SBT Remanufactured Cylinder Head Assembly, including: resurfaced/replaced Valve seals, valves/guides, seals, springs, caps, keeper. The head gasket and valve cover gasket are included. Sold on exchange only, for a complete head core, defined as: Head without head cover, all electronics and sensors. Yamaha Head - included the camshafts, spacers, buckets, and camshaft bridges. Please check shimming on head as shims may have shifted during shipment.