H.S.I. B-Pipe 4" Exhaust Coupler

H.S.I. 4.0" Silicone Coupler for exhaust pipes with 4.0" diameter flange and needing 2-1/16" length. Connects the exhaust head pipe to the chamber.  Fits many Factory Pipe Products such as the: 650 Yamaha SuperJet B-Pipe 701 Yamaha SuperJet B-Pipe (both limited and mod) 650 Waverunner III 701  Yamaha FX1 B-Pipe 701 Yamaha Waverunner III 701 Yamaha WB1 B-Pipe (both limited and mod) 701 Yamaha Waveraider 550 Yamaha Limited  650 Kawi SX & X2 (both limited and mod) 750 Kawi XIR 750 Kawi SX/SXi (both limited and mod) 800 Kawi SXR wet pipe High temp and high quality silicone that has been thoroughly tested.  Part Number: HSI-71-0001 (replacement for Factory Pipe COMHOS0100)