short pipes:

K&N Filter part # No. RC-2900 and RC-2890- there is a left and a right, but I would highly suggest getting a kit. You do not want to remove the whole thing. Part of it blocks debris from the rear tire, part holds the electrical, part holds the side cover one, part holds the cheese graters, part ...
the AI stops the backfiring and the blueing. Modify the intake o the exhaust, and you need to pitch the AI Actually, if you buy the bike you need to pitch the AI ;-).