I posted this in Mods but I havent got any answers. Can anyone tell me the difference between the race BMC filter and the stock replacement which would be better for my bike. I have a 2k with small air box mod Two Brothers 4-2-1 exhaust moved my air temp sensor to the ram air tube Ram Air seals and a PCII. I have the basic map for my mods and I am going to tune it on the dyno. As I understand it the BMC is better than the K&N but I see to different types. Also I am looking for an adjustable TRE (ATRE) so I can derestrict only the gears I want.