An engine&rsquos camshafts must be set at their proper positions relative to the crankshaft in order to maximize horsepower. Pro Series Cam Gears for Honda's B16/ B17/ B18/ B20 and H23A 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. Skunk2&rsquos lightweight design (35 percent lighter than OEM) and CNC-machined, 7075-T6 billet aluminum construction reduces rotational inertia, resulting in increased engine response and acceleration. Skunk2&rsquos adjustable cam gears have also been proven on race cars in the most extreme conditions for more than a decade. 1990 - 2001 Acura Integra (GS, GS-R, LS, Type R) 1992 - 1996 Honda Prelude (Si) 1999 - 2000 Honda Civic (Si) 1994 - 1997 Honda Civic del Sol (VTEC) Add Skunk2 Tuner Series or Pro Series Camshafts for the ultimate power increase.