The Stoney Racing Brake Server Booster Hose replaces the stock rubber hose between the intake manifold and the brake booster. Made from 4.5mm 4 ply polyester-reinforced silicone, this hose is the perfect hose to compliment silicone coolant hose and vacuum line kits. Each hose is supplied with a one-way check valve to ensure the brake servo works as intended. Please note: This part fits MX-5 NB 01-05 1.8 cars only. Features 4.5mm 4ply silicone Polyester reinforced Operating temperature -50?c to 180?c RHD only