99-00 Honda Civic Si 90-93 Acura Integra All Models 94-01 Acura Integra RS/LS/GS 94-01 Acura Integra GS-R /TYPE-R All B16 B17 B18 Honda Acura Engines The 5-bolt design eliminates any chance of slippage while the hard-anodized finish prevents premature wear. They allow for fine tune adjustments to cam timing to maximize engine performance, and tailor power characteristics for various driving conditions Gear Spec : 101.70mm OD 29.10MM LENGTH 20H7 BORE 4MM KEYWAY +- 20 DEGRESS