I've had the ****** on my bike for about a year now and I've swapped the systems between my bikes because its awesome. I wouldn't run a stock system ever again. No more rim grease, no more paper towels in the driveway. Dirt doesn't fall into the intake boot when you take it out because you can manipulate the filter between the subframe to get it out. The "smaller" opening in the adapter plate is actually more surface area than the stock system or any other after market system offered. Plus, Ive never found any dirt in my intake and I can change my filter in under two minutes. I've raced both Honda's and Yamaha's with the ****** intake systems on them and they were significantly faster than stock. Everybody thinks I have head work or something. Ashley Fiolek runs it on her DRD race bike, so you know it works. Don't let the website fool you, the guys at ******** make Hp and life easier! Best investment I've made yet.