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Pypes Off-Road Cat Delete Pipes - Stainless Steel (11-14 GT, Boss)

Market Price $181.99 You Save 9% ($17.00)
Our Price

$164.99

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  • Item 102021
  • MPN# DFM76

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Features, Video & Details

  • Improves Exhaust Flow for More Power
  • Deletes Catalytic Converters
  • Mandrel-Bent Construction
  • 3" 409 Stainless Steel Tubing
  • Pre-Installed Oxygen Sensor Bungs
  • Intended for Off-Road Use Only
  • Fits 2011-2014 GT and BOSS Mustangs

Review & Installation Video

Review & Install Video

Hey guys, Justin with americanmuscle.com here with my detailed review of the Pypes off-road cat delete pipes available for your 2011 through 2014 Boss and GT Mustang. In this review, I'm going to cover what you can expect as far as benefits when installing a cat delete system like this from Pypes, what you're going to be looking at as far as basic materials, and then a quick little walkthrough on the install itself. While the install is pretty basic in principle, you're looking at two bolts here at the flange, a basic clamp on the midpipe section, there is a little bit of work involved here, guys. Most of it is done underneath the car with a little bit of work through the engine bay. So, I'm going to stretch this one up to a two out of three on the difficulty meter. We'll talk a little bit more about that later on. You should be checking out this system from Pypes if you're looking to increase both the power and the sound in your Coyote-powered Boss or GT Mustang and you're still working with the factory manifolds or an aftermarket set of shorty headers. This is very important to point out, guys, because obviously these things will not work with a set of long tube headers. With that said, however, this would be a good alternative to you guys at home who might be thinking about long tube headers but maybe don't have the money in the budget at this time or don't have the means to install them. With that said, let's get a little further into this system from Pypes. Pypes has a reputation within the industry here to produce some very budget-friendly stuff with the goal of increasing your sound without totally wrecking your budget in the process. These things fall right in line with that. I would categorize these Pypes deletes or cat deletes as a more entry level or value option. With that said, they're going to perform as intended. They have a very favorable rating on the site, and the customer reviews are all pretty awesome. Check them out if you haven't done so already. The factory catalytic converter certainly served their purpose, however they can be a performance and sound killer on your GT or Boss build. Uncorking those factory cats using Pypes' delete system here will not only increase the overall volume and just aggressiveness of your exhaust tone, but you can also look forward to a little bit more power as well thanks to the less restrictive flow. Yes, you can run this system from Pypes without a custom tune, but honestly, guys, you're going to want to pair this thing up with a custom tune. The reason is twofold. First and foremost, you're going to squeeze out a little bit more power along with that custom tune and the cat delete system here from Pypes. In addition to that, you're also going to be able to turn off that check engine light that's ultimately going to say hi to you as soon as you delete those cats. As far as your basic construction, you're looking at 16-gauge 409 grade stainless steel throughout here, guys, 3-inch mandrel bent from tip to tip, factory style connection, 2-bolt flange here at the manifold side, ball and socket style flange at the midpipe side. They do include two pre-welded O2 bungs here. The welds don't look half bad honestly for being a value system. They're even throwing in some brand-new hardware and two clamps for you. I did touch on fitment a little earlier in this video, but I do want to spend a little bit more time on that, guys, because I just want to clear up any confusion and make sure you're ordering the right part. I want to make sure this thing is going to fit your ride. First and foremost, for your header or manifold side, this thing, again, will only fit a factory shorty manifold or your factory header or an additional aftermarket shorty header without issue. As far as the midpipe side of things, well, again, this kit will fit with your stock midpipe without issue or any aftermarket stock length midpipe. X or H pipe, it really doesn't matter here. In my experience, guys, sticking with the same manufacturer for these parts, whether it be the cat deletes and your midpipe, will only result in the best fitment. In this case, you might want to check out the Pypes stock length midpipes. They do offer both an X and an H pipe here on the site. Again, we do have some other options as well. But take my advice, stick with the Pypes stuff, you'll get some good fitment. Finally, I just want to remind you again these will not work with any aftermarket long tubes out there. I know it might be pretty obvious to most of you guys at home, but if you didn't know, now you do. Perhaps one of the best things about this kit here from Pypes is the price, guys. I mentioned it earlier. I'll mention it again. Pypes, as a brand, they're generally one of your more entry-level or budget-friendly brands out there. That's certainly the case here with this system. Looking right around 150 bucks for the cat deletes, which seems reasonable given the materials you have here. Honestly, that's going to peg the bang-for-your-buck-o-meter, at least in my opinion here guys, because you're getting a whole bunch more sound. You're getting a little bit more performance out of adding this kit, but again for not a whole lot of dough. I do want to quickly mention as well, guys, if you don't have one of those midpipes we talked about a little bit earlier, one of those aftermarket midpipes, Pypes does offer a combo kit that pairs up the cat deletes here with a stock length X or H pipe that we talked about a little bit earlier. The pricing is still very reasonable for the combo kit. In fact, it's the way I went when I first got my GT. I went with their off-road H pipe system, and I couldn't have been happier with the results. Switching gears, let's touch on the install. Obviously, much easier than a set of long tube headers, right? That goes without saying. But there still is a fair amount of work involved here, so I'm going to go middle of the road, two out of three wrenches on my difficulty meter, maybe a couple of hours from start to finish to get these guys installed. As far as tools, you're looking at a few metric sockets, a bunch of extension because there are a few bolts you'll need to hit through the engine bay there, and maybe a can of your favorite penetrating oil in case you run into some rusty bolts. Obviously, most of your work is done underneath the car here, guys, so jack and jack stands would suffice. But a lift would be ideal. I did talk about that penetrating oil a little earlier. That will just come in handy again if you live in a snowy or salty area. Those bolts might be a little tough to get off. If the WD-40 or your PB Blast doesn't cut it, try a little heat because that will ultimately be your best bet with removing stubborn exhaust bolts. Going even further, guys, it might not even be a bad idea to have a little tube of high-temp RTV on hand. Because you shouldn't need it, but if you do encounter a small leak at the midpipe connection, you'll certainly be thankful you have it. All right, guys, at the end of the day here this is a great bang for your buck mod that I've had installed on my very own car with great results. If you're not willing or ready to fork out the dough for a set of long tubes or tackling the rather difficult install that goes along with them, this is a great compromise that will give you some good sound and power improvements. They're going to be a lot easier on your wallet compared to those long tubes. And they're certainly going to be a lot easier to install as well. That's my review of the Pypes cat delete system which you can find right here at americanmuscle.com.

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

Durable Stainless Steel Construction. Manufactured from free-flowing CNC mandrel bent 16 gauge 3" 409 stainless steel tubing, these Pype catalytic converter delete pipes feature pre-installed oxygen sensor bungs and all the required fasteners for installation.

Application. This Pypes Cat Delete Kit is designed to be used on the 2011-2014 5.0L GT and BOSS Mustangs with either the factory manifolds or aftermarket short tube headers installed.

Technical Note. Not legal for use on pollution controlled motor vehicles; intended for off-road use only.

Fitment: 2011 2012 2013 2014 Details

What's in the Box
  • (2) Cat Delete Pipes
Installation Info
Will it fit my Mustang?
  • GT - 11, 12, 13, 14
  • Boss 302 - 12, 13

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
Amazing quality and fitment

they were a direct bolton beautifully crafted to fir perfectly

Helpful (1)

5/5
Good fit

These fit right up with stock manifold. I had a shop install them along with an H pipe. Both of these items and a pair of GT500 mufflers and my car sounds mean!

Helpful (1)

Overall Rating 3.5 out of 5 stars
Read All 60 Reviews

Customer Photos (7) Submit Your Photo

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8 Questions / 5 Answers

Ask a Question

Where do I get a tune to run these on my car without throwing any codes or mechanical issues?

ClintB

Helpful (0)
  • You can get the Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (11-14 GT, 12-13 BOSS), item # 101200G11, (http://www.americanmuscle.com/x4-custom-tuner-2011gt.html). This tuner will come with 2 custom tunes that will be made just for your car. This will adjust the car to any mods that you have made. Also, if you ever make any other mods to the car, you can request a free tune as well.

    AshleyK

will these work with Heartthrob Flowpack Cat-to-Axle X-Pipe Kit? i cant seem to find an after x-pipe kit with mid mufflers or resonators from Pipes

EddieS

Helpful (0)

Would this pipes fit my 2012 Mustang V6? i have a catted X and want to go catless. I see you guys dont have these pipes listed for V6 models.

williamsF

Helpful (0)
  • Unfortunately, these down pipes are designed for the 11-14 GT and the 12-13 Boss. We cannot guarantee fitment of them on a V6 model.

    AshleyK

I ordered and installed the cat delete kit. I noticed that my car have blue smoke from exhaust at cold start. I recorded a video for comparison before the installation and there wasn't blue smoke before. Is this normal after cat delete? I didn't have oil consumption issue before as well.

James

Helpful (0)
  • When installing the Pypes Off-Road Cat Delete Pipes - Stainless Steel (11-14 GT, Boss) you will want to have a tune on your car. This could be the cause of not having a tune on your car.

    Ricky36

Will these connect to the Pypes cut and clamp X-Pipe?

DocLu

Helpful (0)
  • The Pypes Off-Road Cat Delete Pipes - Stainless Steel (11-14 GT, Boss) will connect to the Pypes Cut and Clamp X-Pipe (05-10 GT) item #20066 (www.americanmuscle.com/pypes-0509-v8-xpipe.html) as they have the same 2.5" piping size.

    KevinD92

Does anyone know if the gas mileage goes down,??

Tmac50

Helpful (0)
  • Hi,Installing these Pypes Off-Road Cat Delete Pipes - Stainless Steel will make your MPH will drop, I suggest getting a tune to compensate for the loss

    Chris J

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Customer Reviews (60) Write a Review

Overall Rating 3.5

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Loudness / Volume 4.636364 4.6
  • Exhaust Note 4.472727 4.5
  • Fit & Finish 3.490909 3.5
  • Bang For Your Buck 4.018182 4.0



  • 2/5

    Installation Time: Afternoon

    November 04, 2016

    Pypes o/r pipes.

    Quality materials , good performance gain. Absolutely horrid fitment issues !!! Says that these will fit with other pypes pieces OR oem connection. DID NOT fit up to the oem connection, the clamps need to be either wider or neck down from 3 inch to stock.

    StoneRhino88

    Year: 2013 Submodel: GT

    Helpful (1)

  • 1/5

    Installation Time: Full Day

    October 12, 2016

    Absolute Garbage. DO NOT BUY

    2014 GT, flowmaster outlaw catback. These plain and simple do not fit. The clamps that come with it do not provide enough clearance to actually clamp down. When you try to bolt the flange bolts back in, not only do they just spin (because of the cheap "steel" that they use) but since the clamps cant hold on they just slip off the x pipe. Even using OEM clamps the joints just dont sit securely enough to actually "grab" I am so unbelievably frustrated at the lack of quality control and the fact that no one has looked into this shoddy product with all of these reviews. There is a MAJOR issue with this product. Absolutely unbelievable.

    JonnyZed

    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    September 20, 2016

    Growl

    Nice sound,not to loud or raspy,just enough to make it sound mean,perfect fit,went on in no time at all...very happy.

    Mr02Stang

    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    May 22, 2016

    Cat deletes

    Love the product..for the most part simple and fast to install

    Sandie

    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    March 23, 2016

    Excellent

    Sounds great just what i was hoping for! Deep groan at idle, but amazing sound at high revs

    JT

    Year: 2012 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    September 24, 2015

    Great!

    Just got these installed to replace a set of busted cats. They sound an look great! Shipping was fast as usual of course. Nothing but a happy customer here!

    Tiff

    Year: 2014 Submodel: GT Portsmouth, Va

    Helpful (1)

  • 3/5

    Installation Time: Shop Install

    March 21, 2015

    not so good fit, but sound is good

    Installed on a stock factory exhaust. The sound is good. The installation was not so good. I had it installed by one of the best muffler shop in Miami and it took them 3 hours to get the leak out and to get it aligned. $270 labor charge for that. This was also shipped with missing bolt. I ended up buying another one and replacing all the washers and nuts with stainless

    GEM17

    Year: 2014 Submodel: GT Miami, FL

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    February 13, 2015

    Good fit

    These fit right up with stock manifold. I had a shop install them along with an H pipe. Both of these items and a pair of GT500 mufflers and my car sounds mean!

    ChrisMyers

    Year: 2013 Submodel: GT El Paso, TX

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    December 18, 2014

    Amazing quality and fitment

    they were a direct bolton beautifully crafted to fir perfectly

    14trackgt

    Year: 2014 Submodel: GT Orlando, FL, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    October 17, 2014

    pypes cat delete

    Nice fit except the driver side one had the bung for the O2 sensor aiming slightly down. It is lower than anything else under the car and could get hit if going over a speed bump. No big deal though if you think about it. That O2 sensor is for after the cat. Since the cat is now gone the sensor is not needed. Just put the plug in the pipe and delete the sensor in your tune. The exhaust tone is nothing short of beautiful with the stock mufflers. I went to the hardware store and picked up some grade 8 bolts and it was much easier to put together than take apart, because you can put the nut on the side you can get to easier. Enjoy

    ce750man

    Year: 2014 Submodel: GT Janesville, WI, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    October 17, 2014

    Cat deletes

    If you want to turn the volume up to 11, these are what you need! By far the hardest part about installing these is taking the stock cats off. As everyone else has said, accessing the top passenger side bolt through the engine is an option, but you could also use an open ended crowfoot wrench and get it from under the car (which is how I did it). These will give your mustang a more raw aural experience, but might be too much depending on your current mufflers. Definitely not for everyone. Feels and sounds like it pulls harder everywhere.

    SuperCJ428

    Year: 2011 Submodel: GT

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    October 23, 2015

    Cat deletes

    As others have said, it took longer to get the cat conv. off than to put these pipes in. Made my car too loud, like obnoxiously loud, esp. with the Roush axle backs I have. But I made a miniature glasspack insert to slide in each pipe and it sounds great now.

    Tombstone

    Year: 2014 Submodel: GT Percy, IL

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 15, 2015

    AMAZING SOUND

    Have borla s types and wanted some more grumble... I definitely got it with these car sounds so angry now!! as far as the install goes in order to make the leak that some people seem to be talking about go away all you need to do I unbolt the h pipe and slide forward slightly then they go perfect snug no leaks.

    usmcbearer

    Year: 2013 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    February 13, 2015

    Awesome!

    These pipes bolted perfectly up to the headers with no issues. Much easier to bolt these in than it was removing cats. The flange was thick, and the pipes were nicely tig welded. The bunges were also a great fit. The only one complaint I have is that these do not come with gaskets. So be prepared to buy new, or use existing ones. Slightly expensive for what they are, but overall a great buy. Side note ( I removed the cats and also run SLP Loudmouths. Very loud, so if you're worried about police or neighbors, you may want to think twice.)

    Trav810

    Year: 2014 Submodel: GT Tampa, FL

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    July 23, 2014

    Best Bang For Buck

    These cat delete pypes are made very we'll by pypes it's a little ruff getting the catalyst converters off but once you get them off and put these on you will be amazed.!!

    Larry10

    Year: 2014 Submodel: GT Florida, USA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    July 18, 2014

    Very pleased

    If your looking for the mean muscle car sound look no further! I put these on my mustang and I cannot describe the difference in sound and HP gain! Well worth buying!

    TomTom1

    Year: 2012 Submodel: GT Athens, Alabama

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    June 25, 2014

    Very easy to install after removing original cats

    The factory cats were hard to remove due to the bolts being so tight other then that the pypes delete pieces lined right up

    Sax88jr

    Year: 2013 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 27, 2014

    If you want added power, and sound, this is for you.

    I bought this paired with the Pypes X Pipe and Pypes catback, and everything together made my Mustang a completely different car. It made the car much louder than stock, and paired with a tune, I definitely feel a power difference. Though, all of these together will make your car extremely loud. So if you live in an area where the cops care about how loud your car is, I probably wouldn't recommend this. I, on the other hand, haven't had a cop look at me or have had any issues with the sound. The sound, in my opinion, is awesome, and makes me smile every time I start my car up. If you want more power, and a louder car, I definitely recommend getting this product, paired with the catback and x pipe. You won't regret it!

    Yeahlance

    Year: 2011 Submodel: Other

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 17, 2014

    Amazing. No other words describe it.

    These new cat deletes will have your jaw dropping!!! Installation was a hassle though! Not the installation itself, but the removal of the cats was horrible. Be ready to have a a gun with enough torque to get those bolts off! But other than that, figment is PERFECT. No leaks or odd noises. Just that MONSTER noise it gives my '14 5.0. I'm running these cat deletes with factory h-pipe, resonator delete and a flowmaster outlaw axleback. My car is WAY too loud though so I'm thinking to going down to maybe american thunder by flowmaster. Overall, these cat delete are well worth your money.

    MrFlowers96

    Year: 2014 Submodel: GT Oxnard, CA, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 14, 2014

    The Sound O The Sound!!!

    The sound, what can I say but WOW!! If you like turning heads as you drive by then this is exactly what you need. Ove-corse you get a weight reduction of approximately 15-20lbs for taking those ridiculous cats off. And sure the additional 20hp is a given. But that sound tho... I have a borla x pipe and flowmaster american thunder axleback exhaust, and that combo is music to my ears.. Quite difficult to install due to the position of the bolts, especially the one that can only be accessed threw the passenger side of the engine. So make sure you have all the proper equipment for the job if you intend to do it yourself. Took me an afternoon because i did it alone and by hand. But O man was it worth it once you turn that baby on.

    Iceman61485

    Year: 2011 Submodel: GT Edinburg, TX

    Helpful (1)

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