{"product_id":"wiseco-v-twin-piston-kit-1340-evo-big-twin-10-1-comp-k1668","title":"Wiseco V-Twin Piston Kit - 1340 EVO BIG Twin 10:1 Comp — Harley-Davidson Electra Glide Classic, Softail Custom, Softail Heritage Classic (1984-1999)","description":"\u003cp\u003eWiseco V-Twin piston kit for 1340cc EVO Big Twin engines, forged from high-silicon aluminum for strength and heat transfer. Direct fit for stock and rebored cylinders in cast iron, chrome, nikasil, and boron composite sleeves.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eForged high-silicon, low-expansion aluminum\u003c\/li\u003e\n  \u003cli\u003eDiamond-turned finish with zero size variation\u003c\/li\u003e\n  \u003cli\u003eFits cast iron, chrome, nikasil, and boron composite cylinders\u003c\/li\u003e\n  \u003cli\u003eReduced weight and improved heat transfer\u003c\/li\u003e\n  \u003cli\u003eCompatible with oversized and replacement cylinder sleeves\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Wiseco\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e K1668\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 1340cc EVO Big Twin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson 1340cc EVO Big Twin engines with 10:1 compression ratio. Compatible with stock bore and oversized applications in cast iron, chrome, nikasil, and boron composite cylinder configurations.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWill this piston fit my Big Twin with a rebored cylinder?\u003c\/h3\u003e\n\u003cp\u003eYes — Wiseco pistons are engineered to work in stock bore and oversized applications. Check your cylinder sleeve material before ordering to ensure compatibility.\u003c\/p\u003e\n\u003ch3\u003eWhat compression ratio is this kit?\u003c\/h3\u003e\n\u003cp\u003eThis is a 10:1 compression ratio piston set, designed for performance and durability in stock and mildly modified EVO engines.\u003c\/p\u003e\n\u003ch3\u003eCan I use this in chrome or nikasil cylinders?\u003c\/h3\u003e\n\u003cp\u003eYes — Wiseco pistons are designed to work confidently in cast iron, chrome, nikasil, and boron composite cylinders without special preparation.\u003c\/p\u003e\n\u003ch3\u003eDo these pistons require any special break-in procedure?\u003c\/h3\u003e\n\u003cp\u003eFollow standard break-in procedures for your engine — gradual throttle application and varied RPM for the first few hundred miles to properly seat the rings.\u003c\/p\u003e\n\u003ch3\u003eWhat's included in the kit?\u003c\/h3\u003e\n\u003cp\u003eThe kit includes all pistons, pins, and circlips needed for a complete piston replacement in your 1340cc Big Twin engine.\u003c\/p\u003e","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":53035619450991,"sku":"K1668","price":447.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_ac374d69-407e-4f38-9057-eef8fa2901a4.png?v=1779562947","url":"https:\/\/vtwinbikers.com\/products\/wiseco-v-twin-piston-kit-1340-evo-big-twin-10-1-comp-k1668","provider":"Vtwinbikers","version":"1.0","type":"link"}