Silicone Exhaust Sleeve to connect the front and rear pipes. See Specification for more info. SILICONE EXHAUST SLEEVE RED 70MM LENGTH 29MM-30MM INSIDE DIAMETER GAS GAS ENDURO EC250 21-23 EC300 21-23 GAS GAS XC EX250 22-33 EX300 21-23 KTM 250 SX 17-22 250 EXC 17-18 300 EXC 17-18 250 EXC TPI 18-22 300 EXC TPI 18-22 HUSQVARNA TC 250 17-22 TE 250 17-18 TE 300 17-18 TE 250I 18-22 TE 300I 18-22 TX 300 17-19 TX 300I 20-22