{"product_id":"oem-harley-shovelhead-rear-cylinder-jug-16587-66-3-46-in-bore-approx-020","title":"OEM Harley Shovelhead Rear Cylinder Jug 16587-66 – 3.46 in Bore \/ Approx. +.020","description":"\u003cp\u003eGenuine Harley-Davidson Shovelhead rear cylinder jug with casting number 16587-66. The cylinder has a measured bore of approximately 3.46 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePart Number \/ Markings:\u003c\/strong\u003e 16587-66\u003cbr\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Used – machine-shop inspection recommended\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eUSED PARTS DISCLAIMER:\u003c\/strong\u003e This is a used motorcycle part and may show normal signs of age, installation, removal, storage, and previous use including scratches, scuffs, discoloration, surface corrosion, paint loss, or other cosmetic wear. Any known damage or defects are noted when known. Unless otherwise stated, the photos show the actual item being sold and are considered part of the description.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBORE \/ IDENTIFICATION:\u003c\/strong\u003e Measured 3.46 in. Stock 74ci Shovelhead bore is 3.4375 in, making this approximately +.020 in oversize. Machine-shop measurement required before ordering pistons.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFITMENT NOTES:\u003c\/strong\u003e Casting 16587-66 is associated with a Shovelhead rear cylinder. Based on the measured bore, this appears to be a 74ci cylinder bored approximately .020 over standard. Inspect the bore, taper, out-of-round, base flange, head-bolt threads, fins, fire-ring area, and gasket surfaces before use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFITMENT:\u003c\/strong\u003e Buyer is responsible for verifying fitment before purchasing. Fitment information is provided as a reference based on available part numbers, casting marks, measured dimensions, donor information, and published references. Motorcycles may have been modified over time. Compare the part number, casting, mounting points, bore, dimensions, electrical connections, and photos with the part currently on your motorcycle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQUESTIONS?\u003c\/strong\u003e Send us a message before purchasing if you need additional measurements, photos, condition details, or clarification on what is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSHIPPING:\u003c\/strong\u003e Orders are typically processed and shipped within 1–2 business days after payment. Tracking is provided once the order ships. Parts are packed according to size, weight, and type. Large, heavy, or oversized items may require additional handling or shipping arrangements.\u003c\/p\u003e","brand":"Skyway Cycle Supply","offers":[{"title":"Default Title","offer_id":47502999060564,"sku":null,"price":52.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0700\/0122\/9908\/files\/IMG_0905.heic?v=1786793163","url":"https:\/\/skywaycyclesupply.com\/products\/oem-harley-shovelhead-rear-cylinder-jug-16587-66-3-46-in-bore-approx-020","provider":"Skyway Cycle Supply","version":"1.0","type":"link"}