Before fitting triple k&n's it would be better if the exhaust was freed up first, the old adage of getting the gasses out faster allowing more air and fuel to be introduced, removing and fitting a cat bypass would be the first mod, followed by three K&n's, the RU-2780's are a tight squeeze but they make it.The bearclaw can be fitted without cutting by simply angling the back filter to the two o'clock position, you can also pack out the bearclaw slightly by placing a washer behind the top locating bracket. You dont have to remove the secondaries if you dont want..... Miami Dave has a how to, do a search if you need any more help. :wink: