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

Market Price $512.85 You Save 13% ($66.90)
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  • Item 40041
  • MPN# PC4605

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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

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?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09, 10

Requires MAC Performance Long Tube Headers for installation

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Most Helpful Reviews


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

Helpful (1)

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, ...

Read More
Helpful (1)

Overall Rating 4.8 out of 5 stars
Read All 11 Reviews

Customer Photos (1) Submit Your Photo

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4 Questions / 5 Answers

Ask a Question

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.


Helpful (0)
  • 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.


JBA longtubes? Hey guys, i was wondering if this would fit on the JBA longtubes? thanks


Helpful (0)
  • The MAC Off-road Pro Chamber Mid Pipe is specifically designed to work with their long tube headers only, and they will not fit with another manufactures headers.


Will this fit my 2010 GT?


Helpful (0)
  • Yes - this shorty mid-pipe will fit your 2010 GT when combined with the MAC Long Tube Headers.


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?


Helpful (0)
  • No, being an off road pipe it does not have catalytic converters. So if you live in a stat that does emmisions testing. You will fail. Also you will get a P0420 code as a cel if you dont have a tune.


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Customer Reviews (11) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Afternoon

Installation Cost:$250-$500

  • Loudness / Volume 4.363636 4.4
  • Exhaust Note 4.454545 4.5
  • Fit & Finish 4.727273 4.7
  • Bang For Your Buck 4 4

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (1)

  • 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 (0)

  • 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 (0)

  • 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 (0)

  • 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 (0)

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