BLOX RACING ADJ. CAM GEARS, HONDA B16A-B; B17A; B18A-C; H23A (PAIR)BLOX Racing adjustable cam gears are manufactured using high quality billet AL6061 and CNC machined to precise tolerances and are ideal for tuners wanting to optimize the engines RPM powerband. The precision machined and hard anodized cam gear teeth ensure maximum durability, reliability and minimize premature wear. The laser etched timing marks are clearly visible and aid the tuner to properly advance or retard the camshaft timing. Each timing mark