Silicone Coolant Breather Hose Kit fits Mazda Rx8 231 Radiator Stoney Racing December 22, 2023admin Stoney Racing Silicone Coolant & Breather Hose Kit fits Mazda Rx8 231. This high quality reinforced silicone hose kit replaces18 coolant and breather hoses in the engine bay including the main radiator hoses and heater hoses. Share