Eyes decieve....yes Keihin FCR Flatslides, but on the air filter.... I cut the perferated metal surround by about 3/8" and found a shorter K&N filter, but I also applied some tricks on the manifold side. About 1/8" off of the end of each manifold and using spigots from Sudco for a Yamaha Raptor instead of the ones supplied with the "off the shelf" kit (that gave another .25" off the length). I also used my own rubber connector. That gave me a total of about a 1/2" shorter runner length (we'll se how that translates into any noticable performance offset). After everything installed, I probably could have gotten away with the standard thickness air filter and perferated surround. Plenty of room to r & r the filter.