b'TUNNEL REINFORCEMENT KITRecommended when carrying fuel or heavy loads. TWIN RAIL BRACE KIT Includes internal tunnel braces and hardware.Provides alignment holes for mounting Arctic Cat Tunnel Racks Upgrade your twin-rail M suspension with full-length Hardcoreand Mountain Addiction Rails.braces for outstanding durabilityTotal weight 7.5 lbs 8639-210 | \' 14-\'24 M 153-154"; \'20-\'24 Riot; \'20 Riot X; \'17-\'19 XF High Country 153"Includes braces, hardware, and instructions(Except \'24 600)8639-211 | \'14-\'24 M, King Cat 162-165"8639-170 BLACK | \'17-\'19 M 153".8639-171 ALUMINUM | (Same application as 8639-170) 7639-147 ALUMINUM | \'16 M 153"TETHER SWITCHStops engine in the event you fall off your sledAttaches to your jacket D-ringALPHA ONE REAR ARM BOLT KIT 8639-074 | \'18 ZR, M, XF, Norseman 6/8000; \'17 ZR 6000 RSBEST SELLERSuspension upgrade for improved durability in harsh conditions 8639-075 | 18 ZR, M, XF 9000Replaces two M6 cap screws with a through-bolt and lock nut5639-859 | 14-17 6/8000; 12-13 800BEST SELLER0637-535 | \'19-\'20 M ALPHA ONE 154-165" 5639-860 | 14-17 5/9000; 14-18 7000; 16-18 3000; 12-13 1100/1100T48Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. This WARNING applies to all items that can be ordered on this page.'