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MAC 1-5/8-Inch Long Tube Headers; Ceramic (99-04 Cobra, Mach 1)

Item 40063
AmericanMuscle no longer carries the MAC 1-5/8-Inch Long Tube Headers; Ceramic (99-04 Cobra, Mach 1). Please check out Ford Mustang Exhaust Headers for an updated selection.
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    Review & Installation Video

    Product Information

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


    • Increases of Up to 18 RWHP
    • Long Tube Header Design
    • Free Flowing Mandrel-Bent Tubing
    • Polished Ceramic Coated Finish
    • For Use with Manual and Automatic Transmissions
    • Fits 1999-2004 SVT Cobra and 2003-2004 Mach 1 Mustangs


    More Horsepower And Torque. Replace those restrictive stock manifolds with a set of MAC Long Tube Ceramic Headers to improve exhaust flow and increase your Mustang's horsepower and torque. Increases of up to 18 RWHP have been seen when installed with a matching MAC shorty Mid Pipe (see drop down option above).

    Ceramic Coating. These Long Tube Headers are completed in MAC's Polished Ceramic Coating that not only looks great, but reduce under hood temperatures to help increase horsepower and extend the life of the headers. Ceramic Coated headers will long out last both chrome plated and polished headers.

    High Quality Construction. Constructed from 1-5/8" mandrel bent 16 Gauge Steel tubing so there are no kinks to rob you of power, these MAC Performance Long Tube Headers feature 2-1/2" True Fit Collectors that eliminate the need for gaskets which are prone to leak and blow out. These headers are then completed in a ceramic coated finish for good looks and a durable long life.

    Recommended Upgrade.
    To realize the full power potential that these Long Tube Headers have to offer, AmericanMuscle recommends a custom tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

    These Mac long tube headers are designed to fit the 1999-2004 SVT Cobra and 2003-2004 Mach 1 Mustangs with either a manual or automatic transmission. MAC Performance recommends using a MAC shorty Mid Pipe for the best performance gains.

    Technical Note. This MAC Performance product is not legal for use in emission restrictive states.

    Fitment: Details

    CA Residents: WARNING: Cancer and Reproductive Harm -


    Customer Reviews (25)

    Write a Review

    Ratings Summary

    4.9 out of 5 overall rating from 25 customers

    Installation Time: Full Day

    Installation Cost: 0-$100

    • June 15, 2019

      4 2003 Cobra - term8 Installation Time: Full Day

      great header

      one of best bang for buck long tubes around for 03/04 cobras

      Helpful (0)
    • December 09, 2018

      5 2001 Cobra - 2001cobra Installation Time: Full Day


      Just what I expected really happy with the quality of these headers sound great with pro chamber cad delete and magnaflow cat backs couldn't be happier

      Helpful (2)
    • September 19, 2018

      5 2004 Mach 1 - Monstermach Installation Time: Weekend

      Second header install

      Same install as all the others. I did arh on my cobra and these on my Mach.. only complaint was egr is off.. I had to modify mine to work. But that’s the name of the game

      Helpful (2)
    • July 21, 2018

      4 2003 Mach 1 - TimothyN Installation Time: Weekend

      Mac Headers

      These headers are great for the price. Pros: Fit VERY nicely underneath. I've heard rumors of people being able to drop their tranny with these still attached and I think with a little struggle its possible. A noticeable difference in hp between stock manifold w/ bbk O/R x compared to Mac headers with mac O/R X pipe. Cons: Headers came still un finished. Had to have a friend finish a weld at not one but two of the ports. The EGR Tube is PRETTY far off. I suggest blocking off but I didn't. Other than that design is great quality is ok. Instructions didn't include dropping K member but I did and install did take one whole weekend.

      Helpful (3)
    • May 09, 2018

      5 2003 Mach 1 - MatthewH

      What a ride.

      While I did not buy these from AM, I wanted to write a review because they're a very popular company that many people use. First off, the installation is definitely a PITA. Even on a lift, its very tedious (not hard mind you, just annoying) and I can't give a true installation time because I redid the suspension on all 4 corners as well. Total was about 14 hours in one day because I ran into other problems as well lol. As far as the product, I couldn't be any happier. They fit great, perform great, and sound MEAN. I have these paired with a high flow catted x, and SLP LM1s. At idle it's quite tame (which I prefer) but as soon as you give it any gas it just screams. For anyone looking at headers, these are the absolute best way to go.

      Helpful (6)
    • January 30, 2018

      5 2003 Cobra - TimothyN Installation Time: Full Day

      Great Product!!

      Fitment was great!! This is a good bang for the buck header. Would recommend to anyone for there cobras!!

      Helpful (4)
    • December 21, 2017

      5 2004 Cobra - Shannon

      Oh ya!!

      My Cobra already sounded mean, but now it sounds menacing and intimidating. Well worth the time and effort.

      Helpful (7)
    • December 08, 2017

      5 2003 Cobra - Tyler502

      Mac Headers

      So far from what I can see in the box they look shiny but unfortunately they won’t be installed until after Christmas but I need this $10 off my next purchase for Bbk header gaskets because $40 is a lot of money

      Helpful (6)
    • September 28, 2017

      5 2003 Cobra - stangbot


      used these to replace a leaking stock set of headers. I love them and they fit very well. they bolted to the engine fine and allow clearances for the steering shaft. the Mac xpipe that you will also need was a good 1/4 inch off though. Not sure if it was the long tubes or the xpipe, but looked more like the xpipe wasn't welded within spec's. at any rate that is why i couldn't give 5 stars for fit. I'm running a kb sc with 18lb pulley and with these long tubes actually seeing only 14.5 lbs of boost, so these are free flowing and i highly recommend them. i bolted them up at the same time i removed the engine for other mods so i can not give an install time.

      Helpful (4)
    • July 16, 2017

      5 2004 Cobra - RobertG Installation Time: Less than 1 Hour

      Great headers!

      These headers were a perfect fit along with the Ford racing header gaskets, bolted them in with stage 8 bolts. They sound great with mac xpipe and Pype violator exhaust.

      Helpful (5)

    Questions & Answers (9 answers)

    5 Top Rated Questions

    Will these fit a Mach 1? I've seen these on multiple websites that say these will fit on Cobras and Mach 1's along with reviews stating the same. My question is if these are different.

    • They should bolt right up. You could double check with the manufacturer to be certain. The only difference I know of in the exhaust system of the two cars is behind the mid pipe.

    Helpful (1) Show 1 more answer

    what H pipe do you use with these headers

    • You will need to get a Mac mid-pipe for proper fitment.

    Helpful (0)

    Do these come with gaskets?

    • The MAC 1-5/8 in. Ceramic Long Tube Headers do not include new gaskets and will need to be purchased separately.

    Helpful (0)

    Do these have an egr port?

    • These headers will not have provisions for EGR.

    Helpful (0)

    Will these fit a 2003 svt cobra?

    • Yes, the MAC 1-5/8 in. Ceramic Long Tube Headers will fit an 03 Cobra.

    Helpful (0)
    Post Your Question
    4 More Questions
    After these are installed, would I be able to freely drop the transmission or do I have to remove the headers ever I ever need to do transmission work? 1 answer
    Will I be able to drop the transmission with these installed? 1 answer
    Would cats have to be removed? Would my cats need to be removed when installing Longtubes or can you still keep your cats? 1 answer
    Will this work with the MACH 1? And the SLP Mid X pipe? SLP does not make a set of longtubes for the MACH 1 :-( so i turned to the next best thing i just want to make sure this will fit the SLP (sectional) MID X PIPE that you can remove parts for fitment i.e. remove the down pipes to install the long tubes or just take the cats out for a swap .... just wanna make sure that i wont have like a HUGE gap or overlap .... any ideas or suggestions? 1 answer

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (1) Driver Side Header
    • (1) Passenger Side Header
    • (16) Header Bolts
    • (4) 7/16" Steel Studs
    • (4) 7/16" Locking Flange Nuts

    Tech Specs

    Header Specifications
    Header Type:Long Tube Finish :Ceramic
    Type Mid Pipe Required:ShortyFitment:1999-2004 SVT Cobra
    2003-2004 Mach 1

    Will It Fit My Mustang

    • Cobra - 99, 01, 03, 04
    • Mach 1 - 03, 04