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MAC Off-road Pro Chamber Mid Pipe (05-09 GT)

Market Price $546.20 You Save 13% ($71.25)
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$474.95

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  • Item 40013
  • MPN# PC2005

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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 05-09 GT Mustangs
    Increase Exhaust Flow. Get rid of those power robbing factory catalytic converters and uncork your Mustangs hidden power with a MAC Performance Off-road Mid-Pipe. Featuring their exclusive Pro Chamber style crossover and free-flowing mandrel-bent piping, this high performance Mid Pipe 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 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 Mid-pipe is designed as a direct bolt-on for the 2005-2009 4.6L Mustangs, including the GT and Bullitt with either aftermarket short tube headers or the factory manifolds installed. Intended for off-road, track use only, does not include catalytic converters.

    Fitment: 2005 2006 2007 2008 2009 Details

    What's in the Box
    • (1) Off-road Mid-pipe
    • (2) Down pipes
    • (2) Clamps
    Installation Info
    Tech Specs
    Mid Pipe Specifications
    Style Mid Pipe: Standard Type Headers Required: Shorty or Stock Manifolds
    Piping Material: Stainless Steel Piping Size: 2.5"
    Catalytic Converter: "No" - For off-road use only Fitment: 2005-2009 GT, Bullitt
    Will it fit my Mustang?

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    Questions & Answers (10)

    5 Top Rated Questions

    What can we do for the rear O2 sensors if we can't afford the tuner? The s197 doesn't have MIL eliminators right?

    • That's correct, there are no MIL eliminators for 05 or newer mustangs. Unfortunately, the only way to eliminate the check engine light from the rear O2 sensors is with a tuner.

    Helpful (0)

    Hi my axel back exhaust has a 2.75 in diameter will this still fit

    • Yes, this mid pipe will fit with your axle-back.

    Helpful (0)

    Hi would this go good with a borla axel-back exhaust

    • As long as your Borla axle-back exhaust has a piping size of 2.5" in diameter, this will work well with the exhaust to give you the muscle car sound that the H-pipes have.

    Helpful (0)

    Will the check engine light come on after installing this mid-pipe or no?

    • The MAC Off-road Pro Chamber Mid Pipe does not have catalytic converters, so it will produce a check engine light for catalyst below efficiency. A tuner with custom tunes capability can remove the check engine light, with the proper tune.

    Helpful (0)

    tune? just wondering if this would need a tune or not. I assume it would seeing as you are replacing the cats but just wondering

    • Yes you will need to get a tune since you will be going catless which will make your car throw a check engine light.

    Helpful (0)
    Post Your Question
    5 More Questions
    O2 Sensors When putting on these off road pipes will the O2 sensors throw a code due to the fact that there are no more CATs? 1 answer
    Will I need O2 sensor extensions? 1 answer
    pypes pype bomb Any One have it paired with pypes pype bomb axel backs? Like the sound? direct fit? 2 answers
    if i decide to get mac long tubes, will i have to buy a new h pipe or can i just cut it into a shorty pipe so it will fit the longtubes 1 answer
    DOES THIS INSTALL REQUIRE ANY WELDING? 3 answers

    Customer Reviews (19) Write a Review

    Overall Rating 4.2

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Loudness / Volume 4.529412 4.5
    • Exhaust Note 4.882353 4.9
    • Fit & Finish 3.529412 3.5
    • Bang For Your Buck 4.058824 4.1



    • 5/5

      Installation Time: Less than 1 Hour

      March 21, 2018

      More Torque less noise!

      This Mac pipe is awesome! It gave my car more torque and is quieter than the H pipe I took off. I’m not sure if that’s a good thing, but when I put on the series 40 Flowmasters than it sounded great.

      Cobra0473

      Year: 2007 Submodel: GT

      Helpful (2)

    • 1/5

      Installation Time: Full Day

      September 27, 2017

      Really bad fitment

      It just wouldn't fit properly as it was bent and twisted. As a result I ended up buying a different system as this one was so twisted it kept catching the road

      Tom

      Year: 2009 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 18, 2017

      Deep refined tone, reduce rasp.

      Chose the O/R Prochamber because i wanted a clean and refined exhaust note while retaining the power gains from removing the converters. This product absolutely delivers and is the only midpipe i would ever use on a modular motor mustang. If you want to cut down on any rasp or drone in your exhaust this is the midpipe you want. Paired with some mid mounted bullet style mufflers (Borla, Roush, SSS, Pypes etc.) you can achieve that smooth hollow sound the 2V and 4V motors are known for. Reused the factory H-pipe clamps as they seemed to be more robust than the supplied hardware. Takes a little trial and error to get these bolted to the headers with no leaks because of the factory studs. Those will need replaced or modified for a leak free fit. For that reason i recommend taking this to a REPUTABLE exhaust shop. I Highly recommend using this Midpipe with a good quality mid mounted muffler setup. You will forget all about the money you wasted trying axleback setups the second you fire it up!

      Charles

      Year: 2005 Submodel: GT

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      September 12, 2016

      MAC Off-road Pro Chamber Mid Pipe

      This is very well designed. However let me review..., the fit required some hand tools to get the down pipes to fit the mid-pipe. Channel locks, angle grinder, and a good bit of hits with a mallet...hmmm ok, 2 stars, but overall it is a great upgrade once in place. The Mustang sounds great, and I get complements all the time now. The added low end torque is a plus for street driving. Hard to tell how much it added overall, because they will hear me coming now. It's not too loud outside but louder in the cab for sure. Takes some getting used to, but I've knew what to expect. Definitely a positive improvement though. About 2 hours on jack stands with air tools. I love the sound, 5 stars. You can definitely hear the chamber but it doesn't sound hollow like fox's with Flowmasters. That tone is great, but it gets old if you drive the car everyday. This tone is low and smooth. No pop when throttle released. Nothing but smooth low rumble at idle but hit the gas and it roars. The engine sounds bigger and healthier. AmericanMuscle, thanks, but this sound is American muscle!!! Thanks!!!

      RacinJason

      Year: 2005 Submodel: GT

      Helpful (3)

    • 2/5

      September 07, 2016

      Junk

      Nothing seemed to fit. I bought this prochamber for my shorty headers and the o2 downpipes would not slide into the chamber! Eventually, with two pipe expanders and a few days later I made them fit better, but it's still not a great fit. On the plus side, it is a nice sounding exhaust, and I notice a dramatic change in performance. Save yourself a headache, get a brand you've heard good about.

      DJ

      Year: 2006 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      January 27, 2016

      BEST MID-PIPE EVER!!!

      Off-Road Mac Prochamber, Flowmaster American Thunder Classic 40 Series Axle-Back. This is the best mid pipe EVER!!! I finally found the perfect sound, after trying o/r x pipe, o/r h pipe, resonators, nothing worked and it sounded horrible! So much rasp and nasty sound! The Mac Prochamber saved me, I'm in love with the sound, there's no rasp at 3k rpm when cruising like metal rocks jumping around in my mufflers. Just an even aggressive deep tone all the way through. I'M IN LOVE! MAC PROCHAMBER IS THE BEST THING THAT'S EVER HAPPENED TO ME AND I'M IN LOVE WITH THE SOUND. I've spend thousands of dollar switching exhausts, SLP loudmouths, Borla ATAK, Magnapacks, Flowmaster, they all sound great with Mac Prochamber, because the problem was always the o/r X pipe or o/r H pipe, and I thought it was the mufflers. As far as installation, the down pipes and the clamps were trash. They didn't fit so shop had to cut and weld a new piece on the driver side down pipe where it curves and the clamps were so small that the exhaust was leaking. $180 later I just had everything welded so I never have to worry about it. IF YOU BUY THIS MAKE SURE YOU TAKE IT TO A MUFFLER SHOP AND EXPECT SOME CUTTING AND WELDING, BUT NOTHING MAJOR. ALSO MUST GET IT WITHOUT CATALYTIC CONVERTERS BECAUSE IT'S VERY QUIET WITH CATS, BUT WITHOUT THEM IT'S THE BEST SOUND IN THE WORLD JUST LOUD ENOUGH DEEP ENOUGH, AND SMOOTH EVEN TONE WITH ABSOLUTELY NO RASP OR NASTY SOUNDS!!! I RECOMMEND THIS 100 FOR ALL MODEL MUSTANGS IT'S THE BEST MID PIPE EVER!!!!

      DShelby500

      Year: 2009 Submodel: GT500 Fort Lauderdale, FL

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      September 06, 2015

      Awesome Sound

      Wow! this mid pipe complimented my Pypes Violator. I have friends that went with Headers and mid pipe. They are impressed with my exhaust sound It's as good if not better then the header set up. You can hear the combustion from the cylinders has they fire same effect you get with long tubes. You wont be disappointed if you go with the Mac Pro Chamber.

      Max

      Year: 2006 Submodel: GT Ga

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      May 26, 2015

      great choice over headers.

      I decided on this over headers, and I'm glad I did. The sound is amazing. If you want a smooth growl, just feather the pedal, if you want loud, hit it. It feels like you can determine how loud you want it by the way you drive. Cruising around 65-70mph, it's awesome. FYI, 1999-2004 mil eliminators DO fit.

      GT

      Year: 2008 Submodel: GT Easton, Md.

      Helpful (5)

    • 4/5

      Installation Time: Full Day

      February 06, 2015

      Good as long as it fits

      All in all good product in the end, getting it on was not easy the hangers sat too far apart and the driver side where it bolts to the headers wasn't the right size I had the bend the bolts from the headers closer together so I could tighten it down without a major exahaust leak if it were made better it'd had been an easy 1-2 hour job but after about 10 hours I got it on well enough, well worth it as long as you don't run into the same problem

      07CaliSpecial

      Year: 2007 Submodel: GT

      Helpful (5)

    • 2/5

      Installation Time: Afternoon

      August 21, 2014

      Ehhh

      I've had a pro chamber before on my old mustang and it was a perfect fit and had zero problems. However whoever made this one must have been having a very off day. The passenger side o2 sensor was welded in the wrong place putting it directly in front of the stud. Both pipes were very crooked and had to be heated and bent to get it to fit. And the hangers are about 1.5 inches too far apart, all this making it much more difficult to install than it ever should be. I've been working on cars 12+ years and have never had such difficulty just swapping an exhaust pipe, after all the trouble I got it to work though and it does sound great but I hope no one else has this problem.

      Justin454

      Year: 2007 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      July 10, 2013

      Happy Camper!

      After long debating whether or not to buy the off road pro chamber I finally did and installed it at my buddy's shop. When I went to pick the cat up after work I asked him if indeed it was louder, and the expression on his face was priceless. The sound is awesome! I only had the MAC axlebacks previous to the install and it sounded nice already, but with the off-road prochamber, it's a different beast. The first day driving it I had two different people asking me about it and I always catch people staring or turning their heads. I love it.

      vaporstng

      Year: 2008 Submodel: GT anaheim, california

      Helpful (5)

    • 4/5

      Installation Time: Afternoon

      May 28, 2013

      Great Muscle car sound!

      Great Mid pipe, has a nice old school muscle car sound. Hardest part of the install is taking the factory H and cats off. Off Road is the way to go, not too loud at idle or cruising but when you give it some gas it sounds MEAN!!!

      Sully08GT

      Year: 2008 Submodel: GT Delaware

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      March 24, 2013

      Loud Note Indeed!

      This is a solid product that was installed in tandem with the Roush Extreme Performance Catback. This thing roars INCREDIBLY LOUD! I wanted to go pro chamber because I was told this rumbles even lower than an h-pipe soundwise, and I wanted that stereotypical muscle car sound. In actuality, it's not as low as I had thought it would be...perhaps it's because this is an off-road pipe. However, that's not to say I don't approve of the volume and overall sound. With the new exhaust, this mid-pipe produces no drone and no other major issues. Just be ready for overall fatigue from the volume if taking looooong trips. This pipe definitely turns heads and I'm very happy not only with the purchase, but the help I received from Tina at AM, who talked me through the pros and cons of the mid-pipes

      Rooce

      Year: 2008 Submodel: GT Fort Myers, FL, USA

      Helpful (6)

    • 3/5

      Installation Time: Full Day

      September 11, 2012

      Problems

      I got this mid pipe in last night. When I opened it the mid pipe was just laying loose in the box no bubble wrap nothing. It was free too just be clanging around getting dented scratched or smashed. I know this is stainless steel and would be hard to bend but I used to work for ups and I know how they handle there stuff. So this morning I went to install the exhaust factory exhaust came off easy. I took the 2 02 sensors off the right side and one off the other as I put the sensors on the new mid pipe the first went on fine but the 2nd one went in about 3/4 of the way and stopped ( I did not cross thread there was no tension when screwing them in the 1st 3/4 of the way). So I tried backing it out it wouldn't budge! Finally after some good torque it broke free and slowing unscrewed when I got it out the people that had wielding in everything left a bead in the threads which completely trashing the threads on my o2 sensor. I had to buy a new o2 sensor (50$) also had to buy a tool to re thread the o2 hole (7$). Very very frustrating! Also the bends in the piping were not real smooth you could tell we're they had to get a couple bites. I had heard great things on this mid pipe but was kind of dissapointed. On a good note it does sound great with my flow master 40 series axle backs. I could be a rare case but just a fore warning make sure you check the o2 threads before putting your sensor on. Besides the product I have had a few prior questions and AM has had great customer service and the package came on time ( although the bad packaging)

      Chapman2787

      Year: 2008 Submodel: GT Fayetteville, AR, USA

      Helpful (5)

    • 5/5

      Installation Time: Afternoon

      July 27, 2012

      Awrsome sounding machine

      Product was easy to install and sounds great. Fast shipping, honestly the best customer service I have ever had. Will be coming back to purchase anything else that I need/want for my baby.

      Skizzle57

      Year: 2007 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      July 03, 2012

      AWESOME H-PIPE

      The Mac Pro-Chamber is a an awesome mid pipe. The sound is just what I was looking for, deeper, more aggressive, but not to loud. It sounds like an old school muscle car, even with the stock mufflers. The quality of the pipe is as good if not better than expected. As for installation, good tools and a little experience are a must. A lift is nice and makes the job a whole lot easier. The check engine light did come on after driving for a while. I understand that a tuner will solve this problem. I can't wait to get my tuner / rear end gear combo along with a CAI to finish off my project. P.S. I placed my order after 5pm on a Thursday and received my pipe on Saturday. Great job American Muscle

      BULLITT38

      Year: 2006 Submodel: GT NEWPORT NEWS VA

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      May 23, 2012

      Excellent Mid Pipe

      Very pleased with the sound of the O/R Prochamber... Not overwhelming but very nice indeed! Drone between 50 - 70 mph is not overwhelming either... But it's actually nice to be able to make a little bit of noise ONLY if you want to by pushing the "pedal to the metal!". I have the Prochamber paired up with Bassani Axleback mufflers and so far my friends who also own Mustangs love the sound. Again, I am very pleased with the Prochamber/Bassani setup but I have no doubts that this mid pipe will sound great with most other cat back or axleback systems. This pipe is worth it. BUY IT!!!

      Miguel

      Year: 2007 Submodel: GT Cocoa, FL

      Helpful (5)

    • 5/5

      Installation Time: Afternoon

      October 01, 2011

      mean sound

      I installed this offroad h pipe on my 06 saleen supercharged to give my car a meaner sound. And it worked. Sounds great. Install was pretty easy, except for hard to get at o2 sensor. Otherwise it was a piece of cake. When I give her some gas it sounds pretty darn mean. Using it with saleen exhaust (has magnaflow mufflers). Now they can hear me coming.

      Don888

      Year: 2006 Submodel: Other forest lake ,mn

      Helpful (4)

    • 5/5

      August 08, 2011

      Off-road Mac Prochamber

      The fit and finish of this piece is far superior to the Magnaflow catted X-pipe I've had on my car before. With my Corsa mufflers it gives it a unique clean sound, unlike every other Mustang out there with Flowmasters. I would definitely recommened this to anyone looking to be different and get a well made mid-pipe.

      Eric Slade

      Year: 2007 Submodel: GT

      Helpful (10)

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