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MAC Dual Exhaust Conversion Kit (99-04 V6)

Market Price $436.95 You Save 13% ($57.00)
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  • Item 40048
  • MPN# TK3849

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    Features & Details

    • Adds the Look and Sound of a V8
    • Bolts Up to the Stock Factory Y Pipe
    • 2.5" Aluminized Steel Tubing
    • 3" Polished Stainless Steel Tips
    • "Flow Path" Chambered Mufflers
    • Fits 1999-2004 V6 Mustangs
    V8 Look And Sound. If you're looking to give your V6 Pony the dual exhaust look and aggressive sound of a V8, look no further than the MAC Dual Exhaust Conversion Kit from AmericanMuscle. 

    Flow Path Mufflers. MAC Flow Path Chambered Mufflers feature a patented multi passage design, following Helmholtz's Theory of Tone, to produce a muffler that effectively flows exiting exhaust gases all while maintaining a desirable tone. With no packing that can burn out, Flow Path Mufflers will sound the same mile after mile, year after year.

    No Cutting or Welding Required. Unlike other aftermarket V6 dual exhaust kits that require cutting and welding the stock Mid Pipe, the MAC Performance Dual Exhaust Cat-Back system simply bolts right up to the stock Y-pipe for a no hassle installation. Just bolt on and go!

    High Quality Construction. Mandrel bent from durable 2.5" aluminized Steel tubing for strength and corrosion resistance, this MAC Performance Dual Cat-Back features two "Flow Path" chambered mufflers with massive 3" diameter polished stainless steel tips for classic muscle car sound and looks.

    Application. The MAC Performance Dual Exhaust Cat-Back System is designed as a direct bolt-on to the existing factory Y-pipe on any 1999 to 2004 3.8L or 3.9L V6 Mustang for more power and a more aggressive sound.

    Technical Note. When buying a dual cat-back exhaust kit for your 1999-2004 V6 Mustang, you will need to select the "Exhaust Hanger Kit" from the drop down option menu above to properly install your new exhaust.

    Installation Note: AmericanMuscle recommends changing to a 1999-2004 GT rear fascia so the tips fit properly.

    Fitment: 1999 2000 2001 2002 2003 2004 Details

    What's in the Box
    • (1) Y-Pipe
    • (2) Muffler Assemblies
    • (2) Tail pipes
    • (2) Exhaust Tips
    • (2) Clamps
    • (2) Hangers
    • (8) Threaded Studs
    • (8) Nuts
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: Aluminized Steel Tip Material : Polished Stainless Steel
    Piping Size: 2.5" Tip Size: 3"
    Muffler Type: Chambered Fitment: 1999-2004 V6 Mustangs
    Will it fit my Mustang?
    • V6 - 99, 00, 01, 02, 03, 04

    People Who Bought This Item Also Bought

    Most Helpful Reviews

    Video w/ Sound Clips on this Review

    I really love this exhaust on my 2000 V6. The only other performance mod I have is the $70 cold air intake also from american muscle. These two parts REALLY shine together. The exhaust has a really deep ...

    Read More
    Helpful (41)

    Loud Start up.

    ordered it on Monday and got it Wednesday morning, cant beat the shipping. this is probably the BEST dual exhaust for your v6, the start up is ridiculously loud and so is the revving. sounds great when ...

    Read More
    Helpful (32)

    Overall Rating 4.4 out of 5 stars
    Read All 100+ Reviews

    Customer Photos (69) Submit Your Photo

    View All 69 Photos

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    34 Questions / 14 Answers

    Ask a Question

    Does this include hangers for the right side?


    • Judging from what I have read and understand about the MAC Conversion Kit the short answer is no. You will need to purchase a hangar kit to ensure proper installment. Pypes Hangar Kit seems to work fine and is not expensive, most exhaust shops will tell you when converting to a true dual exhaust, a hangar kit is essential if you want to actually have that dual exhaust.


    Show 2 more answers Helpful (4)

    I have a 2000 v6 3.8L mustang. How labor intensive is putting in a whole new exhast? With my mustang just having one exhast running straight back would everything line up ok going all the way back if i were to buy the MAC duel Echast Conversion Kit? i just want to make sure im buying the right one! Thanks!


    • Yes it would I literally just got it put on today and it took my shop person 2 hours to do it looks and sounds amazing the exhaust lines up even on both sides. You have to buy the pypes hanger kit from americanmuscle along with the mac kit to have all of the parts needed. I also recommend getting a cold air intake to make it sound to its full potential. How this helped!!!


    Show 4 more answers Helpful (2)

    Is this California CARB (smog) legal? Do they have an identification number tag if so?


    • This catback does not alter or move the location of the catalytic converter and will not affect emissions. The exhaust is legal for the use in California and states that have adopted their emission standards, however, it does not have a CARB OE number as it does not alter emissions.


    Helpful (1)

    Any HP/Torque Gains? even though it's not a complete dual exhaust, will it still have any HP/Torque gains?


    • Yes you will have some again but your better off adding a bama tuner kit or a better cold air intake and throttle body kit


    Show 3 more answers Helpful (1)

    Is it possible to upgrade this to a true dual system by replacing the y pipe included in this kit with the Pypes 2.5 in. Stainless Steel Replacement Flow Tube Kit, and installing a Pypes off road x-pipe to my BBK Shorty Headers? I’m not sure if it would not line up or fit correctly


    Will this product be able to be put on a 96 mustang?


    • Unfortunately this MAC Dual Exhaust Conversion Kit is only intended for 99'-04' Mustang V6's. This will not work on a 96' Mustang.


    Helpful (0)

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    Customer Reviews (100+) Write a Review

    Overall Rating 4.4

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Loudness / Volume 4.12782 4.1
    • Exhaust Note 4.43609 4.4
    • Fit & Finish 4.12782 4.1
    • Bang For Your Buck 4.571429 4.6

    • 5/5

      Installation Time: Less than 1 Hour

      May 18, 2012

      Video w/ Sound Clips on this Review

      I really love this exhaust on my 2000 V6. The only other performance mod I have is the $70 cold air intake also from american muscle. These two parts REALLY shine together. The exhaust has a really deep aggressive start up and then comes back down to a modest growl as you idle. Accelerating at launch is also nice and loud but again, once you hit your cruising speed it really calms down. I love that it doesn't sound phony like a bottle rocket screaming down the road. VERY happy I invested in this exhaust! As everyone else says, buy the pypes hanger kit in the exhaust section of American Muscle. My mechanic said install was virtually impossible without the hanger kit.


      Year: 2000 Submodel: V6 Tucson, AZ, USA

      Helpful (41)

    • 5/5

      Installation Time: Less than 1 Hour

      September 18, 2011

      Loud Start up.

      ordered it on Monday and got it Wednesday morning, cant beat the shipping. this is probably the BEST dual exhaust for your v6, the start up is ridiculously loud and so is the revving. sounds great when your on the road and took about 45 minutes to install, but you NEED TO NEED TO NEED TO order the "Pypes exhaust hanger kit" otherwise you'll never be able to get the exhaust installed.


      Year: 2004 Submodel: V6

      Helpful (32)

    • 5/5

      Installation Time: Afternoon

      September 21, 2011

      Best Bolt On Exhaust on the Market for the Mustang 3.8 and 3.9

      Great addition to anyones V-6 Mustang. I didn't buy from AM as I got it shipped for $270 from another site, but either way the improvement this exhaust makes is very noticable. Once tuned and in combo with a CAI, it allows the car to have more low end kick especially but throughout the entire RPM range. Sounds its best with said CAI and tune but even without provides a deep rumble at idle and a very nice growl even at WOT. Sound under acceleration is quite noticable inside the car and outside it and even at freeway crusing speeds you can hear its low growl which is very nice (and feel it...the mufflers sit up and in under the body so there is a nice pleasant vibration from them under your feet at higher speeds). Make sure you purchase a hangar kit for this as you need the two rear hangars and an additional front hangar on the RIGHT side (but be aware that this MAC may have hangars that are too thick for the PYPES kit, see my review of that part regarding that). Installation is easy for any muffler shop and can be done by a DIY person though I would advise two people if you're not using a lift. Of course you are not going to get the sound or performance of an H pipe with this, but you also don't have to cut, weld or mod anything to use this...and you'll stay emission compliant. I would say if you want a nice throaty sound for your V-6, a bit more performance, something that looks really good and you don't have alot of cash, this is the best exhaust out there. If you shop around for the unit AND for the labor, you should be able to get this on your car for under $400-I did it for $350...well worth it.


      Year: 2004 Submodel: V6

      Helpful (17)

    • 5/5

      August 11, 2011

      Best for the price

      First of all, I ordered this somewhere else but wanted to put my review here. The exhaust sounds amazing & looks great. Now I always have my windows rolled down because I love the sound. Especially when you start it now I am actually proud of my v6 now. I highly recommend this turns heads too. Oh and also I did this with jack stands so it is possible with them.


      Year: 2000 Submodel: V6

      Helpful (13)

    • 5/5

      August 03, 2011


      bought from AM bone stock mustang v6 5 speed..couldnt decide from flows or this and so glad I choose this. This was so much cheaper and heck those tips stickin out the back looks so sick people already asked me if it was a gt and I just laughed.. But sounds great.. No ricey poop sounding exhaust.. Deep lower toned growl.. Sounds mean especially round 3000 rpms it's many looks and heads turned it's insane.. Barely can even hear inside of car with windows down or up so it's quiet but 50 times louder outside it's great

      Brad Bonar

      Year: 2002 Submodel: V6

      Helpful (12)

    • 5/5

      July 06, 2011

      Good Mod, Worth the Money!

      Likes: - Easy Install - Great Price for Quality Construction - Throaty Sound - Fits well under V6 bumper (Pypes hanger kit) Dislikes: - needs to have slip joint at muffler vice weld. This limits necessary tweaks to clear frame, drive shaft and control arms. Not a big deal but does limit perfect fit. See pics, about 1/2 inch low rt side

      John Lasseter

      Year: 1999 Submodel: V6

      Helpful (11)

    • 5/5

      June 27, 2011


      Whoever submitted the picture, did you have to modify it to fit the V6 Fascia...I thought I would have to cut the bumper to fit the two pipes in or buy a GT Fascia, if not that would be awesome..?!


      Year: 2003 Submodel: V6

      Helpful (10)

    • 5/5

      May 18, 2011

      MAC Catback

      Best recommended exhaust for the V6. I was very pleased with the sound. No rasp, just low growl. Didn't purchase from AM as i got it about a year ago. Very easy install, make sure you have GT hangers. Highly recommend!


      Year: 2003 Submodel: V6

      Helpful (10)

    • 5/5

      May 16, 2011

      MAC Y-Pipe Exhaust

      I didn't purchase this exhaust from AM as they've just started carrying it, but if you're looking for what I believe is the best sound throughout the entire band for a stock/slightly modified V6 then stop here, this IS what you're looking for! Be sure to pick up some new exhaust hangers while you're at it and install will be a breeze.


      Year: 2001 Submodel: V6

      Helpful (9)

    • 5/5

      Installation Time: Full Day

      April 27, 2013

      Great sound!!

      I took a month deciding which exhaust to choose, and by far this is the best one!! My friend and I installed it with not much expirience. I sounds better than a gt in my opinion and looks great without the bumper cutouts. Overall choose this one if you are still deciding on an exhaust for your v6


      Year: 2003 Submodel: V6 Colorado, USA

      Helpful (6)

    • 5/5

      Installation Time: Afternoon

      March 21, 2013

      GT looks and sound!! But v6 mpg!!

      Took me a year to decide what exhaust to get for my v6. Wanted gt styling and sound but also easy on the wallet. Was worried about getting a exhaust that made sound ricy. Not the case with this Mac setup!! It was straight forward bolt-in kit. Passenger side is a little tight by the frame and control arm. Helpful hint!! Buy the pypes hanger kit!! Or it will be impossible. Took about 2 hours to install in my drive way. After I installed it took it around the block and people whip the heads to see if its a gt. No performance gain that I noticed but awesome sound. Great product!!


      Year: 2001 Submodel: V6 Greeley, CO, USA

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      December 17, 2012

      Great buy for the money

      If you're looking for a good upgrade to you V6 in this price range, don't even think twice about buying this. My car went from having virtually no sound to turning heads everywhere I go. The start up is loud and the sound emitted from stepping on the accelerator is a deep, aggressive rumble. Install time was about 40 minutes but that's because my uncle works at a Ford dealership so we put it up on a lift and had the best tools for the job. As stated in other reviews, you also have to buy the hanging kit but other than that this is a GREAT modification. I bought the SLP Loudmouth II mufflers to put on as well but have yet to get them welded on, I'm actually not even sure if I want to change the sound now..


      Year: 1999 Submodel: V6 Philadelphia, PA, USA

      Helpful (5)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      November 08, 2012

      no downside!

      Every aspect of this exhaust kit is great. Sounds great, looks great. The sound isnt much louder, but it's very rumbly and has a nice startup sound. Little interior sound at crusing speeds, but when accelerating slowly or quickly there is a nice inside noise with the windows down. At 1400 rpm it subtly shakes the whole car, so it's a great noise. At around 3300 rpm it really opens up. Cost me 60$ to install at a shop, and only took about 45 minutes. I will probably cut the stock.and Mac Y pipes and get straight pipes welded to the cats, with a crossover pipe. Bottomline, dont spend 700$ on an exhaust kit, buy this!


      Year: 2004 Submodel: V6

      Helpful (5)

    • 5/5

      Installation Time: Afternoon

      May 01, 2012

      Love it!!

      Love the tone! It took me a while to choose between true duals or this and im happy with my choice! Best sound is around 2500 to 3000 rpms, and cruising at around 1300rpms. Great bang for the buck!


      Year: 2001 Submodel: V6 Concord, NC

      Helpful (5)

    • 1/5

      Installation Time: Full Day

      August 30, 2017

      this thing is worthless!

      i bought this with high hopes, im not a mechanic so i had by brother put it on, first off it says approx 2 hour install time, its more like 6, hes ase certified and it took that long, also he said alot of the pieces didnt fit, he ended up using some rubber bushings from the stock exhaust, and i took it for a ride and there was horrible grinding/vibrating sound, he said its such a tight fit it may be vibrating against the gas tank, overall im so beyond disappointed, i definitely wont be buying an exhaust from here ever again


      Year: 2002 Submodel: V6

      Helpful (3)

    • 5/5

      Installation Time: Full Day

      August 25, 2012


      I love this exhaust. It's perfect besides the included tip hangers. I have a Gt bumper cover and with the tip hangers, they sit too low. I had to cut/shorten and weld them so theyd sit up in the cut outs. The bolt on design of the system was easy to install. People say it sounds like a V8. I installed them on jackstands in my driveway, so it can be done at home. I highly recommend this system.


      Year: 2000 Submodel: V6 New Mexico

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      July 14, 2012


      I am a 15 year old boy and installed the exhaust on my 99 mustang in an hour. The first thing I noticed was how amazing it made my mustang look. It looked mean and fast. Then I started her up and noticed how loud it was. I knew right away it was a great exhaust. I can hear it in my cabin while listening to music at around 2000 RPM'S. Best money spent on this car so far. GET IT.


      Year: 1999 Submodel: V6 Chicago, IL, USA

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      May 23, 2012


      Wish it was a little louder at first but as soon as you drive a full tank worth and the mufflers break in, the sound is amazing. Get stares accelerating all the time and the rev is unbelievable. AMAZING PRODUCT for the price.


      Year: 2000 Submodel: V6 Ottawa, Ontario, Canada

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      April 14, 2012

      Great product!

      First off, i ordered these on Sunday and got them Tuesday, shipping is fantastic. They took about four hours to install and its a lot easier if you take off the back wheels. You need to order the Pypes exhausts hangar kit or you wont be able to install it. The start up is really loud and it has a deep "grunt" around 2000rpm. Definitely worth the money and time!


      Year: 2004 Submodel: V6

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      March 19, 2012

      Best on the Market

      So i have been looking for an exhaust for some time now for my 03 v6 it has a cold air intake and 4.10 gears so it was time to get a nice tone to her. I couldn't decide what i wanted to go with straight pipes or what but then i saw the Mac system. I installed it in less than a day (i am no mechanic by any means) and it was as easy as tightening a few bolts. I WOULD HIGHLY RECOMMEND THIS TO ANY ONE WITH A 99-04 v6 looking for a great sounding mustang. the only problem that i ran into is a decided not to get the pypes hanger kit with the system and it came back to bite me had to put a universal one on but it all worked out. i have a picture of my exhaust posted above its the blue azure stang. I promise you will not be disappointed i believe this is the best exhaust system for your mustang and no doubt best bang for your buck


      Year: 2003 Submodel: V6 New York

      Helpful (3)

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