{"product_id":"s-s-cycle-106-3688","title":"S\u0026S Cycle 99-06 BT 3.927in Standard Bore 97in Big Bore Forged Piston Set","description":"\u003cp\u003eThese big bore pistons work with the stock 4\" stroke flywheels to convert any 1999-'06 HD® big twin engine from 88\" to 97\" displacement with 9.7:1 compression with stock heads. Stock cylinders may be bored to accomodate larger pistons, but we recommend S\u0026amp;S 3.927\" bore cylinders which feature high strength alloyed cast iron liners. Pistons are compatible with stock rods with tapered wristpin ends. S\u0026amp;S® 3.927\" bore pistons are machined to such close tolerances that it is not necessary to measure the piston. Just bore cylinders to nominal diameter +\/- 0.0005\" for correct clearance. Additionally, the low friction coating on the piston skirt makes taking measurements very difficult. 3.927\" standard bore.\u003c\/p\u003e\u003cp\u003eGenuine S\u0026amp;S Cycle. Part number 106-3688.\u003c\/p\u003e\u003cp\u003eShips from US warehouse.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Not CARB approved — not for sale or use on pollution-controlled vehicles in California.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":48723698188513,"sku":"106-3688","price":514.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/7608\/4961\/files\/09437b2ab5757bf75d6822587fb72aa4L.jpg?v=1784701319","url":"https:\/\/mlperformanceusa.com\/products\/s-s-cycle-106-3688","provider":"ML Performance USA","version":"1.0","type":"link"}