The Cylinder Exchange Program gives you a complete top-end for your engine, ready to bolt on. If your sleeve(s) is damaged or your current bore is beyond the max service limit - don't worry, we resleeve at no-charge. It also includes cylinders, all new SBT pistons, rings, wrist pins, wrist-pin bearings, c-clips, base gaskets, head/head cover gaskets/o-rings, intake and exhaust gaskets. Rebuildable core cylinders required for exchange. Visit the Program Description for further details. Kit does not include Power Valves Additional purchase of Power valve rebuild kits lever links are recommended. Please call SBT for shipping rates At this time the item you are selecting is sold on a cores first basis, please refer to our Program Description on sending the correct components to SBT. The lead time average for turn around is approximately 20-25 business days. Once SBT receives the core, this core has entered the remanufacturing process and cannot be returned.