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.