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

Market Price $713.31 You Save 12% ($82.06)
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  • Item 48013
  • MPN# 15673

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    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

    CA Residents: Warning: California's Proposition 65

    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?

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    Customer Photos (29) Submit Your Photo

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    Questions & Answers (14)

    5 Top Rated Questions

    Will this fit a v6 with v6 x-pipe

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

    Helpful (1)

    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 (1) Show 1 more answer

    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?

    • Yes, the Magnaflow Competition Cat-Back Exhaust uses Magnaflow's Magnapack mufflers in this system.

    Helpful (0)

    Will this exhaust be able to pass emissions test in California? Does it have a carb #?

    • Unfortunately this Magnaflow Competition Cat-Back Exhaust is not tested or approved by the California Air Resource Board meaning it is not legal for use upon public roads in California.

    Helpful (0)

    Will this exhaust work with a 5.0L Coyote Engine swap?

    • If the headers and mid pipe used in the 5.0 swap met at the same position as the stock 99-04 mid pipe then yes this catback would work.

    Helpful (0)
    Post Your Question
    9 More Questions
    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
    Welding? Will I have to weld everything together? 3 answers
    Is it TOO loud? I have a '99 V6 Mustang & I was planning to combine this with some BBK shorty headers. Would it be extremely loud with both or would I be ok with just the Magnaflow exhaust? 2 answers

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

    • Loudness / Volume 4.488889 4.5
    • Exhaust Note 4.777778 4.8
    • Fit & Finish 4.644444 4.6
    • Bang For Your Buck 4.555555 4.6



    • 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 (1)

    • 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 (2)

    • 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 (1)

    • 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 (2)

    • 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 (3)

    • 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 (3)

    • 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 (2)

    • 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 (2)

    • 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 (3)

    • 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 (4)

    • 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 (2)

    • 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 (3)

    • 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 (2)

    • 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 (3)

    • 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 (3)

    • 5/5

      Installation Time: Afternoon

      May 23, 2016

      Perfect

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

      Max

      Year: 1999 Submodel: GT

      Helpful (3)

    • 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 (3)

    • 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 (3)

    • 5/5

      Installation Time: Afternoon

      January 04, 2016

      Very happy !

      Great product I had flow masters replace with the Magnaflow competition. Great sound easy to install I highly recommend it.

      Ricky

      Year: 2001 Submodel: GT Miami, FL

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      October 13, 2014

      Loud!

      This exhaust is perfect if you want your neighbors to know you're coming, but still maintains that signature Magnaflow, as well as Mustang sound! The larger tips give it an awesome look out back too.

      Rogue

      Year: 2004 Submodel: Mach 1 Gap, PA, USA

      Helpful (4)

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