I bought a used blaster about two weeks ago. I started ordering parts for it. It needed an air filter so i bought a stock OEM filter cause the dealer had it there. I then noticed that there should be a plastic shroud or something that fits around the filter that looks like it screw through the top hole in the filter and secures it to the filter box. Does anyone know what this is called or the part number so i can order one. Its a stock 1989 blaster with original filter box and stock filter. Thanks in advance. Matt.