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Pypes High Flow Metallic Catalytic Converter Kit (86-10 All)

9 Reviews
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  • Item #20105
  • MPN #CVM11K
  • Market Price $336.99
  • You Save 9% ($31.00)
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  • Perfect for force inducted Mustangs
  • Rugged construction
  • Polished 409 stainless steel exterior
  • Metallic substrate material
  • Small under-carriage footprint
  • Will pass most emissions tests
  • 2.5" inlet/outlet diameter
  • Fits 1986 to 2010 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 1986 to 2010. If you have a naturally aspirated Mustang then check out the Pypes High Flow Ceramic Catalytic Converter Kit.

Mustang Fitment: 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Details

What's in the Box
Hardware included:
  • (2) Catalytic Converters
Installation Info

Installation Time: (approx) 4 Hours

Difficulty Level:Advanced mechanical skills required.

Tech Specs
  • Universal 2.5" OD and ID design
  • Polished 409 stainless steel
  • Metallic substrate material
  • Includes slots and 02 bung for 2005-2010 Mustangs
  • Sold as a set of two
  • Bullitt - 01, 08, 09
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10
  • Cobra - 94, 95, 96, 97, 98, 99, 01, 03, 04
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10
  • GT500 - 07, 08, 09, 10

Most Helpful Reviews View All

Overall Rating 4/5 Write a Review
be cautious

I purchased the Pypes X pipe w/cats (Part#) EX1050 for my 94 GT. They sounded great, but I had to e-test my vehicle shortly after installing the Pypes cats after a few thousand kms on the car. The emissions

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Helpful (19) (1)

high flow cats

This cats are alright but for the price they arent worth it. Consider magnaflow high flow cats. i had these installed and they went out in a 1yr.

Helpful (17) (2)

Customer Photos

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Q & A (3 Questions, 3 Answers) Ask a Question

long tube headers? Will adding this stop the check engine light that comes on after installing long tube headers?

dgd27 Year: 2010 Model: V6

Good Question (0) (0)
  • Yes and no. It depends on the codes the ECU is putting out. They may or may not be from the headers but yes a high flow cat will help on a mid pipe that doesn't already have them on. Not to mention o2's will read right then...

    Helpful (0) (0)

    MustangSally71 Year: 2000 Model: GT

    Top 500 Contributor

Show 1 more answer Answer This Question

Will these run smoothly with a N/A engine? As of right now, my engine is N/A, but pretty soon down the road i plan on supercharging it. and i'd hate to have to buy a new set of cats when i do. Will these run smoothly with a N/A engine?

Lorashal Year: 2005 Model: GT

Good Question (0) (0)
  • Yes they will be fine

    Helpful (2) (0)

    TBang Year: 1994 Model: GT

    Top 100 Contributor

Answer This Question

if i install these on a mustang that isnt naturally asperated will it affect the sound I have a 05 GT and planned on installing the exhaust before major upgrades like a supercharger but I plan on installing one. will this affect the sound negatively

flaminrims Year: 2005 Model: GT

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Good Question (0) (0)

Reviews (9) Write a Review

  • 5 Stars .67 67%
  • 4 Stars 0 0%
  • 3 Stars .11 11%
  • 2 Stars .11 11%
  • 1 Stars .11 11%

out of 5 stars

5 Customers Recommend this Product

Installation Time:Afternoon

  • Performance Gain: 4 4/5
  • Fit: 4.5 4.5/5
  • Bang For Your Buck: 4.5 4.5/5
Filter By Sort By
  • 1/5

    be cautious

    April 07, 2010

    I purchased the Pypes X pipe w/cats (Part#) EX1050 for my 94 GT. They sounded great, but I had to e-test my vehicle shortly after installing the Pypes cats after a few thousand kms on the car. The emissions (Nox) failed e-test miserebly (Ontario Canada). I put my original factory cats back on and the car passed with flying colors.

    C V

    Year: 1994 Model: GT

    Helpful (19) (1)

  • 2/5

    high flow cats

    March 24, 2010

    This cats are alright but for the price they arent worth it. Consider magnaflow high flow cats. i had these installed and they went out in a 1yr.


    Helpful (17) (2)

  • 3/5


    October 06, 2011

    I had bought the pypes O/R x pipe with my SLP LM1's and it was crazy loud. which was fine by me. But the exhaust smell was bad when i was in a drive thru or something like that. So i decided to buy these and it quieted it down a little bit but my check engine light is still on and i have no increase in power.


    Year: 2002 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 New Orleans, LA

    Helpful (2) (0)

  • 5/5

    Excellent Price/Quality

    April 01, 2011

    Great fit/finish. I have the pypes LT's w/off road X, had a great sound except for some trumpeting around 2k-3k rpm when I was accelerating hard. The cats took that away and turned it in to the perfect growl. They also got rid of the exhaust smell, which was just an added bonus. Install was easy as cake, only had to make two cuts to the modular pieces between the long tubes and mid pipe so I can always buy another set of modular pieces from Pypes if I want to go without when I take it to the track.


    Year: 2005 Model: GT Driving Style: Street / Strip

    Helpful (2) (0)

  • 5/5

    awesome sound and flow

    October 14, 2010

    When I bought these I got the PYPES catted x pipe. The sound and flow is amazing. Fitment was horrible. I had to rig ratchet straps to pull the pipes together to bolt on. Other than that. Its a great product.

    nick f

    Driving Style: Daily Driver

    Helpful (4) (2)

  • 5/5


    December 07, 2011

    This was an easy install. You can clamp or weld the but strongly recommend you weld them in. The appearance is sleek and clean. For those who have states that require catalac converters this is a great option. Highflow and don't restrict what you're trying to achieve in horsepower gains. Great bang for your buck. Literally!

    Top 500 Contributor


    Year: 1998 Model: Other Driving Style: Show 'Stangs I have owned: 2 Germantown, MD

    Helpful (1) (0)

  • 5/5

    Very Happy

    October 10, 2011

    Replaced factory catalytic converters when they started to fall apart within, causing a rattle noise at wide open throttle. Exhaust shop removed resonators (which I didn't ask for) and factory cats when installing these, and I love the exhaust sound of my V6 now. I've had other mechanics (experienced ones at that) say to me "Is this really a V6?". Not only that, fuel economy went from 22.6mpg highway to 27.9mpg. That's significant, very happy with the product. Inspection of the cat install after the fact revealed that the due to the size and shape of the cat, the left converter is slightly too close to the body of the car since the cats do not come with heat shields. No problems there after 6 months of summer driving.

    Top 100 Contributor


    Year: 2004 Model: V6 Driving Style: Daily Driver 'Stangs I have owned: 1 Lethbridge, AB, Canada

    Helpful (3) (2)

  • 5/5


    October 15, 2010



    Driving Style: Show

    Helpful (1) (1)

  • 5/5

    2006 Mustang gt

    January 20, 2015

    Makes a huge difference to the way on air flows... Made my Stang feel lighter and sounds a lot better than it did befor . It's makes a great combination with the stock flowmasters... I realy recommend these bad boys


    Year: 2006 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 Fresno, CA, USA

    Helpful (0) (0)

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