The Samix Cobra GT 3.0 Steel Vented 2-Speed Clutch Bell combines a vented design with hardened steel to create a clutch bell that is light weight and durable. This can be used in any application that is compatible with SER600878 or SER600586. Plus, a through hole allows easy and solid pinion gear installation/removal by installing a driver through the holes so the clutch bell can be held securely.