I have weapon R intake and it sounds bad ass and it helps so so much but i think just about any intake is going to help when it comes down to it. I do recall however that somebody did a dyno with a filter that had the end open and it actually cause more turblance then with out the end open so you might want to think about getting a filter that doesnt have the open end. it only adds like 1hp but that is still a lot if you think about it