One of the biggest issues with older BMWs is the degradation of rubber hoses under the hood. Combine that with the lackluster reliability with older cooling systems and you could have a nightmare on the street or the track. If you do any sort of performance driving, or just want to upgrade to something that will last, then look no further. This complete silicone cooling hose kit for the E28 is made from a triple layer, high grade silicone and Dupont Nomex to provide more efficient heat reduction, increased pressure tolerance, and prevent any degrading over time. This kit comes with everything you need for a M20 cylinder engine.Specifications: Interior Material: Nomex Exterior Color: Black Exterior Material: Silicone Max Temperature: 330 F *This kit is made for OEM components. We can not guarantee fitment on aftermarket radiators**New hose clamps are included in this kitFitment: E28 525i (m20b25), 528e (late model etas only), 535i, 533i, 635i, 633iKit replaces the following OEM part numbers (M20)Lower Radiator Hose - 11531278045Water Pump to Thermostat Housing - 11531287651Upper Radiator Hose - 11531287682Return Hose - 11531277887Lower Thermostat Housing Hose/TB Heater - 13541719966TB Heater/Housing - 13541289976Expansion Tank Hose - 11531287999Kit replaces the following OEM part numbers (M30)Thermostat Housing to Radiator / Lower Hose - 11531289859Thermostat to Upper Radiator Hose - 11531276647Thermostat Housing to Water Pump - 11531266459Under Intake Manifold to Plenum - 11531274210To Coolant Reservoir - 11531278529Inlet at Firewall/Heater Valve - 64211368714Inlet Hose to Heater Core - 64211363470Return Hose to Heater Core - 64211368715