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Pypes High Flow Metallic Catalytic Converter Kit (11-14 All)

Market Price $312.99 You Save 9% ($29.00)
Our Price

$283.99 (pair)

FREE Shipping
  • Item 20135
  • MPN# CVM11K

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Perfect for Force Inducted Mustangs
  • Rugged Construction
  • Polished 409 Stainless Steel Exterior
  • Metallic Substrate Material
  • Small Under-Carriage Footprint
  • Will Pass Most Emissions Tests
  • 3" Inlet/Outlet Diameter
  • Fits All 2011 to 2014 Mustangs
High Flow. Are you looking to free up your restrictive stock exhaust, but are required by law to run Catalytic Converters? Then AmericanMuscle has the answer you need in the form of Pypes High Flow Metallic Catalytic Converter Kit.

Easy swap at the track. Every car enthusiast knows that catalytic converters suck the lifeblood - horsepower - out of your engine. If you're running a Pypes modular x-pipe style configuration for track / racing purposes, these cats give you an easy way to be street legal when you leave the track.

Rugged construction. These Pypes Mini Catalytic Converters are build from polished 409 stainless and feature a durable Metallic substrate material making them perfect for force inducted applications. They weigh in at 2.5 lbs each and only measure 11 inches in length.

Small Footprint. Installed, the Pypes catalytic converters have a very Small under-carriage footprint that only takes up a virtually invisible 7” in length making them perfect for custom applications.

Will pass most emissions tests. Pypes High Flow Metallic Catalytic Converters will pass emissions testing procedures in most states. However, check your local and state ordinances for installation and usage regulations.

Application. The Pypes High Flow Metallic Catalytic Converter Kit is specifically designed for use with power adders such as a Supercharger, Turbo-charger, or Nitrous equipped Mustang from 2011 to 2014.

Fitment: 2011 2012 2013 2014 Details

What's in the Box
  • (2) Catalytic Converter
Installation Info
Tech Specs
  • Universal 3" OD and ID design
  • Polished 409 stainless steel
  • Metallic substrate material
  • Includes slots and 02 bungs
  • Sold as a set of two
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • V6 - 11, 12, 13, 14
  • GT - 11, 12, 13, 14
  • GT500 - 11, 12, 13, 14

People Who Bought This Item Also Bought

Most Helpful Reviews

High Flow cats do make a difference

I asked around a lot of people and they would say don't get high flow cats you won't gain any power or sound. That's a complete lie, you feel the car open up and breathe a little better in terms of power ...

Read More
Helpful (1)



Helpful (1)

Overall Rating 4.5 out of 5 stars
Read All 14 Reviews

Customer Photos

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12 Questions / 7 Answers

Ask a Question

Tune Do I need a tune?


Helpful (1)
  • A tune is not REQUIRED, but always RECOMMENDED to maximize the performance you are able to get out of your mods. Contact BAMA and see what they can do for you, Great Guys!


Show 1 more answer Answer This Question

Hi AM, I currently have a 2013 V6 with Roush ABs and CAI. Along with BBK Shorty Headers and plan to keep it that way. What will be some differences regarding volume and tone? Will these cats throw a CEL? Thanks!


Helpful (0)
  • The car will most likely be slightly louder. You should not have any codes thrown because of these cats.


This might be a stupid question, but will these fit on the stock hybrid pipe that comes on the 11-14s?


Helpful (0)
  • These can fit with the stock hybrid pipe however these are designed specifically for Mustangs with forced induction.


Do these require custom fabrication or bolt up to the stock headers and h pipe


Helpful (0)
  • Hello! This Pypes High Flow Metallic Catalytic Converter Kit is not a direct bolt on. They are a universal fit for adding in high flow cats to an exhaust that originally did not have ones or someone who wants to change out the restrictive stock cats. The exhaust will have to be cut, measuring to make sure that the 3" diameter is large enough to slip over the existing exhaust and long enough to connect pipe to pipe.

    Ryan H

Answer This Question

Hey AM! I was wondering if these could be retrofitted onto a set of Borla long tube headers and cat back exhaust for emissions purposes. It would make having the power and legality much easier. Thanks in advance!


Helpful (0)
  • These Catalytic Converters will require custom cutting and welding depending on application.


Answer This Question

So the holes in the cat(is that where the front o2 sensors go?) and I just plug up the old holes from factory cats? Also should these throw any CEL?


Helpful (0)
  • Correct, The holes in the Pypes High Flow Metallic Catalytic Converted (11-14 All) will be for the front o2 sensors. These Catalytic converters will pass most emissions and should not throw a check engine light. However we would still recommend getting a custom tune for these.


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Customer Reviews (14) Write a Review

Overall Rating 4.5

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Performance Gain 4.3 4.3
  • Fit 4.3 4.3

  • 2/5

    August 13, 2016

    CEL issue

    Bought these because I wanted my stang to be a little louder which this product totally delivers on! BUT it does come with a CEL issue. I had these installed by the dealership and now 1 week later CEL. Took back to dealership and they said it is just throwing the CEL because of sensors. It is completely hooked up properly but they said it will throw a CEL unless I tune it out(which will void warranty). Wouldn't recommend if you don't want to tune your cats out.


    Year: 2013 Submodel: GT

    Helpful (1)

  • 5/5

    August 03, 2016




    Year: 2011 Submodel: GT500

    Helpful (1)

  • 5/5

    July 14, 2016

    High Flow cats do make a difference

    I asked around a lot of people and they would say don't get high flow cats you won't gain any power or sound. That's a complete lie, you feel the car open up and breathe a little better in terms of power and not only that they make the car sound like a beast. Add around 15-20 volume and make the tone a lot more aggressive, I paired these with a JBA 3 inch to 2.75 Inch H pipe and it made my roush axle backs scream, the car sounds like a beast.


    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    December 06, 2013

    Finally impressed with my exhaust

    I have been doing research for months trying to decide if I want to get high flow cats or not. Some ppl say that they are the same as your stock cats, I call bulls**t. I got the shop to install these, they did have to make a few custom changes to it but as long as there are no exhaust leaks I'm happy. I started my stang up from a cold start and instant smile on my face! I have the magnaflow tru x pipe, no resonators, and 10 series mufflers. I wanted a loud exhaust and it was loud before I put the cats on but not satisfied. After hearing my car now I am finally satisfied. As far as performance gains, I cannot tell because it was wet on the roads. No complaints the O2 sensors went in perfectly, no check engine light either. If you want your car louder I definitely recommend some high flow cats


    Year: 2012 Submodel: GT

    Helpful (3)

  • 4/5

    Installation Time: Afternoon

    February 27, 2014

    2013 3.7L highFlow cats

    noticeable improvement in performance, final piece to my exhaust which let it breathe. (full intake/exhaust) The sound has changed completely. It is louder.


    Year: 2013 Submodel: V6 Davie, FL, USA

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    March 16, 2016

    Great addition

    The sound quality is increasingly better, louder, and bolts up perfectly. Great product.


    Year: 2012 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    March 07, 2016

    Functional and compliant!

    Converters fit great while I made my own catted connection pipe between Borla long tube headers and Corsa Sport cat back exhaust. They came in polished and the O2 sensor fit perfectly inside of them. It was a good by if you want to be compliant.


    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    February 16, 2016

    Does the job for inspection but exhaust note is still great.

    Before installation of these high-flow cats, my exhaust setup was stock headers - cat deletes - xpipe - deleted resonators - GT500 dual tip axle backs, and I loved the sound. But I couldn't get the O2 sensors to be "ready" to pass inspection. Even with the proper tune loaded. So I installed these and passed inspection no problem and the sound is still great, just a little bit quieter at low rpm. I should have installed these high flow cats to begin with.


    Year: 2013 Submodel: GT Tomball, TX

    Helpful (1)

  • 5/5

    July 02, 2015

    high performance catalytic converter

    The high performance catalytic converter awoken my mustang allowing it to breath better. I also gave it a better sound to it. A very deep note was accomplished after installed. It took like to hours to wield on. I was very satisfied, now I'm on to getting bbk headers added to my car.


    Year: 2014 Submodel: V6 Arlington,tx

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    February 19, 2015

    High Flow Cats with a Forced Induction setup

    Have to ship my car to Germany and must pass emissions, Was worried about the restriction from installing cats with my Procharger setup. Over 500 miles and feel no loss of power or lag, flows excellent! Can't beat the Price and As always AM shipped promptly! Will not buy from anywhere else!


    Year: 2014 Submodel: GT fort Gordon, GA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    December 20, 2013

    High quality Cats

    The quality of these are impressive. Small form to fit clean and fab into place. Much needed with my 3" heartthrob exhaust which is also the smart way to do this on a budget.


    Year: 2012 Submodel: GT Las Vegas, NV, USA

    Helpful (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    June 29, 2016

    High flow!

    Got these because my stock cats were taken off for more HP but it became to loud over time so I put high flow cats on and let me tell there is not much of a HP difference between running no cats compared to high flow cats they noise is a little louder then stock but not in bearable also remember these are 3in cats so you might have to have them wielded on, other then that it's a good product a must buy if you want more HP/TQ but don't want it unbearably loud.


    Year: 2013 Submodel: GT

    Helpful (0)

  • 2/5

    Installation Time: Afternoon

    February 15, 2017

    Not too happy :(

    I had these cats installed on my 08 Stang, engine only has JTL CAI everything's pretty much stock. Added these cats and along with Offroad X and they just recently failed about 3 days ago CEL is on for Cats bellow efficiency threshold. Now I do have a tuner and I do have a catted and catless tune. I ran catted because it is catted and wanted everything to be emission friendly but still have that great sound. I am now trying to see if the car will still run properly with a catless tune, not too sure.. It'll turn off the rear 02 and probably not throw a code again. But This kinda sucks 284 dollars down the drain after 10k miles :( My car only has 60k miles on it.


    Year: 2008 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    December 05, 2016

    Worth the money.

    Well I'm not much of a mechanic and I didn't know that if you don't plan to change your headers than no point changing the cats. It is a difficult job and pointless without the headers.


    Year: 2011 Submodel: GT

    Helpful (0)

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