HKS adjustable cam gears allow independent fine-tuning of each camshaft to maximize engine performance and to customize the power characteristics for each engine setup.   These cam gears can be used with OEM or aftermarket cams.  HKS adjustable cam gears are made of anodized duralumin with nickle plage gear teeth (except for applications with timing chains, which utilize an aluminum slide with steel teeth).

Direct drop-in for S13 SR20DET motors.  It can also be used on S14/S15 motors, bypassing the VTC by using the S13 intake camshaft bolt.