{"product_id":"kb-pistons-super-duty-piston-4-250-bore-m8-114-117-to-128-std-11-7-1-824-01834","title":"Kb Pistons Super Duty Piston - 4.250\" Bore M8 114\/117 TO 128\" STD 11.7:1 — Harley-Davidson (2017-2025)","description":"\u003cp\u003eKB Pistons Super Duty pistons for Milwaukee-Eight (M8) big-bore engines, built for street and mild boost applications up to 128 cubic inches. This pair features anodized grooves, abradable skirt coating, and premium Hastings rings for tight tolerances and quiet operation.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAnodized top ring groove and crown\u003c\/li\u003e\n  \u003cli\u003eLine2Line abradable skirt coating (.003\" thickness) for zero initial clearance and self-honing fit\u003c\/li\u003e\n  \u003cli\u003ePremium Hastings 1.2mm steel nitride top ring with ductile napier second ring\u003c\/li\u003e\n  \u003cli\u003eForced wrist pin oiling\u003c\/li\u003e\n  \u003cli\u003eFlat-top design, 1.2cc dish, 1.083\" compression height\u003c\/li\u003e\n  \u003cli\u003eAccommodates 1mm oversize valves\u003c\/li\u003e\n  \u003cli\u003eRound wire wrist pin locks\u003c\/li\u003e\n  \u003cli\u003eSold as a pair with all rings and pins included\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 KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB596LCA.STD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745276186\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 4.250 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Milwaukee-Eight (M8) 114\/117 to 128 cu in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 11.7:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Height:\u003c\/strong\u003e 1.083 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs per pair\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson Milwaukee-Eight (M8) engine builds from 114 cubic inches through 128 cubic inches with 4.250 in bore and 11.7:1 compression ratio.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat's included in this piston kit?\u003c\/h3\u003e\n\u003cp\u003eA pair of pistons, all rings (top and second), wrist pins, and round wire wrist pin locks. Everything needed for both cylinders.\u003c\/p\u003e\n\u003ch3\u003eWhat's the Line2Line abradable skirt coating?\u003c\/h3\u003e\n\u003cp\u003eA proprietary .003 in coating that starts at zero clearance and self-hones as the engine runs, settling into tight, quiet operating clearance.\u003c\/p\u003e\n\u003ch3\u003eWill these pistons fit my 114 ci M8 build?\u003c\/h3\u003e\n\u003cp\u003eYes — these are rated for M8 stroker builds from 114 ci through 128 ci with 4.250 in bore.\u003c\/p\u003e\n\u003ch3\u003eDo I need oversized rings or valves?\u003c\/h3\u003e\n\u003cp\u003eRings are standard size. The piston design accommodates 1mm oversize valves if your cylinder head calls for them.\u003c\/p\u003e\n\u003ch3\u003eAre these suitable for forced induction?\u003c\/h3\u003e\n\u003cp\u003eYes — rated for mild boost applications in forced-induction setups up to 128 ci.\u003c\/p\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035952898159,"sku":"824-01834","price":465.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_1cdec8c5-7d5c-4eea-bda6-4328e3503e36.png?v=1779565761","url":"https:\/\/vtwinbikers.com\/products\/kb-pistons-super-duty-piston-4-250-bore-m8-114-117-to-128-std-11-7-1-824-01834","provider":"Vtwinbikers","version":"1.0","type":"link"}