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JBA After-Cat H-Pipe - 3 in. to 2.75 in. (11-14 GT)

AmericanMuscle no longer carries the JBA After-Cat H-Pipe - 3 in. to 2.75 in. (11-14 GT). Please check out 2010-2014 Mustang H-Pipes for an updated selection.
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AmericanMuscle no longer carries the JBA After-Cat H-Pipe - 3 in. to 2.75 in. (11-14 GT). Please check out 2010-2014 Mustang H-Pipes for an updated selection.

Features & Details

  • Improves Exhaust Flow for More Power
  • Classic Muscle Car Sound
  • Free Flowing Mandrel-Bent Stainless Steel
  • 3" to 2.75" Tubing
  • Smog Legal - When Reusing Your Stock Catalytic Converters
  • Off Road Use - When Using the Included 3" Cat Delete Downpipes
  • Fits 2011-2014 GT Mustangs
Improves Power. Add even more horsepower and torque to the rear wheels of your 5.0 coyote Mustang with a JBA After Cat H-Pipe. The JBA high flow H-Pipe significantly improves your GT's exhaust flow to increase overall performance. This JBA H-Pipe is designed to be used with JBA's shorty headers or the factory manifolds.

Muscle Car Rumble. This free flowing JBA Mid Pipe for your 2011-2013+ 5.0-powered GT not only increases power, but it also adds a deep muscle car rumble to the sound of your exhaust with its classic "H" crossover pipe design.

Street Or Off-road Use. The JBA GT H-Pipe bolts up directly behind the factory catalytic converters with no cutting required making your Mustang 100% smog-legal. Or you can install the included stainless steel "cat delete" downpipes for even more power making your h-pipe perfect for off-road use.

Quality Construction. The After Cat high-flow H pipe is made to last, using durable 3" stainless steel tubing that steps down to the factory 2.75" diameter. With its smooth, precise mandrel bents, there are no kinks to rob you of power.

Reusues Factory Cat-Back. This 3" to 2.75" JBA Mid Pipe can reuse the factory catback exhaust or an aftermarket catback exhaust system with a 2.75" pipe diameter.

Application. This JBA high flow After Cat H-Pipe is designed to fit the 2011-2014 GT with either the factory exhaust manifolds or aftermarket shorty style headers installed. Reuses the stock Catalytic Converters.
What's in the Box
  • (1) H-pipe
  • (2) down pipes
  • (4) Bolts
  • (4) Nuts
Installation Info
Tech Specs
Style Mid Pipe: Standard "H" Type Headers Required: Shorty or Stock Manifolds
Piping Material: Stainless Steel Piping Size: 3" to 2.75"
Catalytic Converter: Reuses stock Catalytic Converters Fitment: 2011-2014 GT Mustangs

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10 Questions / 8 Answers

Ask a Question

Will this fit with the LTH Over Axle Pipes (11-14 GT, GT500)?

ReeseG

  • Since this JBA after-cat H-pipe steps down from 3" to 2.75" and the LTH over axle pipes have a diameter of 2.75" they will work in conjunction with one another.

    KevinD92

Helpful (0)

How easy is it to switch between using the stock cats to the cat delete down pipes? Given that you have the tunes for each, would it be terribly difficult to switch between the two at will?

Christian

  • The remove and replace the the catalytic converter deletes with the stock catalytic converters with the JBA After-Cat H-Pipe would be fairly easy depending on experience, If the hardware is not rusty and you have the appropriate tools, the switch should take about an hour.

    AMJEFF

Helpful (0)

If I use the factory cats do I need a retune from sct?

Tony2012

  • Hi, This JBA After-Cat H-Pipe will not need a tune when using the stock catalytic converters, But if you use the Included 3" Cat Delete Downpipes you will need to get a BAMA tune.

    Chris J

Helpful (0)

Will this bolt up to the borla catback system for a 2014 GT without having to modify anything?

Dreamcarmustang

  • The JBA After-Cat H-Pipe - 3 in. to 2.75 in. (11-14 GT) will with in conjunction with the Borla cat back systems for a 2014 GT however with all of Borla exhausts, they will all come with an X-Pipe that you will need to replace.

    KevinD92

Helpful (0)

Will this fit magnaflow comp axlebacks? Thinking about getting these along with my magnaflow axlebacks will these fit perfectly?

TOoCool

  • Yes they should. I have the JBA Off/R H pipe with magnaflos in my car. The JBA H actually fit better then the catted Magnaflo H I have for emissions test.

    kwmiked04

Show 1 more answer Helpful (0)

Is a tune required if the delete pipes are used?

Azevedo

  • I believe it's not required, but it is HIGHLY recommended for 2 reasons: 1. your car fuel levels will be off since it will be trying to make up for the 2 o2 sensors it's not reading 2. This will throw a CEL, and the tune will be able to get rid of the CEL. A

    ezpotato

Show 1 more answer Helpful (0)

Customer Reviews (26) Write a Review

Overall Rating 4.5

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume 4.208333 4.2
  • Exhaust Note 4.583333 4.6
  • Fit & Finish 4.083333 4.1
  • Bang For Your Buck 4.5 4.5



  • 5/5

    June 03, 2017

    Deep Rumble...

    I have the JBA H Pipe and kept the stock cats just in case one of my vegan side pieces looks underneath my car... combined with the Roush axle backs makes a sweet sound that makes me feel sexy yet classy while driving. Not obnoxiously loud, just a deep rumble like listening to Morgan Freeman's voice sing that V8 baritone into the summer night... AM reps were awesome as usual and I had these fresh exhaust pipes professionally installed, no problems there. Highly recommended!

    KnightRider

    Year: 2012 Submodel: GT

    Helpful (2)

  • 4/5

    Installation Time: Afternoon

    March 17, 2017

    BANG for your buck

    This really wake the sound of your car up if you using the down pipes. When your just cruising the sound is low but when you get on it ....OMG , and I'm using roush axle. Had a little trouble with fitment with the h pipe halfs connecting to each other but other than that it's perfect

    Al

    Year: 2013 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    February 15, 2017

    More air more power (it') the law

    The hardest part of this install we're getting the 2 bolts loose the clamped the h pipe to the cat's Ford really played a trick on us with that hook up,after that it was all gravy,I'm a cali boy so I kept my cats,and it didn't matter i could feel the newborn power not a whole lot but i could feel it no doubt about it. I drove it like this for 2 days then I loaded the the bama tune to get the most from the extra my pony was breathing i haven't had a new tune in about 2yrs when I installed my jlt cai since then I've added gt500 ab bbk 85mm tb dss one peice ds aluminum, and 275/40/19 on all 4 Corners i told bama about these mods and the tune they sent me unleashed the beast !! A 2 hour install makes me want to go camaro hunting hearing the deep roar from the jba h pipe as I rip thru the gears is intoxicating

    mase

    Year: 2014 Submodel: GT

    Helpful (4)

  • 2/5

    Installation Time: Shop Install

    December 20, 2016

    Bad leaks

    Fitment is poor. I installed it myself with a cat delete and had some bad exhaust leaks where the downpipe meets the midpipe. After multiple attempts, I couldn't get the leak stopped, so I took it to a shop and they couldn't get it to stop leaking either. They recommended another shop they thought might be able to fix it, but I haven't taken it in yet. If I could do it over again, I would leave the stock midpipe in place and stick with my Borla Axleback. Sound is not bad, but it's not noticeable deeper in tone. Just much higher in volume. Hard to tell if it will sound much better when the leaks are finally fixed.

    Noah

    Year: 2011 Submodel: GT

    Helpful (3)

  • 5/5

    December 16, 2016

    Great deep rumble

    I installed the cat delete pipes with the JBA h pipes and ford racing sport axle back exhaust. These h pipes with cat delete really gives it a good loud muscle car sound especially when you get over 3k rpm. Everything fit fine during install and it only took about an hour. The hardest part was removing the passenger side cat. Overall, great product and very happy with sound, haven't turned my radio on since.

    Sgoodman5

    Year: 2011 Submodel: GT

    Helpful (5)

  • 5/5

    Installation Time: Afternoon

    November 15, 2016

    Better than stock

    The stock H-pipe was a bit raspy when I accelerated aggressively. This pipe gave my car a lower, deeper growl. The only problem I encountered were with the c-clamp bolts. One was broken and the other was bent at a 45 degree angle (raised speedbumps). They were a pain to remove, as I had little room to wiggle a wrench. It took me the afternoon to complete, but I estimate it would have been an hour had it not been for those bolts. Like another reviewer had said, all you need is patience, and you can remove them. All in all I am very happy with this purchase. I don't know about increased power, but I do feel more response when I put my foot down, and I love the sound. It's not louder by much, but definitely deeper.

    Mossman45

    Year: 2013 Submodel: GT

    Helpful (1)

  • 5/5

    August 27, 2016

    LOVE THE SOUND!!

    I was hesitant at first because I didn't want to be to loud with my KOOKS axlebacks but I think the sound is perfect. Added more throaty tone to it. All in all I love the product along with the ghost cam tune it sounds like a true muscle car. I HIGHLY RECOMMEND!!

    Hinely

    Year: 2012 Submodel: GT

    Helpful (4)

  • 5/5

    July 22, 2016

    Superb

    Easy to install and great fit. Huge flow difference over stock. Well worth it.

    YRUSLOW

    Year: 2013 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 26, 2016

    JBA After-Cat H-Pipe Best Mod so far

    Everything bolted up perfect and sounds amazing I'm glad I went with the JBA H pipe!!!

    Danny505

    Year: 2014 Submodel: GT

    Helpful (1)

  • 3/5

    Installation Time: Afternoon

    February 22, 2016

    Not much different if keeping your catalytic converters.

    H-Pipe was shipped quickly and arrived nicely packaged, thanks to American Muscle. The welds look to be pretty good except for a couple spots here and there, but overall a well made piece. Here's what you need to know. If you only have a jack and jack stands, expect this install to take well over 2 hours if you're doing it yourself. I installed this thing myself and it took me 6 hours start to finish. It's not difficult except for the fact that the factory clamps used to hold the front of the stock h-pipe onto the cats are oriented in such a way that getting the bolts off is nearly impossible. However, with a little patience it can be done. Just take your time and try not to get frustrated with it. If once you get the c-clamps loose you still have trouble breaking the stock h-pipe away from the cats, hold the clamp tight with one hand and use a hammer to bang on the bottom of the clamp where the two pipes meet, this ought to break it free. I gave the product 3 stars because I didn't find a noticeable difference in sound or performance. I get a slightly deeper tone at idle but that's about it. I kept the cats because of emissions in my state, so I'm sure that's part of it. I do however notice the crackles and pops I loved with the stock h-pipe have increased, especially on downshifts.

    RobertD

    Year: 2012 Submodel: GT Saint Louis, MO

    Helpful (4)

  • 4/5

    Installation Time: Afternoon

    December 12, 2015

    Loud

    For starters I will say this, the addition of this H-pipe will definatly open up your exhaust sound. Not too bad when driving normally on the streets or highway, but the moment you punch it, it's a screaming beast. I don't really notice much as far as HP pick up but it does sound good. I did notice that it does leave a little bit of exhaust fumes to smell when at a stand still. The biggest complain I have with the product is the fitment. JBA could have done a better job on how the ball and socket joints come together. It took several attempts to make sure there weren't any leaks. The major reason it took the afternoon to install was that it was a pain in the butt to remove the stock bolts from the cats. They wouldn't budge; however the passenger bolt that is accessed through the engine bay came off easily. Go figure. With the coupon AM offered, the price was pretty good.

    Steve210

    Year: 2011 Submodel: GT San Antonio

    Helpful (4)

  • 5/5

    Installation Time: Afternoon

    August 23, 2015

    JBA H-pipe w/ optional cat delete

    Nice product. Decided not to delete the cats. Had a shop install, worked out great. Maybe noticed a little extra HP, not much. Added a little bit of a deeper sound to my Ford Racing Touring axle backs, not much. Definitely a noticeable difference from the stock H-pipe though.

    Mike

    Year: 2011 Submodel: GT Chicago

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    June 20, 2014

    Makes the GT500 AB even sexier.

    The welds were okay looking, there was no leaks or anything so they got the job done. The packaging was great. I got these installed at a performance shop, and opted for the cat delete, although hesitantly since I didnt want it to be too loud. For reference, I have the GT500 Axle backs. The shop said the install was perfect, no gaps, no issues, no leaks. I did get a tune from Bama to get rid of the CEL since i did the cat delete for off-road use. The sound: Basically amplifies the sound of the GT500. There is little to no rasp, and just sounds MEAN. there is NO drone at hwy cruising speeds, but you can def hear it when accelerating with the windows down. If you think the gt500 is slightly not loud enough, get these. Even with the cat deletes, it's awesome sounding, without ruining your neighbors day while regularly driving. You can rev it, and wake up the neighborhood, but you can tame it as well. A slight bit loud at cold startup, but that goes away in 20 secs. Smell? isnt that bad at all. I can only smell it in my garage, but it's not a bad smell, just smells like exhaust. I cant smell it in traffic. The gains? Well, with the tune, i can def tell some immediate improvement in throttle response, and over all smoother acceleration and tq curve. I will be getting it dyno'd soon, to compare to the preinstall.

    ezpotato

    Year: 2012 Submodel: GT Minneapolis, MN

    Helpful (5)

  • 5/5

    Installation Time: Afternoon

    April 23, 2014

    Definitely louder then stock

    Install went ok, the hardest part was the removal of the old cats, that bolt on the passenger side was really on there. But the rest of the install went well except for the small exhaust leaks, which were taken care of the next day at a muffler shop. The sound is much louder with my GT500's on the car, and man what a difference in power it made. The car rips the stock rubber loose at will.

    GHIGStang13

    Year: 2013 Submodel: GT Orlando, FL, USA

    Helpful (5)

  • 4/5

    Installation Time: Afternoon

    December 21, 2013

    JBA H Pipe installation and review

    I spent the afternoon installing the jba h pipe on my '14 mustang 5.0 along with gt500 axle backs and here's what I think and you need to know: INSTALLATION: (after cat installation, I did not want to take the cats off because I live in CA) Getting the stock h-pipe off is not that difficult just save all the clamps and bolts. When installing the JBA piece the pipes line up fine but I ended up with an exhaust leak around the c-clamps for both the front parts of the pipes that connect to the cats. I think this is because the pipes just don't "go into" the cats enough, so I HIGHLY RECOMMEND some exhaust tape and it cures the issue. The back part of the pipes are connected to the rest of the exhaust system in the back with some GIANT clamps so I think that's why they did not leak. SOUND: they sound deep along with my gt500 axlebacks. I installed these both at the same time on a bone stock car and let me tell you: they rumble when you push the gas ( but not too loud just deep and throaty) and at idle they are almost same as stock ( only if your standing outside the idle sounds a little more "rumbly") If you want a nice throaty "rumble" this h pipe definately helps. As far as performance the car feels like its less restricted and can breathe better. It likes to go into the higher rpms a little easier, so all in all I'm happy with everything. AMERICAN MUSCLE ALSO GOT MY ORDER TO ME FAST AND PROMPT AND THE PACKSGES WERE IN EXCLELENT CONDTION!! THANKS GUYS :)

    Blackout50

    Year: 2014 Submodel: GT San Francisco Bay Area, CA, USA

    Helpful (9)

  • 5/5

    Installation Time: Afternoon

    August 08, 2013

    Amazing sound!

    Easy install, amazing sound, the perfect mid pipe, woke the car up completely!

    Will2004

    Year: 2012 Submodel: GT Philadelphia, PA, USA

    Helpful (4)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    April 24, 2013

    Loud!

    Just got this installed at a local shop. I decided to go with the cat deletes. I also got a tune and went with the 91 race tune from american muscle. This thing sounds like a beast!. I pulled up next to this harley that was pretty loud and when I gunned it.... my 5.0 was way louder than it. The sound of my 5.0 with the jba h pipe (cat delete) and flowmaster outlaws sound so intimidating. Its a lot louder with a deeper tone to it.Thanks AM!

    rick707

    Year: 2012 Submodel: GT vallejo, ca

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    April 09, 2013

    Great aftermarket exhaust upgrade

    Just installed this piece on my '13 GT with GT500 mufflers outback, iTSX, Steeda CAI, and Boss intake. The fit was great with minimal leakage around the crossover tube and one of the ball sockets on the cat delete pipes. With a few miles and some carbon build up the leaks should seal up. Anyway the sound. Holy smokes it makes a symphony when you stomp on the gas. The combination of this, the mufflers, and 7500 rpm is fantastic. I have always loved the sound of h-pipes over x-pipes and this does not disappoint. Not super load when driving around town but definitely makes some noise when you hit it. Cannot comment on power gains because I installed this at the same time as the cai and Boss intake but together these parts gave my car a huge boost in power. At least on my butt dyno. Highly recommend. Great addition to my car.

    Fuzzy234

    Year: 2013 Submodel: GT Oregon

    Helpful (6)

  • 5/5

    Installation Time: Less than 1 Hour

    April 05, 2013

    H pipe

    Love it gained a lot of low end and better throttle response. Sound is much deeper.

    Mustanggt500

    Year: 2013 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    March 22, 2013

    Vicious sound...

    Purchased this after-cat h pipe to go along with my GT500 axleback. Installed the optional cat-delete pipes that came along with it. First off, I have been an exhaust junky since I got into the Mustang world with my 2002 GT. Always in search of that perfect note. This Coyote motor was going to be a challenge. Lots of cackle and drone from the wrong exhaust set up. This 3" JBA H pipe really lowered the tone of the exhaust, literally no cackle paired with the FRPP mufflers and no drone at highway speeds. Install was easy, fitment was great which wasn't the case with mid pipes I've installed in the past. If you're looking to add power and gain some intimidating growl to your car without getting overly loud and annoying, this mid-pipe with a baffled performance muffler is the way to go!. The JBA 3" H pipe completed my perfect exhaust note!

    TaylorGT

    Year: 2012 Submodel: GT Columbia, MO

    Helpful (5)

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