{"product_id":"s-s-cycle-07-bt-4-1-8in-bore-alternator-stock-bolt-pattern-packaged-wblack-crankcase-assembly","title":"S\u0026S Cycle 07-17 BT 3.927in Standard Bore 106in Big Bore Forged Piston Set","description":"These big bore pistons work with the stock 4-3\/8\" stroke flywheels to convert any 2007-'16 HD® big twin engine from 96\" or 103\" to 106\" displacement with 10:1 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.","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":44400900767918,"sku":"SSC106-3690","price":514.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/0714\/9486\/files\/a0aa9778fd8ab239a361175d7f1ea674.png?v=1702471008","url":"https:\/\/purauto.com\/products\/s-s-cycle-07-bt-4-1-8in-bore-alternator-stock-bolt-pattern-packaged-wblack-crankcase-assembly","provider":"PurAuto","version":"1.0","type":"link"}