{"product_id":"s-s-cycle-2007-bt-3-937in-x-4-3-8in-piston-set","title":"S\u0026S Cycle 2007+ BT 3.937in x 4-3\/8in Piston Set","description":"\u003cp\u003eThese 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 107\" displacement with 10.4:1 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. 3.937\" standard bore.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":49173377876220,"sku":"ssc920-0100","price":514.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0064\/8305\/0549\/files\/a4800e09e3c58c2ade186d2aa5538788L.jpg?v=1780943987","url":"https:\/\/www.bullfrogmotosport.com\/products\/s-s-cycle-2007-bt-3-937in-x-4-3-8in-piston-set","provider":"Bullfrog Motosport","version":"1.0","type":"link"}