WESTCOAST SAW AIR FILTER SYSTEM FITS STIHL MS400 MS391 MS362C MS291 HUSQVARNA 125BX Stihl Newer Models FS 55 Stihl Newer Models FS 55 R FS 56 FS 70 FS 85 FS 100 RX FS 110 FS 110 R FS 61 FS 80 FS 90 FS 91 FS 91 R FS 130 FS 310 FS 360 FS 200 FS 240 FS 550 FS 560 C Older Models FS 50 E FS 51 FS60 FS 65 AVE FS 80 E FS 86 FS 61 E FS 96 FS 106 FS 90 AVE FS 50 F FS 61 AE FS 656 AVRE FS 85 R RT FS 83 R RT FS 50 F FS 55 RC FS 55 C FR 106 FR 108 FS 44 FS 48 FS 52 AVR FS 56 AVRE FS 62 FS 66 AVRE FS 74 FS 76 FS 81 AVRE FS 86 AVRE FS 88 FS 96 AVE FS 106AVE FS 108 FS 40 FS 44J FS 44 R FS 52 AVE FS 66 AVE FS 74 AVE AVRE COVER EBZ8550 RedMax Your kit will include installation directions please read these thoroughly The Air Cleaner System will fit under your stock hood