Customer Reviews (24) Write a Review

Overall Rating 4

out of 5 stars

Installation Time:Full Day

Installation Cost:$250-$500

• Performance Gain 4.363636 4.4
• Fit 3.869565 3.9

• 3/5

  Installation Time: Full Day

  March 27, 2018

  Great!....but

  I’ve had these headers for a while, good perforance gain, good looking...but the fitment is not good at all. The driver side header was rubbing on the steering shaft even after having a shop try their best to fix it. Ended up getting polyurethane motor mounts to raise the engine a little and that did the trick!

  JaceR

  Year: 2006 Submodel: GT

  Helpful (2) Thanks for your input!

  • Performance Gain 3

    3

  • Fit 2

    2
• 2/5

  Installation Time: Full Day

  March 08, 2018

  They look great, but...

  I bought these headers about a month ago, and AM was quick to ship. I wrapped the headers with titanium exhaust wrap, and they looked beautiful. I installed these headers myself, and it was a real pain. The steering linkage, starter motor, and both motor mounts must be removed, and the engine lifted slightly to allow for clearance. Once they're in place, the bolts are difficult to get to. It took me a solid day to install them (Saturday day afternoon and Sunday morning). Proud of my handiwork, I couldn't wait to get my car to the shop so they could cut and weld the existing off road x-pipe to mate to these headers. $250 and 2 hours later, it was done! They started the car, and I was grinning ear to ear. When I pulled the car off the lift I noticed it...a huge exhaust leak. The mechanics discovered the leak was coming from the rearmost primary on the passenger side. I figured I forgot to tighten a header bolt, so the next morning I was under the car again with the starter removed. I attempted to further tighten the bolt to no avail. It was tight. And then it dawned on me: the flange was bent. Hours wasted and hundreds spent on a subpar product. My only option now will be to remove the header, and have a shop fix the poorly constructed flange. To add insult to injury, I'm now getting horrible gas mileage, as the entire bank is running rich. I am hugely disappointed with this product, and I cannot recommend Mac to anyone.

  jst2411

  Year: 2006 Submodel: GT

  Helpful (2) Thanks for your input!

  • Performance Gain 4

    4

  • Fit 1

    1
• 1/5

  February 17, 2018

  warp

  Mouth of headers warp. National speed couldn't fix them so sent them back. American muscle was awesome and took them back hassle free. Definitely do business with this guys.

  Jack

  Year: 2008 Submodel: GT500

  Helpful (2) Thanks for your input!

  • Performance Gain 1

    1

  • Fit 1

    1
• 1/5

  Installation Time: Weekend

  September 26, 2017

  Not worth it

  Fitment was not very good at all, had to shim the engine so they didn't touch the steering shaft and it's still hitting the frame. Save your money and buy a higher quality set of Longtubes

  CharlesF

  Year: 2005 Submodel: GT

  Helpful (2) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 1

    1
• 5/5

  Installation Time: Afternoon

  June 30, 2017

  Headers

  Really great headers but came in contact with the steering linkage so a minor bent was needed

  Mg

  Year: 2007 Submodel: GT

  Helpful (1) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 5

    5
• 5/5

  Installation Time: Full Day

  June 07, 2017

  Way loud

  Like the other reviews say, almost all headers will improve on performance and exhaust note. The prochamber, for was a bit too quiet, so I used my old Xpipe and had to customize it to get a perfect fit. Now it ridiculous loud. But only when you get on it. Way better sound at idle too.

  MannyCs197

  Year: 2007 Submodel: GT

  Helpful (1) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 5

    5
• 1/5

  March 04, 2017

  Mac long tubes problems!

  Very disappointed in the fit and finish first set the flanges were bent so badly couldn't get them to stop leaking. Second set header rested on frame and on top of lower control arm. As a result I had a terrible vibration through out the car. Thankfully AM was very helpful in resolving my problems by helping me pick a different brand header!

  EricC

  Year: 2005 Submodel: GT

  Helpful (6) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 5

    5
• 5/5

  Installation Time: Afternoon

  April 27, 2016

  Awesome old school upgrade

  These headers were a breeze to install. They sound great and the performance is noticeable when paired with a tuner and O/R mid pipe. Because of the style of the hearders, my saggy stock motor mounts caused the driverside to hit the steering shaft. After some Polly motor mounts were on, there were no more clearance issues. I would suggest getting the mounts at the same time and installing them while your under there. It is easiet to install them while the stock manifolds are off and before the new long tubes are on.

  05stangr

  Year: 2005 Submodel: GT

  Helpful (3) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Full Day

  April 18, 2016

  MAC Long tubes!

  First id like to say these long tubes were a pain to get in my 07 Shelby GT the drivers side header rubbed against the steering column for a while then got the header pipe rubbing against it adjusted. I defiantly got more power than expected and after I paired these with flow master super 10s its defiantly the loudest car in the county (:

  chewy

  Year: 2007 Submodel: Other

  Helpful (3) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 4

    4

  • Bang for your Buck 5

    5
• 4/5

  Installation Time: Afternoon

  May 31, 2015

  good for the price

  good deal compared to all the stainless $1000. ones. easy install if you take the motor mount brackets out, only problem was it jambed into the steering shaft, had to dent the header slightly and shim the motor mount a bit, then it was all good, noticed a little power increase. I would of bought kooks if I had the cash, but these are worth the $$$

  ken

  Year: 2007 Submodel: GT lynn ma

  Helpful (4) Thanks for your input!

  • Performance Gain 4

    4

  • Fit 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Full Day

  October 17, 2014

  CRAZY LOUD!!

  These headers are the best bang for the buck out there. And IMO they are a lot better then those expensive ones. If you are thinking about getting these for your stang, do it and you won't regret it. The sound and finish off the product is outstanding. Even though all my neighbors hate me,I would buy these headers 100x over.

  InezH06

  Year: 2006 Submodel: GT San Antonio, TX, USA

  Helpful (4) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Full Day

  July 20, 2014

  LOOK's , sounds & feel........

  In a nut shell, overall a very strong 4.5 out of 5. Fit's directly with no struggle . They look sexy , yet strong . The sound...." awsome" .... Great rough , raw sound... Starts deep and smooth , as you open up the throttle , you can hear that rough raw tone, almost angry, very aggressive. I have these bad boy's running straight through to a Bassanni X pipe and Bassanni axle back system. Sounds very distinct ,original , haven't herd a Pony with this sound yet . I guess it's the exhaust combo I have on my 06 GT . Very happy , & strongly recommend !!!!

  jorgecen

  Year: 2006 Submodel: GT Brooklyn, NY, USA

  Helpful (3) Thanks for your input!

  • Performance Gain 4

    4

  • Fit 5

    5

  • Bang for your Buck 5

    5
• 4/5

  Installation Time: Shop Install

  Installation Cost: $100-$250

  July 20, 2014

  Mac Longtubes

  They look good under the hood... they are one of the few brands with the 1 7/8 primaries ... good bang for the buck ... i had some 255 wide rear tires couldn't hold traction in 1st 2nd and hard chirp in the 3rd... got 275s now much better.. great quality to me.. little bit of a tight fit by driver side steering components.... but all in all good buy!!

  1withabullitt

  Year: 2008 Submodel: Bullitt Tulsa, OK, USA

  Helpful (3) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Shop Install

  Installation Cost: $250-$500

  July 18, 2014

  Amazing sound and performance!

  I had a shop install these headers and it took them two days but as soon as I turned the car on I could immediately hear tand feel an amazing improvement, my cars amazingly louder and pulls a lot more than before. Great product

  O8Stang

  Year: 2008 Submodel: GT Fort Worth, TX, USA

  Helpful (3) Thanks for your input!

  • Performance Gain 4

    4

  • Fit 5

    5

  • Bang for your Buck 4

    4
• 5/5

  Installation Time: Shop Install

  Installation Cost: $250-$500

  May 06, 2014

  Mac lives true to the rumors.

  These long tubes (off road) from Mac added about 35 RWHP after the dyno tune on my '10 GT. Previous modifications were; Roush CAI, Ford Racing intake manifold, Ford Racing 62mm throttle body, Ford Racing ported cylinder heads, Ford Racing hot rod camshafts, and Steeda under drive pulleys. Aside from the power gain, these long tubes sound low and throaty. I have the Mac pro chamber off road midpipe and couldn't be happier! I get a lot of compliments and questions on the exhaust set up. The shop owner even had a big grin on his face when he started it up for me when I was picking it up. The only slight negative I have so far is that the driver side header rubs slightly on the steering shaft when making hard right turns. It's not bad, just noticeable through a small vibration in the steering wheel. I think it's more of an issue in space rather than a design flaw. I've heard of MUCH more expensive brands doing the same thing on these cars. I guess something you have to live with if you want this modification. All in all, I'm in love with my car all over again. I wouldn't have done anything differently with it if given the option!

  Brian811

  Year: 2010 Submodel: GT Copperas Cove, TX, USA

  Helpful (3) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Afternoon

  August 15, 2013

  LOUD!!!

  Do not plan on sneaking around with these headers installed. Great performance gains, you can easily feel the improvement after bolting on.

  08S19746LV8

  Year: 2008 Submodel: GT Columbia, SC, USA

  Helpful (4) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 4

    4

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Full Day

  April 19, 2013

  Sounds angry!

  I will start by saying that this isn't something you want to do yourself if you don't have a garage full of tools and a lift. Luckily I had all that and it still took 7 hours. Real tight fit and I had to do a pretty good tear down of the undercarriage to fit them up, but when the job was done all I could do was grin. These headers paired with the prochamber are unbeatable. Sounds aggressive and gives you a very noticeable torque gain. Second gear just got more fun. Would definitely recommend.

  Marcello

  Year: 2007 Submodel: GT Kansas City, MO, USA

  Helpful (5) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 4

    4

  • Bang for your Buck 5

    5
• 2/5

  Installation Time: Full Day

  December 22, 2012

  Not worth it.

  The fitment was okay,and the quality was what I expected for the price. Not bad but definitely not the best. Sound wise it's just not there. I was looking for a deep low tone so I coupled these headers with the Prochamber and Mac a/b. I have no complaints from the mid pipe back! These headers give off a tin can sound that is worth avoiding them all together. Performance gains are moderate at best, and after this trail and error I just can't see why somebody wouldn't just save up a little more scratch and go with a stainless or ceramic coated header! AM was Awesome as always! I'll be back to perfect my setup.

  Rearwheelheaven05

  Year: 2005 Submodel: GT Houston, tx

  Helpful (4) Thanks for your input!

  • Response from AmericanMuscle

    Installing these Long Tubes and the mid-pipe, you definitely should be feeling the performance gains. We highly recommend getting a custom tune so that you can feel the full potential of these headers. If you have any questions about tunes, please give our Bama Specialists a call!

    Lisa, Customer Care
    

  • Performance Gain 2

    2

  • Fit 3

    3

  • Bang for your Buck 2

    2
• 5/5

  Installation Time: Full Day

  December 09, 2012

  My headers

  Awesome headers, everyone loves them, I can now feel my car breath like a beast.

  David33

  Year: 2007 Submodel: GT Mercedes, TX, USA

  Helpful (5) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 5

    5

  • Bang for your Buck 5

    5
• 5/5

  Installation Time: Full Day

  November 10, 2012

  Seems like a new car

  These headers have transformed my car it feels like its in a another category and another level, really opened up my car

  Headsmash

  Year: 2005 Submodel: GT Alabama, USA

  Helpful (4) Thanks for your input!

  • Performance Gain 5

    5

  • Fit 4

    4

  • Bang for your Buck 5

    5