This is a Complete Honda Ruckus / Metropolitan Ported Cylinder Head. No core is required to send in. The core charge is already built into this listing. If you are interested in sending us your cylinder head please send us a message. What you will receive in the box. Complete Ported Cylinder Head (Completely Assembled). Modified Intake and Exhaust Valves (Assembled). Valve Springs, Retainers, Seats and Keepers (Assembled). Increase the flow of your cylinder head for more power and torque. We offer porting suited to whatever type of riding you prefer. Included in this service is the following:- Remove Valves/Springs- Clean Carbon from Valves- Beadblast Combustion Chamber- Port / Flow…