AEM Tru-Time Adjustable Cam Gears increase horsepower and torque without having to change the camshaft(s). Having the ability to be adjusted makes these a must-have item for engines that are milled, using forced induction, high compression or utilizing aftermarket competition camshafts. Tru-Time cam gears enable users to match cam timing with their vehicle's current tune by advancing or retarding the cam profile in one-degree increments via true laser-etched markings. Precision-cut gear teeth ensure no premature wearing of the cam gear's belt surface and AEM's anodizing on the adjustable cam gear's teeth is lab-test proven as the hardest anodizing process on the market. AEM Tru-Time Adjustable Cam Gears are available in a multi-spoke, five-bolt designs.