The Ford OEM Focus ST cylinder head is a Ford Genuine Part directly from Ford. This is not an aftermarket component. The cylinder head for the Focus ST comes complete with all head components except for the camshafts, which are generally reusable from the head it replaces. Otherwise, the camshafts are available separately. Cam caps, valves, springs, and retainers are all included and preassembled in the head. Normally, there is a core charge of $250 in addition to the price of the part. We do not accept core returns. The price of this item includes the core charge and will not be returned.