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 STD Stainless Steel intake/STD 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.