EPS Air Filter Kit (Stihl 500 & 661) barkbox Updated polyurethane lid design that

Updated polyurethane lid design that fits tight around the shaft and compresses the factory foam bush for an improved seal

and lower engine temperatures

Exceptional engine protection

Compatible with most spark plugs

EPS Air Filter Kit (Stihl 500 & 661) barkbox Updated polyurethane lid design thatThis air filter kit includes one filter cage and one pre oiled Filter as well as one o ring that fits around the knob that secures the cover to the saw. This kit is designed to fit under the OEM air filter cover on Stihl models 500 and 661. Testing has shown that the Foam Filter does a better job of filtering out fine particulates than the OEM filter, while also improving performance.