{"product_id":"harley-davidson-x440-genuine-cylinder-comp-hdh12100acj000s","title":"Harley-Davidson X440 Genuine Cylinder Comp – HDH12100ACJ000S | Fits X440, X440 OBDII \u0026 X440T","description":"\u003ch2\u003eHarley-Davidson X440 Genuine Cylinder Comp – HDH12100ACJ000S | Fits X440, X440 OBDII \u0026amp; X440T\u003c\/h2\u003e\n\n\u003cp\u003eIf you need the \u003cstrong\u003egenuine cylinder block \/ cylinder comp\u003c\/strong\u003e for the \u003cstrong\u003eHarley-Davidson X440 platform\u003c\/strong\u003e, this \u003cstrong\u003eHDH12100ACJ000S\u003c\/strong\u003e is the exact OEM part shown in your parts catalogue as \u003cstrong\u003eCYLINDER COMP.\u003c\/strong\u003e Your screenshot confirms an MRP of \u003cstrong\u003e₹4,592\u003c\/strong\u003e and direct fitment for \u003cstrong\u003eX440 (Sept, 2023)\u003c\/strong\u003e, \u003cstrong\u003eX440 OBDII (May, 2025)\u003c\/strong\u003e, and \u003cstrong\u003eX440T (Jan, 2026)\u003c\/strong\u003e. Public seller pages also list the same part number and the same ₹4,592 price, which supports both the code match and the market identity of this part.\u003c\/p\u003e\n\n\u003cp\u003eIn buyer language, this product is commonly searched as the \u003cstrong\u003eX440 cylinder block\u003c\/strong\u003e, \u003cstrong\u003eX440 cylinder\u003c\/strong\u003e, \u003cstrong\u003eengine cylinder block\u003c\/strong\u003e, \u003cstrong\u003ebarrel\u003c\/strong\u003e, or \u003cstrong\u003ecylinder body\u003c\/strong\u003e. Buyers usually need this part during major engine repair, top-end rebuild work, bore or scoring damage repair, piston seizure damage repair, or when restoring the engine with genuine internals instead of taking chances with reused or damaged castings.\u003c\/p\u003e\n\n\u003cp\u003eThis listing is intentionally built to rank not only for the exact part number \u003cstrong\u003eHDH12100ACJ000S\u003c\/strong\u003e, but also for real buyer searches like \u003cstrong\u003eHarley X440 cylinder block\u003c\/strong\u003e, \u003cstrong\u003eX440 engine cylinder\u003c\/strong\u003e, and \u003cstrong\u003eX440 top end parts\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat This Product Is\u003c\/h3\u003e\n\u003cp\u003eThis is the \u003cstrong\u003egenuine cylinder comp\u003c\/strong\u003e for the Harley-Davidson X440 engine platform. In practical buyer language, this is the \u003cstrong\u003eengine cylinder block \/ barrel\u003c\/strong\u003e used in major top-end engine repair and rebuild work.\u003c\/p\u003e\n\n\u003ch3\u003eVerified Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eHarley-Davidson X440 (Sept, 2023)\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eHarley-Davidson X440 OBDII (May, 2025)\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eHarley-Davidson X440T (Jan, 2026)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Fitment Note\u003c\/h3\u003e\n\u003cp\u003eThis listing is kept conservative and tied to the exact models visible in your official catalogue screenshot. Even if another 440 platform looks similar, this page does \u003cstrong\u003enot\u003c\/strong\u003e claim cross-fitment unless the exact part number is independently confirmed for that model. Buy by exact part number, not by engine similarity.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buyers Need It\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUsed during major engine rebuild or top-end repair\u003c\/li\u003e\n  \u003cli\u003eNeeded when the cylinder bore is worn, scored, or damaged\u003c\/li\u003e\n  \u003cli\u003eUseful after piston seizure or serious internal damage\u003c\/li\u003e\n  \u003cli\u003eImportant when restoring compression and cylinder sealing correctly\u003c\/li\u003e\n  \u003cli\u003ePreferred by buyers who want genuine OEM engine internals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenuine OEM part number:\u003c\/strong\u003e HDH12100ACJ000S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart identity in EPC:\u003c\/strong\u003e CYLINDER COMP.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfirmed fitment from EPC:\u003c\/strong\u003e X440, X440 OBDII, X440T\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMajor engine hard part, not a cosmetic item\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eRelevant for top-end rebuild and cylinder replacement jobs\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMRP shown in catalogue:\u003c\/strong\u003e ₹4,592\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eBest bought only by exact part number match\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Purchase Reasons\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCylinder scoring or bore damage\u003c\/li\u003e\n  \u003cli\u003eEngine rebuild after seizure or internal failure\u003c\/li\u003e\n  \u003cli\u003eCompression loss due to damaged cylinder\u003c\/li\u003e\n  \u003cli\u003eRestoration using genuine top-end parts\u003c\/li\u003e\n  \u003cli\u003eReplacement during professional engine overhaul\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Genuine Matters\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCylinder dimensions and machining accuracy are critical to engine life\u003c\/li\u003e\n  \u003cli\u003eIncorrect or low-quality cylinder castings can affect performance and reliability\u003c\/li\u003e\n  \u003cli\u003eOEM hard parts reduce risk during a costly rebuild\u003c\/li\u003e\n  \u003cli\u003eBetter confidence in compatibility with the original piston, rings, and engine hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment \/ Return Prevention Note\u003c\/h3\u003e\n\u003cp\u003ePlease buy this only after matching the exact part number \u003cstrong\u003eHDH12100ACJ000S\u003c\/strong\u003e. Engine hard parts should never be ordered by appearance alone. Confirm the application by EPC, VIN, or engine teardown requirement before purchase.\u003c\/p\u003e\n\n\u003ch3\u003eWhat’s in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003e1 x Genuine Cylinder Comp\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation \u0026amp; Workshop Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended for professional installation\u003c\/li\u003e\n  \u003cli\u003eAlways inspect piston, rings, wrist pin, cylinder head, and gaskets before rebuild\u003c\/li\u003e\n  \u003cli\u003eMeasure related components as per service procedure before reassembly\u003c\/li\u003e\n  \u003cli\u003eUse fresh gaskets and correct torque sequence during installation\u003c\/li\u003e\n  \u003cli\u003eEngine hard parts should be installed only after confirming full rebuild condition\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomer-facing brand:\u003c\/strong\u003e Harley-Davidson X440 Genuine\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCatalogue \/ backend source:\u003c\/strong\u003e Hero-supported official parts catalogue\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HDH12100ACJ000S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Cylinder Comp.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfirmed Models:\u003c\/strong\u003e X440, X440 OBDII, X440T\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 1 piece\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMRP:\u003c\/strong\u003e ₹4,592\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBuyer-Focused FAQs\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ1. What is HDH12100ACJ000S?\u003c\/strong\u003e\u003cbr\u003e\nIt is the genuine \u003cstrong\u003ecylinder comp \/ engine cylinder block\u003c\/strong\u003e for the Harley-Davidson X440 platform.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ2. Which bikes does it fit?\u003c\/strong\u003e\u003cbr\u003e\nYour official catalogue screenshot confirms \u003cstrong\u003eX440\u003c\/strong\u003e, \u003cstrong\u003eX440 OBDII\u003c\/strong\u003e, and \u003cstrong\u003eX440T\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ3. Is this a service item or a major engine part?\u003c\/strong\u003e\u003cbr\u003e\nThis is a \u003cstrong\u003emajor engine hard part\u003c\/strong\u003e, typically purchased during engine repair, cylinder damage repair, or full top-end rebuild work.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ4. Can I order this just because the engine looks similar to another 440?\u003c\/strong\u003e\u003cbr\u003e\nNo. Hard engine parts should be bought only by exact part number confirmation, not by visual or platform similarity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ5. Why does genuine matter so much here?\u003c\/strong\u003e\u003cbr\u003e\nBecause cylinder block accuracy directly affects fit, compression, reliability, and rebuild outcome. This is not the kind of part where guesswork is worth the risk.\u003c\/p\u003e\n\n\u003ch3\u003eSEO Tags\u003c\/h3\u003e\n\u003cp\u003eHDH12100ACJ000S, Harley X440 genuine cylinder comp, Harley X440 cylinder block, X440 engine cylinder, X440 barrel, X440 top end parts, genuine X440 cylinder comp, Harley-Davidson X440 engine rebuild parts\u003c\/p\u003e","brand":"Harley-Davidson","offers":[{"title":"Default Title","offer_id":51302196543783,"sku":"HDH12100ACJ000S","price":0.0,"currency_code":"INR","in_stock":true}],"url":"https:\/\/underthehood.co.in\/products\/harley-davidson-x440-genuine-cylinder-comp-hdh12100acj000s","provider":"UNDER THE HOOD","version":"1.0","type":"link"}