Replace Toyota Supra Top Radiator Hose. Shop Toyota Supra Upper Radiator Hoses Replacement & Toyota Supra Upper Radiator Hoses. Maintaining the upper radiator hose in your Toyota Supra is crucial for engine health, as it ensures proper coolant flow and prevents overheating. Regular inspection for soft spots, cracks, and leaks can extend its lifespan and signal when replacement is due. When selecting a new hose, opt for high-quality materials like reinforced silicone for durability and enhanced heat resistance, ensuring a perfect fit for your Supra model. During installation, ensure the clamps are secure but not overtightened, to avoid damage. By investing in the right upper radiator hose, you not only safeguard your Supra's performance but also maximize efficiency, keeping your vehicle in prime condition for the road ahead.