An engine*s camshafts must be set at their proper positions relative to the crankshaft in order to maximize horsepower. Pro Series Cam Gears for Hondas H-series & F-Series VTEC engines enable serious tuners to optimize horsepower and torque by being able to adjust camshaft timing +/- 10 degrees, in one-degree increments, allowing them to tailor the power curve appropriately. Thanks to laser-etched timing and directional marks, precise camshaft adjustments can be made quickly and easily. Pro Series Cam Gears feature precision-machined, hard-anodized teeth to reduce premature wear with a signature, six-bolt design that eliminates gear slipping.