Roush 421127 Exhaust Kit

Sound of this exhaust is excellent and aggressive. My car finally sounds the way a 400+ HP car should. I listened to many video clips of different exhausts. This one definitely had best sound for the buck (with no drone). I am very happy with it. Its loud when you want it to be (but not too loud) and quiet enough when you are coasting. Installation took longer than expected on my 2011 Mustang GT. Most comments on web said about 1 hour. Took me 2 1/2 hours. I followed the instructions, but could not slide out the mid-pipe (muffler support bracket bottomed out when sliding back, limiting travel). I ended up loosening the mid-pipe clamp, and then the clamp near the muffler. Was able to remove right side muffler with no problem (little elbow grease). Left side I had to actually remove the muffler hanging bracket (only 3 bolts). Installation was much easier. This would have been a major PITA if I didn't have a hoist. I look forward every time to starting up my car now. :) UPDATE: 2.5 Years later Still loving this exhaust. No issues and sounding great. Beware, if you buy this you may get a lot of random people throwing the love for the beautiful sounds your car makes! :)

I can't emphasize how amazing this exhaust is. I just wanted something to replace my stock on my 2014 Mustang GT. I wanted it to sound like a Mustang. Well when I first fired it up, it made me nervous as it sounded really loud. Well after a week or so I realize it growls when you accelerate and depending on how fast, but it is barely louder than stock at a cruising speed. I haven't been on any long trips yet but I can't see the sound being a problem at all. I have an automatic but I do use the shifting button often and I can keep the sound up if I keep the gears down of course. I love it and would recommend to anyone. I think you can get louder, but around here it would likely get me a ticket if it was louder.

Shipped sooner then showed with purchase 👍 Installed same day as it arrived, was easy install.

Absolutely love this exhaust. Best exhaust you can get for 10-14 mustang gt. Sounds amazing.

Install was a little bit of a pain. Everything fits great and product is great, it's just awkward getting new exhaust onto the 2 hangers that are towards front of car. I left the mid pipes untouched and just pushed them up and out of the way with one hand while I used other hand to place into hangers. Drivers side I unbolted and swung upright sway bar bracket out of the way, but that doesn't work on passenger side. On passenger side I just unbolted the hangers (bottom bolt only), bent down to where I needed to get exhaust on, and bolted back up with exhaust in the hangers. Hope that helps someone. Install took a little over 2 hours, but I could do it in 1 now. Exhaust sounds great. Very pleased with it. Mellow when you're mellow, but loud when you mash the throttle. Quiet when you need it, loud when you want it. Very healthy sound. I have no other exhaust mods besides these. I think any other exhaust mods would ruin the sound. Stand alone, these are fantastic though and would recommend. These are loud, but not overly loud, at all.