{"product_id":"s-s-cycle-106-4570-s-s®-performance-replacement-low-compression-82cc-cylinder-heads-for-1984-99-hd®-big-twins-wrinkle-black-powdercoat-finish","title":"S\u0026S Cycle 106-4570 S\u0026S® Performance Replacement Low Compression 82cc Cylinder Heads For 1984-'99 HD® Big Twins - Wrinkle Black Powdercoat Finish","description":"\u003ch1\u003eS\u0026amp;S Cycle 106-4570\u003c\/h1\u003e \u003cp\u003eS\u0026amp;S\u003csup\u003e®\u003c\/sup\u003e Performance Replacement cylinder heads for 1986-'99 HD\u003csup\u003e®\u003c\/sup\u003e Evolution\u003csup\u003e®\u003c\/sup\u003e big twin engines are designed to be compatible with a stock style flat topped piston. This set has a slightly larger 82cc combustion chamber making them idea for larger displacement applications, producing a managable compression ratio. These heads are original equipment on S\u0026amp;S\u003csup\u003e®\u003c\/sup\u003e V96 and V80 engines. Larger than stock 1.900\" intake and 1.575\" exhaust valves provide plenty of air while maintaining port velocity for good low and midrange response. S\u0026amp;S\u003csup\u003e®\u003c\/sup\u003e high lift valve springs allow the installation of cams with up to .585\" lift. Compatible with stock intake manifolds, exhaust systems, and temperature sensors for EFI equipped models. Wrinkle black powder coat finish.\u003c\/p\u003e \u003ca href=\"https:\/\/www.sscycle.com\/content\/document_center\/Instruction_Sheets\/51-1197_cylinder-head-kit-for-1984-99.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":53260651823411,"sku":"SS+106-4570","price":1559.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/6764\/5747\/files\/ss-106-4570-ss-cycle-106-4570-ss-performance-replacement-low-compression-82cc-cylinder-heads-for-1984-99-hd-big-twins-wrinkle-black-powdercoat-finish-2.png?v=1776707874","url":"https:\/\/houseofharley.com\/products\/s-s-cycle-106-4570-s-s%c2%ae-performance-replacement-low-compression-82cc-cylinder-heads-for-1984-99-hd%c2%ae-big-twins-wrinkle-black-powdercoat-finish","provider":"House of Harley®","version":"1.0","type":"link"}