{"product_id":"kb-pistons-super-duty-piston-4-250-bore-m8-114-117-to-128-005-11-7-1-824-01835","title":"Kb Pistons Super Duty Piston - 4.250\" Bore M8 114\/117 TO 128\"+.005 11.7:1 — Harley-Davidson (2017-2021)","description":"\u003cp\u003eKB Pistons Super Duty piston pair for Milwaukee-Eight (M8) engines at 4.250\" bore, engineered for displacement builds from 114cc to 128cc+ with 11.7:1 compression ratio. Features anodized crown, Line2Line abradable skirt coating, and premium Hastings ring package for durability in high-performance applications.\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 tight running fit\u003c\/li\u003e\n  \u003cli\u003eRound wire wrist pin locks\u003c\/li\u003e\n  \u003cli\u003ePremium Hastings 1.2mm top ring with Steel Nitride coating and Ductile Napier second ring\u003c\/li\u003e\n  \u003cli\u003eForced wrist pin oiling system\u003c\/li\u003e\n  \u003cli\u003eFlat-top design with 1.2cc dish and 1.083\" compression height\u003c\/li\u003e\n  \u003cli\u003eValve pockets cut for 1mm oversize valves\u003c\/li\u003e\n  \u003cli\u003eAll rings, wrist pins, and locks included\u003c\/li\u003e\n  \u003cli\u003eSold as a pair\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.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745276179\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e 4.250\"\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\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDish Volume:\u003c\/strong\u003e 1.2cc\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Pair (2 pistons)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Platform:\u003c\/strong\u003e M8 (Milwaukee-Eight)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.5 lbs\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\u003eDesigned for Harley-Davidson Milwaukee-Eight (M8) engines at 4.250\" bore. Suitable for displacement builds from 114cc to 128cc+.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eDo these pistons come with rings and wrist pins?\u003c\/h3\u003e\n\u003cp\u003eYes — all Hastings rings, wrist pins, and round wire locks are included in the pair.\u003c\/p\u003e\n\u003ch3\u003eWhat is the Line2Line abradable skirt coating?\u003c\/h3\u003e\n\u003cp\u003eA .003\" thick coating that starts with zero clearance and self-hones during break-in to create a tight, quiet running fit.\u003c\/p\u003e\n\u003ch3\u003eCan these handle oversized valves?\u003c\/h3\u003e\n\u003cp\u003eYes — the valve pockets are cut to accommodate 1mm oversize valves on M8 heads.\u003c\/p\u003e\n\u003ch3\u003eAre these street-legal for my Harley?\u003c\/h3\u003e\n\u003cp\u003eThese are performance-grade pistons designed for high-displacement builds. Verify your local emissions and noise regulations before installation, especially if combined with other modifications.\u003c\/p\u003e\n\u003ch3\u003eWhat compression ratio do these run?\u003c\/h3\u003e\n\u003cp\u003e11.7:1 compression ratio, suitable for premium 91-93 octane fuel in most M8 applications.\u003c\/p\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035952963695,"sku":"824-01835","price":465.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_f0760d20-a8a1-43df-974f-ef51ebb3aa99.png?v=1779565675","url":"https:\/\/vtwinbikers.com\/products\/kb-pistons-super-duty-piston-4-250-bore-m8-114-117-to-128-005-11-7-1-824-01835","provider":"Vtwinbikers","version":"1.0","type":"link"}