aggressive sound.

    Note: Coupon codes cannot be applied to this product.

    Fitment: 1999 2000 2001 2002 2003 2004 Details

    MPN# 15673

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    • (2) Flow Tubes
    • (2) Tail Pipes
    • (2) Competition Mufflers
    • (2) Polished Tips
    • (2) Set Screws w/ Allen Wrench
    • (2) Tip Hangers
    • (6) 1.25" x 2.5" Band Clamps
    • (2) Header Mounting Flanges
    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: Straight-through Fitment: 1999-2004 GT, Mach 1, Bullitt
    Will it fit my Mustang?

      Customer Photos (29) Submit Your Photo

      View All 29 Photos

        Questions & Answers (17)

        5 Top Rated Questions

        will mac pro chamber work with this i am in the market for an exhaust i am thinking about getting mac long tubes w/ pro chamber and not exactly sure about cat back byt like the sound of the magna pack my question is will all these components work together

        • Yes the prochamber will work with the magnapacks, this is the setup i currently have on my 2000 gt and it sounds amazing

        Helpful (2) Show 1 more answer

        Will this fit a v6 with v6 x-pipe

        • No, this Catback was designed to only fit V8 model Mustangs.

        Helpful (1)

        to install this in a 04 Mach 1 would I need anything else like x pipes or would this be the only thing I need to buy for the entire system?

        • Nothing else would be needed for the install no.

        Helpful (0)

        I’m looking to create a true dual exhaust for my V6 using magnaflow a magnaflow cat-back. Will this or another magnaflow connect to a Pypes catted X-pipe or another catted X-pipe?

        In my area I have to have cats and a muffler does this have both of those

        • This kit does come with Mufflers, but as a Cat-back does not include cats.

        Helpful (0)
        Post Your Question
        10 More Questions
        I'm curious if this cat-back is what people refer to as "Magnapacks" or if they are two different mufflers/set ups. The item is Magnaflow competition series. Is that set up the Magnapacks as they call it or is Magnapacks a completely different set up? 1 answer
        Will this exhaust be able to pass emissions test in California? Does it have a carb #? 1 answer
        Will this exhaust work with a 5.0L Coyote Engine swap? 1 answer
        Will this fit a manual? 1 answer
        I plan on getting this exhaust for my 2003 V6 mustang and was wondering if the Pypes catted X pipe will allow this to fit? With the Pypes catted X pipe and this exhaust will it be crazy raspy like I've been hearing on the Pypes exhausts? How loud would this be on a scale from 1 to 10? I want a head turner, but nothing that is going to get me pulled over. I want a nice deep tone at idle and for it to be heard when I step on it. any help would be GREATLY appreciated. Sorry for the beginners questions I'm just getting started in the pony world. 1 answer
        I live in California and the emmission regulations are strict. Will this competion catback exhaust pass the emmission test? I'm getting the BBK shorty headers, true dual adapter ( I have a v6 ) and these if they pass the emmission test. If not is it better to get the other magnaflow street catback exhaust? 2 answers
        V6? Will these fit the 02 v6 with the pace settler dual exhaust adapter kit? 1 answer
        Will these pypes work with your PaceSetter V6 Dual Exhaust Adapter Kit (99-04 V6) I have a 99 v6 mustang and i want to make my stang into dual exhuast, but i don't want to use the same factory y-pipe set up and i don't want to buy any dual exhaust converter catback systems neither. I want the true dual. WIll this work or should i buy an H-pipe somewhere else and stick those on with the Magnaflow MAgnapack Catback exhuast. 1 answer
        magnapacks vs slp loudmouth II I like the sound of both the magnaflow magnapacks and slp loudmouth II's because they both have a deep aggressive tone. I'm trying to decide between one or the other. As of right now my mustang is bone stock. I like the deep agressive tones but i don't want something that is extremely loud which is the only reason I'm afraid of the loudmouth II's. Which of the two exhuast systems are liuder/would be better suited for me? 5 answers
        will this bolt up to a bbk off road x-pipe the one on this site for the (99-04) GT 3 answers

          Customer Reviews (100+) Write a Review

          Overall Rating 4.9

          out of 5 stars

          Installation Time:Afternoon

          Installation Cost:$100-$250

          • Loudness / Volume 4.489362 4.5
          • Exhaust Note 4.787234 4.8
          • Fit & Finish 4.659575 4.7
          • Bang For Your Buck 4.574468 4.6



          • 5/5

            Installation Time: Afternoon

            December 10, 2018

            Just woke up my 1999

            Tight tolerances, awesome performance and sound increase

            GT35

            Year: 1999 Submodel: GT

            Helpful (4)

          • 5/5

            November 23, 2018

            I have this in Cali

            To start off, I absolutely love this setup. Its loud enough to set off car alarms but not too loud as to wear your constantly waking up your neighbors if you start your car up lmao. I live in San Diego and have this set up attached to the stock 6 cats on my 99 GT and it will pass emissions tests with flying colors. So if your in Cali and want an AWESOME sound for your GT and want to stay legal, then this is the way to go.

            HunterP

            Year: 1999 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            August 16, 2018

            Best exhaust hands down

            Like the title says, it’s the best exhaust system for your 99-04! A very deep and not obnoxiously loud exhaust by itself. But if you pair it with a BBK O/R x-pipe like I did, watch out! It sounds like a monster unleashed! Very deep and actually not too loud at highway speeds, can have a convo. Would highly recommend!

            JeremyG

            Year: 2001 Submodel: GT

            Helpful (7)

          • 5/5

            Installation Time: Afternoon

            April 29, 2018

            Awesome exhaust

            Sounds so sweet! Very good design and great product.

            DanielS

            Year: 2003 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Less than 1 Hour

            April 02, 2018

            Magnaflow

            Omg The difference. I went from a completely stock set up to this catback. No headers, stock H pipe with cats and the sound was still amazing. Highly recommend this. At idle the sound is low enough not to annoy neighbors but once you get on it... wow that rumble.

            Moe

            Year: 2002 Submodel: GT

            Helpful (7)

          • 4/5

            Installation Time: Afternoon

            November 25, 2017

            cat back

            nice unit its loud magna flow allmstainlees steel had all connections weilded

            peterm

            Year: 2004 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            November 23, 2017

            Great Sound

            Had stock exhaust on my wife's 2001 GT, MAN this cat back exhaust sounds GREAT! Not sure about any increase in HP, but the amazing sound makes it feel like it, LOL

            JimBo43

            Year: 2001 Submodel: GT

            Helpful (8)

          • 4/5

            Installation Time: Afternoon

            November 19, 2017

            Very happy with this exhaust!

            You should add $50 to the price and throw in some hangars and stainless flange studs.

            Donald

            Year: 1999 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Shop Install

            August 24, 2017

            Magnaflow

            Perfect sound for the Mustang! Even in the convertible, it's throaty, but not too loud! Aggressive and smooth!

            MarkD

            Year: 2004 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Less than 1 Hour

            August 23, 2017

            PERFECT CATBACKS

            Best exhaust pipes. Great sound I love it. I have them on my mustang ft 2002 and every time i accelerate it... I just love the sound of it

            Jesse

            Year: 2002 Submodel: GT

            Helpful (7)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $100-$250

            August 22, 2017

            Purr-fect sound!

            I have had Magnaflow exhaust on other vehicles by choice and for good reason. I did plenty of research for my 2002 Mustang GT before I settled on this particular version. The sound is affected by other exhaust mods, such as the x-pipe and high-flow cats on mine. Without the cats it would have been just too loud. As this is not my daily driver I wasn't overly concerned about the aggressive note; once installed and heard on my specific application, I could not be happier! Mustangs have such a distinct sound anyway, and as far as I'm concerned, this is how a GT should sound. For me, it doesn't get any better! I am very glad I had this professionally installed as they needed a torch to heat some slip-fit connections to remove the old exhaust. After everything was lined up to perfection and bolted, they gave each joint two tack welds to keep it from moving around. I do not have a lift or welding tools so for me it was well worth the added expense.

            rcul8r

            Year: 2002 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Afternoon

            July 27, 2017

            Sound great and easy to install!

            They took me and a friend about four hours to do, since the car was just up on jack stands. It's a little difficult working on the exhaust while laying on the floor but we got it done. My 02 GT is otherwise stock and this exhaust is perfect. A nice quiet rumble when idling, and if you don't want to be too loud but sound really good, you can. But as soon as you put your foot down, it's very loud and amazing sounding. I would recommend this to anyone

            chiefbossjawn

            Year: 2002 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Afternoon

            July 04, 2017

            GREAT TONE.

            System fits very well and was easy to install. Sounds great, not to obnoxious, relatively quiet until you press the gas pedal. Then it gives you a nice but lightly aggressive tone.

            NormanL

            Year: 2004 Submodel: Mach 1

            Helpful (8)

          • 5/5

            Installation Time: Afternoon

            March 28, 2017

            Great Exhaust

            I've had this system on my 2003 GT for a little over a year now and I absolutely love it. I have it paired with an O/R H-pipe and man is it loud. You can hear this thing from far away. It gives great sounds all throughout the powerband as gives great pops and gurgles at times. If you're looking for something a little louder than normal and with a different sound than the ever so common Flowmasters, go with these Magnaflow!

            stangguy03

            Year: 2003 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Afternoon

            November 06, 2016

            Simple sweet sound

            Well made parts that fit well. A "no problems" choice.

            WhiteApe

            Year: 2001 Submodel: GT

            Helpful (8)

          • 4/5

            Installation Time: Shop Install

            October 14, 2016

            Magnaflows Rock!!

            Great exhaust. I would definitely buy again. The car sounds great like a mustang should. There is no unwanted drone in the car It is pretty quiet but when you step on it it sounds awesome. Buy it.

            Mach2280

            Year: 2000 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Less than 1 Hour

            May 30, 2016

            Magnapack cat back

            Great exhaust spent several months looking for the right one I had flow master 40 series but they where just to quiet the old style bullitt mufflers are much louder and no drone perfect for daily driving I have a factory exhaust manifold soon to be long tube headers and off road x but I would highly recommend this exhaust. Also the 3 in a half inch tips add a great look to it definitely spend the extra money. Sound quality in the videos is quiet compared to in person much louder videos DO NOT do the justice.

            Wheels3

            Year: 2002 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Afternoon

            May 23, 2016

            Perfect

            Great fit, easy to install , sound amasing ! Thx AM

            Max

            Year: 1999 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Afternoon

            May 16, 2016

            Awesome exhaust sounds amazing

            Exhaust was really easy to install. Now sounds like a mustang couldn't be happier. I've installed many exhaust systems and this was one of the most straight forward I've done.

            DizeNB

            Year: 2004 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Afternoon

            May 16, 2016

            Sweet old school sound

            Love my new exhaust system by magna flow cat back...straight forward assembly. ..hardest part was removing my stock exhaust...if you like the old school "throaty" sound of muscle cars of the past. ..this is it.

            articford

            Year: 2004 Submodel: GT

            Helpful (8)

          Related Mustang Categories