Brand New K&N style ATV Air Filter
Pleated element style for more air flow
More power and acceleration
Washable and re-usable
Inner opening diameter is 4 3/8"
Filter is approx 6 3/4" long
Fits the Yamaha ATV 4 stroke models listed below:
2004 - 2009 Yamaha YFZ450
2009 - Current Yamaha YFZ450R
2010 - 2011 Yamaha YFZ450X
The corresponding K&N part number is RU-4740, and this filter fits everything that this filter fits
This WILL fit inside the factory airbox with the PRO FLOW ring!
It needs the Pro Flo adapter ring to mount properly. It does not use the factory cage and mounting stud
THIS FILTER IS NOT AN OEM REPLACEMENT AND WILL ONLY WORK WITH AN AFTER MARKET BILLET PRO FLOW INTAKE RING or INTAKE