Originally Posted by Mysilverz

I would go with either the stillen, which is a tired and proven choice that I personally use on mine, or the z1. These seem to be the best setups making the best power gains. The z1 doesn't require you to cut into the core support and its a bit cheaper. With that being said "cutting" into the core support is easy and it can be covered up if you choose to go back to stock and sell the car later.