{"product_id":"kb-performance-kb258-030-piston-kit-3-498-0-030-8-6-1-cr-80-evolution-big-twin-street","title":"Kb Performance KB258.030 Piston Kit - 3.498\" +0.030\" - 8.6:1 CR - 80\" Evolution Big Twin | Street","description":"\u003cp\u003eThis KB Performance replacement piston kit is designed for the specific Harley-Davidson applications listed below. Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy.\u003c\/li\u003e\n\u003cli\u003eAllow a tighter fit and longer piston and ring life.\u003c\/li\u003e\n\u003cli\u003eDiamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005\") tolerances from piston to piston.\u003c\/li\u003e\n\u003cli\u003eEach kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings.\u003c\/li\u003e\n\u003cli\u003eReplacement piston rings and pin lock rings available separately.\u003c\/li\u003e\n\u003cli\u003eKB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance.\u003c\/li\u003e\n\u003cli\u003eDue to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kb Performance","offers":[{"title":"Default Title","offer_id":52529363353895,"sku":"0910-2017","price":233.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0860\/2746\/9095\/files\/8BA6AA68-122E-4FC2-8B66-2CBF6084EF56.png?v=1793834332","url":"https:\/\/www.cyclecityoutdoors.com\/products\/kb-performance-kb258-030-piston-kit-3-498-0-030-8-6-1-cr-80-evolution-big-twin-street","provider":"Cycle City Outdoors","version":"1.0","type":"link"}