{"product_id":"s-s-cycle-106-5520-3-1-2-010-80-hc-forged-pistons-for-1978-84-hd®-ohv-engines","title":"S\u0026S Cycle 106-5520 3-1\/2\",+.010\", 80\" HC Forged Pistons for 1978-'84 HD® OHV Engines","description":"\u003ch1\u003eS\u0026amp;S Cycle 106-5520\u003c\/h1\u003e These 3-1\/2\" +.010\" bore high compression pistons fit 1979-'84 74\" HD\u003csup\u003e®\u003c\/sup\u003e big twin engines, producing 9:1 compression with stock unmodified cylinder heads.. The modern alloys used in these pistons, coupled with the advanced skirt profiles, allow them to be fit tighter resulting in low engine noise and long engine life. In the past, this could only be achieved with weaker cast pistons. S\u0026amp;S\u003csup\u003e®\u003c\/sup\u003e will fit these pistons to your existing cylinders (when purchasing new cylinders, pistons can be fit to them as an option) \u003ca href=\"https:\/\/www.sscycle.com\/content\/document_center\/Instruction_Sheets\/106-6072_-forged_piston_20140116.pdf\" target=\"_blank\" alt=\"Download Instructions\"\u003eInstall Instructions Download\u003c\/a\u003e\u003ca href=\"https:\/\/www.sscycle.com\/content\/document_center\/Instruction_Sheets\/510-0005_piston_rings.pdf\" target=\"_blank\" alt=\"Download Additional Instructions\"\u003eAdditional Install Instructions\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":53260671549747,"sku":"SS+106-5520","price":410.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/6764\/5747\/files\/ss-106-5520-ss-cycle-106-5520-3-1-2-010-80-hc-forged-pistons-for-1978-84-hd-ohv-engines-2.png?v=1776708778","url":"https:\/\/houseofharley.com\/products\/s-s-cycle-106-5520-3-1-2-010-80-hc-forged-pistons-for-1978-84-hd%c2%ae-ohv-engines","provider":"House of Harley®","version":"1.0","type":"link"}