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BBK Competition Series Off-Road Cat Delete Pipes (11-14 GT)

Item 56157
AmericanMuscle no longer carries the BBK Competition Series Off-Road Cat Delete Pipes (11-14 GT). Please check out Mustang Exhaust Accessories for an updated selection.
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    Review & Installation Video

    These are the BBK Off-Road Cat Delete Pipes for the 2011 to 2014 GT, and these offer you a fast and easy way to affordably eliminate your cats without having to purchase an off-road mid-pipe. These will work with either the stock exhaust or aftermarket exhaust. So stock or aftermarket shorty headers, and the stock or an aftermarket mid-pipe, as long as it keeps the same two and a half inch diameter. The install for these pipes is very simple. You're looking at a one out of three wrenches in the difficulty meter and you can expect to spend an hour or two getting these on the car. So the cat delete pipes will connect to the shorty headers and the mid-pipe, whether it be an X or an H pipe, it doesn't matter. The nice thing about this is you don't have to purchase a whole new mid-pipe to go catless. So you get to keep your current mid-pipe or upgrade later if you wanted to. That's gonna make this a more affordable way to eliminate your cats. These are Mandrel-Bent aluminized tubing. Aluminized tubing is nice in the sense that it tends to be less expensive than stainless steel, but it does have it's down sides. If you're shopping for a daily driver, or a car that you drive in all different types of weather, I usually recommend steering away from aluminized tubing. It doesn't have corrosion resistance like stainless steel does, so it's not gonna hold up as long as stainless steel would in those cases. But if you're not shopping for a daily driver, and you don't mind aluminized tubing, then I'd say that this is a good buy. Because these are cat delete pipes, I have to say that they're intended for off-road use only. You're eliminating your cats here and, essentially, what you'll be doing is opening up a point of restriction. That means you get more sound from your exhaust even if you have a completely stock setup. Your exact exhaust situation will determine what your car is ultimately gonna sound like though. The other thing to consider here is you will see a check engine light if you install these and you don't do anything with those O2s. A tune can eliminate the check engine light for you. When it comes to price, you can expect to spend just over $150 for these pipes. These are currently your only option when it comes to cat delete pipes. Your other option is to go with an off-road mid-pipe, but that is gonna be a more expensive than these cat delete pipes. As far as the install goes, this is a one out of three wrenches in the difficulty meter, and you can plan on spending an hour or two getting these installed. You can use a jack and jack stands to get this done, but as always, a lift would make the job easier. Once you get the car in the air, you'll need to unplug the rear O2 sensors, loosen the clamps at the rear of the cat pipes where they'll connect to the front of the mid-pipe. Unbolt and remove the cats after you pull the bolts from the exhaust manifolds. Remove the O2 sensors from the stock cats and install them into the BBK cat delete pipes. Place the cat delete pipes in place reusing the stock metal flange gasket at the headers, then connect the cat delete pipes to the front of the mid-pipe, plug back in the O2s, and you're all done. One other thing I will say here is to go back over the bolts once you've had some run-time in the car. Everything will heat up, expand, and contract back down, so you want to check for exhaust leaks and tighten the bolts. That's gonna wrap things up for the BBK Off-Road Cat Delete Pipes. As always, you can check them out more online right here at

    Product Information

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


    • Improves Exhaust Flow for More Power
    • Deletes Catalytic Converters
    • Mandrel-Bent Aluminized Tubing
    • Pre-Installed Oxygen Sensor Bungs
    • Intended for Off-Road Use Only
    • Fits 2011-2014 GT Mustangs


    Increases Overall Performance. Add even more horsepower and torque to the rear wheels of your GT by eliminating those power robbing catalytic converters with a BBK Off-Road Cat Delete Kit. BBK Off-Road Cat Delete Pipes will greatly improve your pony's exhaust flow to increase your Pony's overall performance.

    Durable BBK Construction. Made from free-flowing CNC mandrel bent aluminized tubing, these BBK catalytic converter delete pipes feature pre-installed oxygen sensor bungs and all the required fasteners for installation.

    Application. This BBK Cat Delete Kit is designed to be used on the 2011-2014 5.0L GT Mustangs with either the factory manifolds or aftermarket short tube headers installed. Intended for off-road use only.

    Fitment: Details

    CA Residents: WARNING: Cancer and Reproductive Harm -


    Customer Reviews (55)

    Write a Review

    Ratings Summary

    4.0 out of 5 overall rating from 55 customers

    Installation Time: Afternoon

    Installation Cost: $100-$250

    • November 15, 2018

      2 2011 GT - DennisP Installation Time: Less than 1 Hour

      BBK Off-road cat delete pipes

      Didn't fit that great on my stock h-pipe. Had to get them welded on to fix the exhaust leak.

      Helpful (1)
    • October 29, 2018

      4 2011 GT - Curtis Installation Time: Full Day

      Sounds great

      Had hard time getting cats off also had hard time with getting everything to fit up and stop leaking but now that everything is right the sound is awesome love it !! Downside is I got a check engine for on now even with my bama tune. I emailed bama for new tunes b4 i installed the deletes and they said i didn't need updated tune for this mod. So i installed and ended up with a cel, i emailed bama back waiting for a response.

      Helpful (3)
    • August 06, 2018

      5 2014 GT - RobinC Installation Time: Less than 1 Hour

      Pipes install

      Wasn’t to bad, had to loosen h pipe but after that they went right on.

      Helpful (2)
    • July 18, 2018

      4 2014 GT - ZachC Installation Time: Less than 1 Hour

      Works great

      Makes the car really loud an a bit more wheel HP, fitment Wasnt bad just had to messing woth a lil bit , also keep quite at low rpms witch is good for early morning in a housing development

      Helpful (2)
    • May 15, 2018

      5 2012 GT - Justin Installation Time: Afternoon

      Cat deletes

      Great increase in sound very loud, paired well with my Flowmaster outlaw catback

      Helpful (3)
    • May 02, 2018

      5 2011 GT - JimD Installation Time: Afternoon

      you can here it now

      bbk off road cat deletes good performance improvement car sounds better more power sounds like a mustang should would recommend to a friend

      Helpful (3)
    • April 21, 2018

      5 2013 GT - Jerry68

      very well built

      have not put them on yet, my engine light went off, am waiting to see what happens. Thank-you

      Helpful (3)
    • April 17, 2018

      5 2014 GT - Sharpe351 Installation Time: Less than 1 Hour

      Can't beat the price

      If you're looking to get rid of those pesky catalytic converters, BBK has you covered....

      Helpful (3)
    • April 10, 2018

      5 2014 GT - RossATL Installation Time: Shop Install Installation Cost: 0-$100

      Exactly what I wanted

      Title says it all. One thing I'll add is that everything you've ever heard about the passenger side manifold clamp bolt is true. It's the most ruthless and stubborn nut/bolt combo I've ever encountered. Luckily, I had the tools and mechanical experience to prevail. I still couldn't get it to even budge. This story ends with me reattaching the other three bolts and driving to a local exhaust shop. I honestly felt defeated, and I was frustrated, right up to the point where they started my car for the first time after completing the entire installation. Now, my only regret is not going straight to the shop with the unopened box. No drone in my car at all. Cold starts are viscous, but when driving around town or in neighborhoods, you can keep the car's sound down to an almost 'quiet' level. No louder than idle once the car is warmed up. Once you bang through a couple gears though, and you'll forever and exclusively refer to the accelerator in your car as the loud pedal.

      Helpful (3)
    • February 26, 2018

      5 2014 GT - CarlosE Installation Time: Afternoon

      Wakes the car up!

      Install is straight forward took just about an hour, you will need at least 36inches if extensions for the passenger side far right nut.

      Helpful (7)

    Questions & Answers (18 answers)

    5 Top Rated Questions

    Will these fit the BBK 1 3/4 in Long Tube headers?

    • These BBK Off-Road Cat Delete Pipes are designed for stock length headers only.

    Helpful (1)

    Hello. If I install the cat delete pipes first followed by a custom tune within 2-3 months, should I expect any other issues driving in the interim time, besides the CEL? Thank you!

    • Other issues would arise (aside from the CEL) if you're driving the vehicle without cats and without a custom tune. We strongly advise having the tune installed when the pipes are installed.

    Helpful (0)

    Could I reuse my stock cats if I needed to go back street legal?

    What size are these bbl cat deletes. Are they 3" or 2.5"?

    • The tube diameter will be 3".

    Helpful (0)

    What tuner would you recommend for this mod?

    • For these we would recommend a Bama Rev X Tuner found here:

    Helpful (0)
    Post Your Question
    10 More Questions
    I have a complete BBK long tube headers and cated mid pipe and BBK Veritune cat backs. Will this BBK off-road cat delete pipes fit with the long tube headers 1 answer
    If i get caught in the rain with these will rust? I know they are off road use only but I mite take my car on the street some time 1 answer
    Bama X4/SF4 Power Flash Tuner will this tuner be able to turn the check engine light off? 1 answer
    Will these bolt right up? I have a muffler delete and resonator delete? 1 answer
    Will the BBK off road cat deletes fit with the Pypes X Pipe ? 1 answer
    Will this fit with 1-7/8 kook shorty headers and 3 in magnaflow true x pipe? 1 answer
    Can these Bbk cat delet match up with magniflow XPIPE???? THE BBK cat delet seem to be stock length. And the magniflow XPIPE is stock lenght 1 answer
    Well these fit on my 2013 V6 1 answer
    Will these work with my pypes offroad X pipe? If so will it help the sound or wont make a difference? Thank you. 1 answer
    what about the check engine light? It will turn on with this product? 1 answer

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (2) Cat Delete Pipes

    Tech Specs

    Will It Fit My Mustang

    • Boss 302 - 12, 13
    • GT - 11, 12, 13, 14

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