I got an AEM in mine (auto), you get more delay and lag down low when u get this fitted, but it sounds and feels better in the higher revs. It's only worth it if your going to plant your foot down alot. It's not hard to install it, I took it to professionals who told me it wasn't made for my car. But I fitted it myself, the hard part is taking off and re attaching the front bar. But I think you could find a way through the mud-guard lining.