I’m running borla atak and my god is it amazing. Loud on the start up but really hushes up once it warms up but when you get on it forget about it. If you’re driving through a neighborhood you’re gonna piss some people off. Down side is though you’ll be at the speed limit before you can really enjoy the sound XD. Downsides of having a fast car I guess. I paid maybe around 1700 in total. Buying, shipping, installing. However I’m probably going to just go full straight pipe soon cause well there’s no such thing as “too loud”.