GReddy high power timing belt adopts special technic for making tooth cloth that no stress is applied to the closs to fit to specified shape for each engine.And the tooth rubber is made from high saturation H-NBR so it prevent to change form. It absorbs stress to the belt and also can drive cam pulley by high force, it can maintain correct valve timing for a long time. Engineered to increase heat-resistance, flexibility and durability, GReddy Extreme Timing Belts reduce the chances of cracking from heat, inconsistent timing from stretching and skipping or snapping. Improvements in materials and construction lead to a more reliable belt that will be more consistent and last longer.