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Pypes Electric Exhaust Cutout Kit; 2.50-Inch (Universal Fitment)

Item 20044
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      Review & Installation Video

      Hey guys, Stephanie with, and this is my review of the Pypes electric exhaust cutout kit that will work for all 1979 to 2014 Mustangs. The Pypes electric exhaust cutout kit is going to be for the Mustang owners out there that would love to be able to change their exhaust note on the fly and go from a normal sound to a much louder one in a few seconds. This kit gives you the ability to hit a switch and create a wide-open exhaust and then switch back whenever you want to. All right, this is really the only kit of its kind that's available on the site right now. It's coming in at a price point between $400 and $500, being a little bit closer to the $500 mark. The kit has a few different components to it, including the Y-pipes here. Unlike some other kits that are out there like this, the Y-pipes do come with the whole kit here. The Y-pipes are two and a half inch, and they're designed to work with a two and a half inch diameter mid-pipe. They also come with a three-inch flange to make the install easier. Then, you have the two cutouts that have CNC machine to billet aluminum housing. The housings are made to have a precise fit with the Y-pipe to avoid any leaks. The housings also have a double butterfly seal that has an O-ring so you don't have to worry about leaks there, either. Another cool thing about the housings is that they have a built-in thermal protection device that will help protect your electronics. This is a little bit more reassurance as far as the product life goes. This is even on top of the manufacturer's limited lifetime warranty. We've got the Y-pipes and the cutouts. We're also looking at a wiring harness for you to wire in your switch to the cabin so you can activate the cutouts from the driver's seat as you please. The exterior connectors that control the cutouts are actually weather-tigh,t which is another thing to consider when you're running electronics outside of the car like this. The last thing we have here are the gaskets that you'll need. If we take a look at them here, they are extra thick. Those look good to me. There's also stainless steel mounting hardware, which is another sign that tells me that Pypes did consider all of the angles with this kit, being that it's subjected to the heat of the exhaust as well as the open elements of the weather. Let's talk about the install and the position of these a little bit. The way they are right now, they're designed to go right in line after your mid-pipe. Bit in all honesty, you do have a little bit of room to play around with these and put them in other areas like right after your headers or further down the exhaust. I've also seen some guys cut the Y-pipe and just weld the housing section onto their mid-pipe. The only thing I will say here is that Pypes does have some strict guidelines if you want to keep the warranty, but they are all laid out on the install instructions. So if you're interested in keeping that warranty, just take note of that. Pypes does make what they call an X-change X-pipe that's specifically designed to work with these cutouts, if that's something you might be interested in. No matter where you position the kit, the valve opening should always point towards the rear of the car and away from anything that can be melted. When you're looking at your wiring harness routing, just be sure to keep the wiring away from the actual exhaust system and all moving parts like the steering shaft and brake pedal shaft. You'll also have to find a location to mount the switch, which will be connected to the female weatherpack connector and the wiring harness. Just add 12 volts, and decide which position you want open to be. After that, it's just a matter of simple wiring and grounding. You can surely extend wires here if you need to or if you want to go directly to the negative battery terminal, but just make sure that everything's properly powered. There is some care involved with the cutouts if you want to make sure that they have a nice long life. Pypes suggests regularly removing and cleaning them in a mild solvent, as well as giving them some WD-40 just to keep everything moving and not binding up. You should also keep an eye on the wiring just to make sure it stays looking healthy and doesn't have any rubs or loose sections. Lastly, guys, it kind of goes without saying here, but these may not be exactly street legal in all areas, especially areas with strict emissions, so just be mindful of that. To summarize everything that I just said about the install, it's not a difficult one, but it does require some expertise. It's not a bad idea to take this to a shop for the install, especially if you're considering modifying these in some way. If you do take this on yourself, you're probably looking at a few hours to get it all done. I'll call this one a two out of three wrenches on the scale, just because you will need a little bit of both mechanical and wiring knowledge for this one here. Okay, wrapping things up here, the Pypes electric exhaust cutout kit is great for anyone that like their Mustang to be tame when they need it to be and loud when The Man isn't watching or listening. The cutouts work off of a switch that's wired into the cabin for driver control. You can work it into your exhaust system in the mid-pipe area. You can check this kit out more online for yourself. And for all things Mustang, keep it right here at

      Product Information

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


      • Unleash Your Exhaust with a Flip of a Switch
      • Take Your Exhaust Note from Stealth to Screaming Instantly
      • Built in Thermal Protection Device
      • Includes Two 2.5" Y Pipes
      • Also Compatible with Any Pypes 2.5" or 3" Pipe
      • Manufacturer's Limited Lifetime Warranty


      Flip a Switch. This electric cutout exhaust kit from Pypes will give you the flexibility to switch from a restricted exhaust to a wide open one with the flip of a switch. This kit is far superior to the others on the market, offering better manufacturing, materials, and higher quality components. With the flip of a switch, the included wiring harness allows you to control both cutouts, switching from stealth to screaming in the blink of an eye.

      Quality Construction. A CNC machined, polished billet aluminum housing insures a precise fit with the Y pipe, and a double butterfly seal with an o-ring insures leak-free performance. It also features a built in thermal protection device to prevent damage due to engine overload. With stainless steel fittings, hardware and weather-tight exterior connectors, these Pypes exhaust cutouts are guaranteed to last. In fact, Pypes is so confident that these are the highest quality cutouts on the market, they back them with a limited lifetime warranty.

      Complete Kit.
      This complete kit includes two 2.5" Y pipes, 2 cutouts, zinc plated mounting hardware, extra thick gaskets, and wiring harness. Unlike our competitors, who expect you to purchase a Y pipe separately, this complete kit includes Y pipes with a 3" flange for ease of installation.

      Application. This Pypes Dual Electric Cutout and Y-pipe Kit is designed for 1979 to 2020 Mustangs equipped with 2.5" diameter Mid Pipe exhaust piping.

      NOTE: This system may not be street legal in all areas. Please check your local laws.

      Fitment: 1979 1980 1981 1982 1983 1984 1985 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 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

      Pypes HVE10K

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (42)

      Write a Review

      Ratings Summary

      3.8 out of 5 overall rating from 42 customers

      Installation Time: Full Day

      Installation Cost: $100-$250

      • May 19, 2020

        1 1999 Cobra - Stangracer44t Installation Time: Weekend

        DO NOT BUY

        These required a lot of time and custom work to install. They sound great when open, but do NOT stay completely closed and rattle terribly! From everything ive read, i can either return them to Pypes and pay for shipping, and reinstall new ones, or have more work done to take them completely off. STAY AWAY!

        Helpful (0)
      • April 30, 2020

        2 2017 GT - CalebJ

        Placement issues

        They were welded right behind the cats and hung very low. I scraped on most speed bumps and now one stopped working.

        Helpful (3)
      • June 22, 2019

        5 2014 GT - Andrew Installation Time: Shop Install Installation Cost: $1000+

        Make some noise!

        I wanted my car to go from stealth to making your ears ring, and these did it! I got these installed with Long Tubes as well and with stock exhaust after the mid-pipe the car’s quiet. These were placed after my headers and it’s ridiculous how I can be quietly coasting around town and suddenly be screaming! The downshifts are stupid loud and have to be done in moderation, cause they sound like gunshots...

        Helpful (8)
      • January 13, 2019

        5 2014 GT - BradH

        Nice fit!

        Works Great! Gives a deeper throatier sound with the cutouts open!

        Helpful (9)
      • December 29, 2018

        1 2004 GT - DavidS Installation Time: Full Day

        Bad product!!!

        Had high hopes for these when purchased since the price was higher than most I thought they would be a quality product. Switch burned out in less than two weeks of barely using it. Then the cutouts began to rattle with less than 200 miles on them. I took them off and found that the housing had chewed itself up and would not seal. It took almost a month to get pypes to take them back and fix it. They sent a new set only to have them rattle like something is about to fall off within 200 miles again. Would not recommend to any one. Thoroughly disappointed. Had nothing to do with AM and their outstanding costumer service!

        Helpful (17)
      • October 08, 2018

        1 2011 V6 - SakolM Installation Time: Full Day

        Bang TO your Buck! Ouch!

        I purchased kit for my '11 stang. I paid $300 to have it professionally installed with welding. In less than 3 months, the switch got really hot and burned out. Spent another $100 to replace/install new switch. 6 months later, I hear loud rattling. Paid $100 to take off cutouts to send back to have it repaired. Parts are covered, but I was told I was responsible for paying for the shipping. Result: Pypes said it just needed cleaning and returned the cutouts. Paid another $100 to re-install. Once installed, it still made the rattling sound. Now the rattling is even louder. Rather than deal with paying more money to uninstall and ship it back, i just leave it open to avoid that rattling sound. What a joke.

        Helpful (12)
      • October 05, 2018

        1 2003 GT - GtHog88

        Loud when open, rattle when closed

        This is the one regret I have as far as mods go. When open they are pretty loud, not as loud as you would expect with headers as well but loud. That is about as far as the good goes. I've had to replace a switch once and now one of the cutouts rattles when closed so loud it makes my car sound terrible. Hoping to hear back from Pypes soon about replacing. Will probably just go back to an x-pipe and be done with it.

        Helpful (14)
      • August 31, 2018

        2 2014 V6 - LeapinLizzard

        Poor QA and Service Response

        The internal switch is VERY bad. Burn out. Contacted Pypes first time for replacement and get them - they burned out. Contacted Pypes twice after to say I would be happy to pay for replacements - no response. Will not buy anything from Pypes again. Going with Hooker. Sorry AM, you don't stock them.

        Helpful (10)
      • July 07, 2018

        1 2013 GT500 - RichardS

        Does not fit 13 gt500

        Exhaust size on the 13 gt500 is 2.75. Had mine wired up and brought to exhaust shop to be installed. The 2.5 inch y adapter is way undersized around 2.25 and at the large flare end measures 2.5. I bought this kit to clamp in didn’t want to weld. Also only comes with 2 clamps.

        Helpful (10)
      • June 08, 2018

        5 2006 GT - Drew Installation Time: Afternoon


        Sounds amazing with the Hod rod cams! Don’t get ripped off on the install though. A lot of shops will do the welding work for around 100 bucks. Wiring is fairly easy by yourself. Very happy with these on the car.

        Helpful (10)

      Questions & Answers (65 answers)

      5 Top Rated Questions

      Pypes cutout kit I have an 89 Mustang GT with BBK shorty headers with an X-Pipe. I tried a Dougs cutout kit and it was just to big. There was just no way to install the electric section of the cut outs. Will this system fit for sure. I don't want to buy and just have to send another one back. Thank you for the help. Lonnie

      • As long as the piping on your stang is 2.5" you'll be fine.

      Helpful (5) Show 4 more answers

      Will exhaust gases heat up the under side of the vehicle? Is it a good idea to put 3" down pipes to divert the heat away? Maybe a heat shield panel? I drive a Mustang GT 2013. I'm just afraid of the heat build up underneath my car.

      • The Pypes Electric Exhaust Cutout Kit should not cause excessive heat buildup, especially while moving, however it is a good idea to install a turn down tip to allow the exhaust gases to move away from the body of the car.

      Helpful (4)

      Can these be used with the Boss side exhaust kit? Can these cutouts be used in addition to the Boss 302 side exhaust kit? If so, will they cause trips in the O2 sensors?

      • The Pypes Electric Exhaust Cutout Kit will essentially work on any exhaust, as long as there is sufficient clearance where you plan to mount the cut outs. As long as there is clearance in your choice of location from scraping, wiring or any sensitive component, this will work well.

      Helpful (4)

      possible trouble code activation by using this cut out system will the of free flow exhaust (bypassing the cat converter) signal an engine problem to the cars computer thus tripping a check engine light

      • It shouldn't trip a check engine light because 1. The cutout just routes most of the gases out of it, some will still go past the second sensor. 2. The cutouts should only be open when at the track.

      Helpful (4) Show 3 more answers

      X pipe? will this fit on the pypes mid-muffler conversion for the V-6, which has an X-pipe. so is this only for Y pipes or will it fit X-pipes?

      • electric cutouts can be placed almost any where on an exhaust system as long as there's enough room for the pipe to be installed. they should be able to install after the x-pipe of your exhaust

      Helpful (4) Show 4 more answers
      10 More Questions
      Hello just wondering if this toggle switch for this kit need to be held up to open the valves and then held closed to close them. For the set up I want I want to just flick the switch up and leave it and when I want them closed I can just flick it off like a light switch, 1 answer
      tune using these will screw up a tune when opened ?? 3 answers
      Do I need to run a custom tune when open? 0 answer
      Do you need to weld these in, or can you just clamp them? The customer pictures show welds but the exhaust comes with 2 clamps. 1 answer
      I’ve had these for a while but suddenly they decided they don’t wanna open all the way and one doesnt even open, could it just be build up from the exhaust and needs cleaning or could it be the switch or is it the motor 1 answer
      Will I be able to use this cutout to dump straight from the headers? 1 answer
      Had these on for 5 days the switch is burned out. What can I do to replace it 1 answer
      Will these fit on my 2014 v6 mustang? just asking because i thought mine had the 2.25 inch midpipe but this says it fits all 1 answer
      Can this be done for borla xr1 headers/s type catback 1 answer
      i have a 98’ gt and i was wondering if these fit before the mid pipe, i was planning on putting them on just after my headers so i can get a nice straight pipe sound. thank you! 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) 2.5" Y-Pipes
      • (2) Cutouts
      • (2) Extra Thick Gaskets
      • Wiring Harness
      • Mounting Hardware

      Tech Specs

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