{"product_id":"s-s-cycle-106-3688-97-big-bore-forged-pistons-for-1999-06-hd®-big-twins-3-927-standard-bore","title":"S\u0026S Cycle 106-3688 97\" Big Bore Forged Pistons For 1999-'06 HD® Big Twins - 3.927\" Standard Bore","description":"\u003ch1\u003eS\u0026amp;S Cycle 106-3688\u003c\/h1\u003e These big bore pistons work with the stock 4\" stroke flywheels to convert any 1999-'06 HD\u003csup\u003e®\u003c\/sup\u003e big twin engine from 88\" to 97\" displacement with 9.7:1 compression with stock heads. Stock cylinders may be bored to accommodate 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\u003csup\u003e®\u003c\/sup\u003e 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. \u003ca href=\"https:\/\/www.sscycle.com\/content\/document_center\/Instruction_Sheets\/106-5986_106_97bbk_20130222.pdf\" target=\"_blank\" alt=\"Download Instructions\"\u003eInstall Instructions Download\u003c\/a\u003e\u003ch3\u003eFITMENT DISCLAIMER\u003c\/h3\u003e\n\u003cp\u003eFitment information is provided as a general reference only and is not guaranteed for any motorcycle, whether stock or modified. Compatibility may vary by year, model, and individual configuration.\u003c\/p\u003e\n\n\u003cp\u003eCustomers are responsible for verifying fitment prior to purchase. House of Harley-Davidson assumes no liability for purchases made based on incorrect or unverified fitment information.\u003c\/p\u003e\n\n\u003cp\u003ePlease contact our Parts Department with any questions before ordering at \u003ca href=\"tel:4142822211\"\u003e414-282-2211\u003c\/a\u003e\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53260530352435,"sku":"SS+106-3688","price":514.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/6764\/5747\/files\/ss-106-3688-ss-cycle-106-3688-97-big-bore-forged-pistons-for-1999-06-hd-big-twins-3927-standard-bore-2.png?v=1776707380","url":"https:\/\/houseofharley.com\/products\/s-s-cycle-106-3688-97-big-bore-forged-pistons-for-1999-06-hd%c2%ae-big-twins-3-927-standard-bore","provider":"House of Harley®","version":"1.0","type":"link"}