6500 is way good I payed about 7200 for mine dealer said it was his cost but you know how to tell if a salesmen is lying right?....his lips are moving. An Arai might fit you better. Shois are great for rounder heads, arai for more oval heads.
I have pcv installed it about a week ago as well as R77 yosh K&N air filter and block off plates. I've been playing around with some maps i found online but cant seem to get rid of a hesitation around 5500 rpm. Think it is a little better as of last night about to go on a little test ride.