BMW has a common issue of experiencing cooling problems. One of the key weaknesses, is the weak failure prone rubber hoses. Samco Sport has the answer with these durable silicone hoses. Constructed of high quality silicone, this material can withstand higher temperatures and pressures than the standard rubber. Because of the durability of silicone, you can often find them in motorsport and forced induction applications as well. Kit Includes: Cylinder Head to Heater Core/Valve Lower Radiator to reservoir Heater Valve to Heater Pipe Upper Thermostat Return Pipe to Water Pump Expansion tank relief valve plus several smaller hoses