Up for sale is PRO CIRCUIT 2019 KX100 Kawasaki 304 SILENCER. The vendor part number is SK98080-304. Please read the title to know what is for sale The 304 silencer is recommended for most two-stroke applications. The slightly longer body offers reduced noise output when compared to the R-304. The brushed aluminum body, stainless steel inlet tube and end-cap give you a silencer that looks as good as it performs.