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MAC Off-road Pro Chamber Mid Pipe (05-10 GT w/ Long Tube Headers)

AmericanMuscle no longer carries the MAC Off-road Pro Chamber Mid Pipe (05-10 GT w/ Long Tube Headers). Please check out 2005-2009 Mustang H-Pipes for an updated selection.

Features & Details

  • Improves Exhaust Flow for More Power
  • Unique Pro Chamber Crossover Design
  • For Off-Road, Track Use
  • 2.5" Mandrel-Bent Stainless Steel Tubing
  • Fits 05-10 GT Mustangs w/ MAC Long Tube Headers
Increase Exhaust Flow. Get rid of those power robbing factory catalytic converters and uncork your Mustangs hidden power with a MAC Performance Shorty Off-road Mid-Pipe. Featuring the exclusive Pro Chamber style crossover and free-flowing mandrel-bent tubing, this high performance shorty Mid Pipe in combination with MAC Performance Long Tube Headers will dramatically improve exhaust flow for more horsepower and torque.

Aggressive Muscle Car Rumble. This free flowing MAC off-road Mid Pipe not only increases the horsepower and torque of your Mustang, but with its unique Pro Chamber cross over design it adds a more aggressive muscle car rumble to the sound of your exhaust, that the standard H-Pipe just can't match.

High Quality Construction. Constructed from durable 2.5" diameter stainless steel tubing, this MAC Performance shorty mid pipe is CNC mandrel bent to ensure maximum exhaust flow, so there are no kinks to rob you of power.

Application. This MAC Performance Pro Chamber Off-road Shorty Mid-pipe is designed as a direct bolt-on for the 2005-2010 4.6L Mustangs, including the GT and Bullitt with MAC Performance Long Tube Headers installed. Intended for off-road, track use only, does not include catalytic converters.

Fitment: 2005 2006 2007 2008 2009 2010 Details

MPN# PC4605

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Mid-Pipe
  • (2) Down Pipes
  • (2) Clamps
Installation Info
Tech Specs
Mid Pipe Specifications
Style Mid Pipe: Shorty Type Headers Required: MAC Long Tube
Piping Material: Stainless Steel Piping Size: 2.5"
Catalytic Converter: "No" - For off-road use only Fitment: 2005-2010 GT, Bullitt
Will it fit my Mustang?

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      Questions & Answers (8)

      5 Top Rated Questions

      Is These More Of An H Pipe Of X Pipe?

      • The MAC Off-road Pro Chamber Mid Pipe functions more like a H-pipe.

      Helpful (0)

      Excuse my idiocy in my last question, I asked on the wrong pro chamber listing. However, will this mate up to the kooks longtubes? I've read a few places that the kooks longtubes are sometimes classified as mid-length tubes. Thanks again for the info.

      • The MAC Off-road Pro Chamber Mid Pipe will only match up to MAC long tube headers. The Kooks long tubes would require a Kooks Mid pipe.

      Helpful (0)

      Can you attach the Pypes High Flow Ceramic Catalytic Converter Kit to this mid pipe?

      • The Pypes high flow Ceramic catalytic converters will be able to attach to the MAC off-road Pro Chamber mid-pipe.

      Helpful (0)

      I have an SLP loudmouth axle back installed already. Will this mount up ok or do I need something else first?

      • The MAC Off-road Pro Chamber Mid Pipe requires MAC Long tube headers for installation.

      Helpful (0)

      What goes between this part the the the mufflers? Please excuse my ignorance. I'm a little confused with the following.. I already own the MAC axle back mufflers which are connected to my stock exhaust, and I want to know what will I need if I decided to get MAC LT headers and this pro chamber mid-pipe, will I reuse some of my stock exhaust to connect the mufflers to the mid-pipe? Or will I need to get a new part? Because it doesn't seem to me like the mid-pipe reaches the axle-backs. If I'm mistaken please let me know. Any help is appreciated. Thanks.

      • If you buy mac longtubes and this prochamber, they will replace your factory exhaust manifolds, and factory catted h-pipe. You will be able to reuse your over-axle exhaust pipes which will connect your prochamber to your mac axlebacks in the rear o the car.

      Helpful (0)
      Post Your Question
      3 More Questions
      JBA longtubes? Hey guys, i was wondering if this would fit on the JBA longtubes? thanks 1 answer
      Will this fit my 2010 GT? 1 answer
      Will this pass emissions/inspection Im pretty sure there is no way this will pass emissions or inspection, how much power will be lost if you used long tubes with a cat setup? 2 answers

        Customer Reviews (13) Write a Review

        Overall Rating 4.5

        out of 5 stars

        Installation Time:Afternoon

        Installation Cost:$250-$500

        • Loudness / Volume 4.384615 4.4
        • Exhaust Note 4.384615 4.4
        • Fit & Finish 4.461538 4.5
        • Bang For Your Buck 4.076923 4.1

        • 1/5

          March 17, 2018


          Bought long tube headers and prochamberfor 2008 saleen RF sc , header were warped so bad unable to fix. American muscle was awesome and excepted return no problem, won't buy mac again sticking with stainless works


          Year: 2008 Submodel: GT

          Helpful (5)

        • 5/5

          June 01, 2017


          Awesome design looks good and give an awesome sound also


          Year: 2006 Submodel: GT

          Helpful (5)

        • 5/5

          Installation Time: Afternoon

          April 29, 2016


          Great sound more power when I added the Mac Pro chamber mid pip to the Mac long tube headers


          Year: 2007 Submodel: GT

          Helpful (7)

        • 5/5

          Installation Time: Full Day

          July 17, 2015

          Easy installatipn

          The off road h pipe was easy to install using lift. Installed along with Mac long tube headers and the car sounds fantastic. Deep throaty rumble at idle and really gets loud when you hit the gas. When cruising around 3000 rpm interior noise is not bad at all. Highly recommend this product


          Year: 2007 Submodel: GT Waterford, NY

          Helpful (6)

        • 5/5

          Installation Time: Less than 1 Hour

          July 18, 2014

          Deep tone!

          The sound from the prochamber is amazing! Deep tone with no raspiness....almost sounds like an old 2v mustang. Paired with my mac longtube headers and borla stingers, you get a really aggressive sound, but smooth and not obnoxiously loud....that's what the electric cutouts are for!!!


          Year: 2007 Submodel: GT Maryland

          Helpful (7)

        • 5/5

          Installation Time: Afternoon

          August 15, 2013

          Awesome sound

          Almost sounds like the combination of an x-pipe and an h-pipe to me. I recommend this product.


          Year: 2008 Submodel: GT Columbia, SC, USA

          Helpful (5)

        • 4/5

          Installation Time: Afternoon

          July 01, 2013

          pro chamber quiet

          The overall fit and finish are great. It tucked up against the underneath of the car excellent. The tone of the pro chamber is in my opinion very mild. You would swear it has high flow cats on it. I run off-road style. If you are expecting volume levels like a h pipe or x pipe this isn't the one for you. Like I said its a little quieter but it has a sweet sound between shifts at about 5 grand


          Year: 2006 Submodel: GT Pottsville, PA, USA

          Helpful (6)

        • 5/5

          Installation Time: Afternoon

          March 22, 2013

          Great !

          Great fitment and sound. I have an 08 shelby gt and this midpipe brought the shelby sound right out. Great product highly recommend.


          Year: 2008 Submodel: GT Buffalo, NY, USA

          Helpful (6)

        • 5/5

          Installation Time: Afternoon

          January 18, 2013

          Best Sounding Mid-Pipe For the S197

          I love my Prochamber. Hands down the best sounding mid-pipe for the 3 valve. After installing the Mac Long Tube headers, this is a breeze. Slides right on and gives you the adjustment with the legs to make it fit perfect for you. Stainless steel is just another plus going for this. The sound of a full Mac exhaust is amazing.


          Year: 2006 Submodel: GT Evansville, IN, USA

          Helpful (5)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $250-$500

          December 22, 2012

          Great Product.

          I bought this along with MAC long tube headers and ended up welding in magnaflow high-flow cats to the H-pipe to stay legal. A local shop installed the long tube headers, welded in the high-flow cats, and the MAC prochamber and had no issues installing any of the products. The exhaust was finished off with borla stingers axle backs. The car sounds great and it is a very agressive sounding car. It has a low rumble at idle, not too much louder than stock but certainly lower/deeper and meaner sounding. It also revs great and has a great muscle car sound during acceleration, which is certainly louder than stock. From what I have read, it would be louder without the magnaflow cats but that the sound would be more refined and not as crackly. I can't speak to what it sounds like without the magnaflows but I love the way it sounds the way it is set up. Would certainly recommend this product.


          Year: 2007 Submodel: GT

          Helpful (6)

        • 5/5

          Installation Time: Afternoon

          August 25, 2012


          Paired this with MAC long tubes and Magnaflow axelbacks and this puppy really screams when I jump on it. Gotta love that idling rumble as well. It sounds great! Best sound on the street wherever I go, the local mustang group is jealous, as well.


          Year: 2007 Submodel: Other Pensacola, FL, USA

          Helpful (6)

        • 4/5

          Installation Time: Afternoon

          July 27, 2012

          Overall good product

          I love the way this piece sounds, the pro chamber seems to give a much deeper and more aggressive sound then the rest of the mid pipe style's (i.e. x-pipe or h-pipe). Just like any aftermarket stuff it was a little bit of a hassle to install, nothing ever fits just right, but the install took roughly 3 hours including the axle back exhaust. Great product, would recommend to anyone


          Year: 2009 Submodel: GT Colorado, USA

          Helpful (5)

        • 5/5

          Installation Time: Shop Install

          December 08, 2011

          The Pro-chamber is great...

          I purchased the MAC long tube headers and off road prochamber, and also I bought the cat back Magna Pack Magno flow kits, now I have a great sounding GT, the parts all bolt on together great, would recommend this product for anyone. Shipping was great as well received the Prochamber in Two days. Everything was direct bolt replacement, no problems at all. I didn't install the parts but I was at the shop while it was being installed, and it took just about 4 to 5 hours to get the entire system put on.


          Year: 2006 Submodel: GT Corbin, KY

          Helpful (6)

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