The Toyota Supra timing belts help keep the combustion timing exact while the engine is running at maximum. It is connected directly on to the camshaft and crank shaft. Timing belts materials range from rubber with high-tensile fibers, highly-saturated nitrile, and even metal. Without timing belts, untimed movements of the engine gears and piston can cause major damages. The Toyota Supra timing belts regulate proper synchronization between the revolution per crankshafts and the camshafts. Engine running with rubberized timing belts should change every 60,000 miles to ensure proper engine combustion.