Beta 390 RR-S EFI 2017 3 Piece Thermostat Bypass Samco Sport Silicone Coolant Hose Kit. This is a high performance product which replaces your standard factory rubber hoses to a high quality Samco Sport silicone hose kit. Thermostat Bypass hose kits remove the factory fitted thermostat from the cooling system, allowing better coolant flow and lower engine running temperatures. Lifetime Warranty ensuring you have the highest quality cooling products fitted to your motorcycle.