I have it in my 03' (check the sig). It fits fine. All of the accesories and brackets it comes with hold it in place really tight. Some intakes rub a hole in the side where it goes under the battery. I check mine out about once a month and it barely has a scuff mark on it. I've been a K&N fanboy for years, so that's why I went with the Typhoon. Not that the others are sub quality. I think you get the same end result with just about any CAI. The chepaer ones will rust and sometimes the filter doesn't last long. The K&N has a reusable filter as well as a dry sock that helps prevent hydrolocking. Notice I said "helps", not "prevents". The K&N is a good choice. I think most people avoid it because it's generally more expensive than most.