This Arctic Cat 900 twin cylinder with the casting number 88J4 is re-plated to stock specs with a lifetime plating warranty by the plating company. There may be slight porosity in the plating, which is common on the remans, but doesn't affect longevity or performance. A core charge of $100 has been included in the purchase price of this cylinder. We will send a core refund once we receive your eligible core cylinder. Broken skirts or significant casting damage (such as cracks into the water jacket) may not be eligible for core refund. We do not accept core cylinders that have been sleeved (iron liners installed). Please contact us if you have any questions about your cylinder or if your casting number does not match this cylinder. 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