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  1. Passing emissions with Long tube headers and high flowing cats

    General Mustang Discussion
    I installed bbk long tube headers with high flowing cats and I cant seem to pass Illinois state emissions! My mechanic cant seem to figure out why because when he connects his machine it doesn't give him any codes and my check engine light doesn't come on. Does anyone know what it could be or if...
  2. Straight pipe with cat delete

    2011-2014 Mustang GT
    I got a 2014 gt and straight as straight gets with straight piping. I’m honestly tired of it and want to tone it down a little bit but still would like to piss off my neighbors lol. would you suggest putting the resonator back on? Mufflers? Or whole new exhaust?
  3. “Mystery Mufflers” vs. Roush Axle Backs - Comparison

    2011-2014 Mustang GT
    I picked up these axle backs second hand a few months back. Nobody really seemed to know where they came from (seller wasn’t sure either) so I’ve started calling them the “mystery mufflers”. This got them installed on my 2014 GT and made a video of the install and a sound comparison between...
  4. 2011-2014 Mustang V6 Lethal Performance Downpipes (Cat Delete) For Sale

    Mustang Parts for Sale and Wanted
    S197 v6 catless lethal performance downpipes for sale. I don’t want them. Name your price and I’ll ship em to ya! It was a catless h pipe but I had the h part cut off and welded.
  5. Axle back exhaust question

    2011-2014 Mustang GT
    Hey guys, i currently have a Roush cat back on my 2013 GT but I really want to go quad tips as it is my favorite look for the back end of the S197. My question is, does any one happen to know that if i get the SVE or Corsa axle backs if they will bolt up to the rest of my Roush system? Judging...
  6. '15-'17 GT Active Exhaust with GT350 Tips & Valance

    2011-2014 Mustang GT
    While browsing the Ford Racing web site, looking for headers for my '17 GT, I found this. (Never did find any headers.) 2015-2017 MUSTANG GT 5.0L CAT BACK ACTIVE EXHAUST SYSTEM KIT WITH GT350 EXHAUST TIPS & LOWER VALANCE I want this! I NEED...
  7. Wanted: 2010-2014 OEM/aftermarket catback exhaust

    Mustang Parts for Sale and Wanted
    I'm trying to fix a mistake the last owner of my car (2011 V6) made and refit it as close to stock as possible. I'm looking to purchase something reasonably close to but preferably the OEM catalytic converters and mid-section piping. I'm open to just the catalytics or the whole exhaust...
  8. Exhaust

    1996-2004 Mustang GT
    Okay, im new to the site but not new to cars. I just recently purchased a manual 2004 mustang GT with 62K on it roughly now. The thing im trying to do with my exhaust is experience that crackle when the engine dies down but for some reason cant get it to do anything. Its just bland high revs and...
  9. Exhaust rattle from 3-4k RPM (catless)?

    2011-2014 V6 Mustang
    I'm trying to get my 2011 V6 back to normal after the last owner did one hell of a number on it (deleted the catalytics and put larger mufflers on it... and piped it with dryer tubing). Needless to say I was pissed but I bought it on short notice so I accept that I got shafted. Anyways, I'm...
  10. Califorina Exhaust Laws :(

    2005-2010 Mustang GT
    Hey there, I currently own a 2008 GT Mustang and I was wondering if anyone knows if theres any exhaust out there that passes Califorina's 95 decible law? I had a flomaster but had to take that off due to the new laws because it was extremely loud. I was hoping to find an exhaust that allows me...
  11. Exhaust pipe separated

    2011-2014 V6 Mustang
    So my daughter came home on her '11 V6 with exhaust pipe detached. I didn't get under the car yet, but I would guess that I just need to stuff pipe back in and reconnect, right? Do I need any parts/connectors? Thanks, Vadim
  12. Straight Pipe exhaust

    2011-2014 Mustang GT
    I have a 2014 GT and I've been told that straight piping is bad for the car. I understand that you lose back pressure, but will it cause any issues in the long run? And what are the cons of straight piping? I had a '06 charger r/t that was straight piped and never really gave me any issues. But...
  13. Buzzing/Rattling Exhaust Cause KR?

    2011-2014 V6 Mustang
    I’m curious if this is a sign of a cat going bad. I have been smelling a slightly stronger oder from the exhaust... not a rotten egg smell. There are engine codes showing. But I have also been getting KR as high as +5 in part throttle and at wide open throttle, both on stock spark tune and MPT...
  14. Anyone know a source for stainless 3.7l exhaust flanges?

    2011-2014 V6 Mustang
    I am needing to build a set of my own headers to fit the chassis I am working with...just wondering if anyone knew any sources? I inquired at Morana racing and never got any reply(besides, the pictures he has on his website look more like blue anodized aluminum than stainless...and the ports he...
  15. Exhaust nightmares

    2011-2014 Mustang GT
    Got myself a cheap set of MBRP Axle backs , open box $140 , thought I scored a great deal , since I still have the stock exhaust on my GT , thought I'd give it a little rumble , nothing to loud anyway install time , should be quick , right/ WRONG , the mufflers are seized onto the stock pipes...
  16. Gt500 stock exhaust

    Shelby Mustang
    Does anybody know where I can buy the 2014 GT500's oem mufflers. There are some websites that have them, but with the valance. Wanted to know if anyone knew where I could get the mufflers alone, I dont mind if they are used. Sent from my iPhone using Mustang Evolution
  17. Any1 have kooks headers and borla, flowmaster outlaws or rtr exhaust?

    2011-2014 Mustang GT
    I am just about to get a 2012 GT. Finally upgrading from my 12 v6. I already got kooks 1 3/4 headers and kooks catted h pipe. I am trying to decide between borla type s, borla ataks, flowmaster outlaws or rtr competition spec axle backs. Anyone have kooks headers with any of those exhaust above...
  18. Louder Exhaust

    2011-2014 V6 Mustang
    Besides replacing, is there any way to get more loudness out of a Corsa Sport Performance Exhaust system?
  19. Standard Exhaust on 2012 Premium

    2011-2014 V6 Mustang
    Does anyone know what the Standard Stainless Steel dual exhaust on a 2012 Premium convertible are worth and where to sell? I replaced mine with Corsa. Thanks
  20. Wanted: WTB - Pypes Muffler-Delete Axle-Back Exhaust for my 2006 GT

    Mustang Parts for Sale and Wanted
    Hi Looking for a set of Pypes Muffler-Delete Axle-Back Exhaust for my 2006 GT like photo. I am in New Zealand but there is a warehouse in the States (ZIP 97203) they can be sent to and they will ship to me. Thanks Paul