FCI's new and improved Power-stack filter! Available for the TRX450R, KFX450R, YFZ450 Carb, YFZ450R, and Raptor 700
Still features FCI's 8 ply construction.
After a year of R&D they were able to come up with this new filter that will give you the increased horsepower gains like our standard 8 ply filter. The top of the Power Stack has additional filter surface area and with this you are able to get increased air flow and a slight horsepower gain over the traditional style filter.
Note-this filter will not fit with the KFX450R Custom Airbox. (It's too wide)