BC only accepts new, never-been ran Can-Am X3 (#420413362) cylinder heads as new core exchanges. BC uses only new heads for all new even exchanges. All heads come with BC bronze valve guides installed as well as +1mm Stainless Steel intake/+1mm Inconel exhaust valves. Any valve springs, retainers, keepers, cams or ARP head studs or cam girdle bolt kits are sold separately in the pulldown menus.
If sending a new head, allow 1 week for inspection before new CNC head ships. If sending a used head, allow 4-8 weeks for that head to be ported. No exchanges on used heads.