This Polaris 700 twin 5131824 Liberty big-block non-VES cylinder is reconditioned with a lifetime plating warranty by the plating company. This is the one with the 6 bolt holes for the head itself without 4 bolt holes on the outside corners as some have. There is no core exchange required. There may be some porosity visible in the plating, but it doesn't affect performance or longevity. Shipping is only in the lower 48; unless you are purchasing through eBay's Global Shipping Program. If you are in Alaska please contact me before purchasing to check on shipping options. Thanks, -Paul