Ok for my 02 ZX6R, and its a toss up between Factory Pro and Ivans, now Factory claims 98hp but I think its without exhaust and Ivans is claiming like 105hp but with Ack. exhaust. I dunno the price is 120 for ivans vs 180 for factoy and if its better then I really dont mind droping an extra 40. Thoughts, ideas, comments, concers? After this im getting is Dyno tuned in and im not putting the kit in myself so there should be no worries.