I'm new to this website, not new to celi's. If you want the best up gains, and even slight mpg gains and a good sound, you could spend hundreds to thousands of dollars on Ted, teddy, Norma, etc. Or you could make your own. It can be a pain, but if you have access to a small pipe bender or buy one cheap, a cutting torch or wheel, a welder and a few beers, it's not difficult to make your own. It's completely custom, much cheaper, I find it fun, it'll teach you a few things, and there is no feeling greater than building your own custom parts instead of buying one and slapping it on. If you just want that mean borla set up, make a replica. Can't go wrong. Good luck man.