{"product_id":"harley-x440-muffler-packing-exhaust-gasket-hdh18392-acj-000","title":"Harley-Davidson X440 \/ X440 OBDII \/ X440T Muffler Packing OEM | HDH18392-ACJ-000","description":"\u003cp\u003e\u003cstrong\u003eReplace a worn or damaged exhaust joint seal with this genuine OEM muffler packing for Harley-Davidson X440 series motorcycles.\u003c\/strong\u003e Part number \u003cstrong\u003eHDH18392-ACJ-000\u003c\/strong\u003e is listed in the OEM record as \u003cstrong\u003ePACKING MUFFLER\u003c\/strong\u003e. In normal buyer language, this part is best understood as the \u003cstrong\u003emuffler packing ring\u003c\/strong\u003e, \u003cstrong\u003esilencer gasket\u003c\/strong\u003e, \u003cstrong\u003eexhaust gasket\u003c\/strong\u003e, or \u003cstrong\u003emuffler sealing ring\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThis small but important exhaust sealing part helps the muffler joint seal correctly. When the old packing is crushed, hardened, leaking, or damaged during exhaust removal, riders may notice exhaust leakage, a blowing sound from the joint area, soot marks, or an untidy exhaust fit. Replacing the correct OEM packing helps restore a tighter seal and cleaner exhaust-side fitment.\u003c\/p\u003e\n\n\u003cp\u003eThis page is intentionally written in buyer language, not only factory terminology. Customers usually search for terms like \u003cstrong\u003emuffler gasket\u003c\/strong\u003e, \u003cstrong\u003esilencer packing\u003c\/strong\u003e, \u003cstrong\u003eexhaust packing ring\u003c\/strong\u003e, or \u003cstrong\u003esilencer sealing ring\u003c\/strong\u003e, so those search terms are naturally included here to improve discoverability and reduce confusion.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eConfirmed fitment:\u003c\/strong\u003e Harley-Davidson \u003cstrong\u003eX440\u003c\/strong\u003e, \u003cstrong\u003eX440 OBDII\u003c\/strong\u003e, and \u003cstrong\u003eX440T\u003c\/strong\u003e. This SKU is \u003cstrong\u003enot confirmed\u003c\/strong\u003e here for X440X or Hero Mavrick 440, so please do not assume it is shared across all 440-family motorcycles.\u003c\/p\u003e\n\n\u003cp\u003eThis listing is for \u003cstrong\u003eone muffler packing ring only\u003c\/strong\u003e. It is not the full silencer, not the muffler cover, and not the complete exhaust assembly. Please match the old part number and exact exhaust-joint requirement before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGenuine OEM muffler packing \/ exhaust sealing ring\u003c\/li\u003e\n  \u003cli\u003ePart number: HDH18392-ACJ-000\u003c\/li\u003e\n  \u003cli\u003eFactory description: PACKING MUFFLER\u003c\/li\u003e\n  \u003cli\u003eBuyer language: muffler packing, silencer gasket, exhaust gasket, muffler sealing ring\u003c\/li\u003e\n  \u003cli\u003eConfirmed for Harley-Davidson X440, X440 OBDII, and X440T\u003c\/li\u003e\n  \u003cli\u003eHelps seal the exhaust joint more cleanly\u003c\/li\u003e\n  \u003cli\u003eUseful when the original packing is crushed, leaking, hardened, or damaged\u003c\/li\u003e\n  \u003cli\u003eSupports cleaner exhaust fit and reduced leakage at the joint area\u003c\/li\u003e\n  \u003cli\u003eImportant distinction from full muffler, exhaust cover, and complete exhaust assembly\u003c\/li\u003e\n  \u003cli\u003eOEM-style replacement for the listed applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eMake\u003c\/th\u003e\n      \u003cth\u003eModel \/ Variant\u003c\/th\u003e\n      \u003cth\u003ePlatform\u003c\/th\u003e\n      \u003cth\u003eYears (Approx.)\u003c\/th\u003e\n      \u003cth\u003eFitment Status\u003c\/th\u003e\n      \u003cth\u003eNotes\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHarley-Davidson\u003c\/td\u003e\n      \u003ctd\u003eX440\u003c\/td\u003e\n      \u003ctd\u003eHarley X440\u003c\/td\u003e\n      \u003ctd\u003eSept 2023\u003c\/td\u003e\n      \u003ctd\u003eConfirmed\u003c\/td\u003e\n      \u003ctd\u003eConfirmed for the supplied X440 application.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHarley-Davidson\u003c\/td\u003e\n      \u003ctd\u003eX440 OBDII\u003c\/td\u003e\n      \u003ctd\u003eHarley X440\u003c\/td\u003e\n      \u003ctd\u003eMay 2025\u003c\/td\u003e\n      \u003ctd\u003eConfirmed\u003c\/td\u003e\n      \u003ctd\u003eConfirmed for the supplied X440 OBDII application.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHarley-Davidson\u003c\/td\u003e\n      \u003ctd\u003eX440T\u003c\/td\u003e\n      \u003ctd\u003eHarley X440 T\u003c\/td\u003e\n      \u003ctd\u003eJan 2026\u003c\/td\u003e\n      \u003ctd\u003eConfirmed\u003c\/td\u003e\n      \u003ctd\u003eConfirmed for the supplied X440T application.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHarley-Davidson\u003c\/td\u003e\n      \u003ctd\u003eX440X\u003c\/td\u003e\n      \u003ctd\u003eHarley X440 family\u003c\/td\u003e\n      \u003ctd\u003e\u003c\/td\u003e\n      \u003ctd\u003eVerify by VIN \/ EPC \/ old part match\u003c\/td\u003e\n      \u003ctd\u003eNot confirmed for this SKU here.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHero\u003c\/td\u003e\n      \u003ctd\u003eMavrick 440\u003c\/td\u003e\n      \u003ctd\u003eHero 440 platform\u003c\/td\u003e\n      \u003ctd\u003e\u003c\/td\u003e\n      \u003ctd\u003eVerify by VIN \/ EPC \/ old part match\u003c\/td\u003e\n      \u003ctd\u003eNot confirmed for this SKU here.\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eVariants\u003c\/h3\u003e\n\u003cp\u003eNone.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x HDH18392-ACJ-000 – Muffler Packing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation \u0026amp; Maintenance Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePlease match the old part number before ordering.\u003c\/li\u003e\n  \u003cli\u003eThis is a sealing component for the exhaust \/ muffler joint, not a cosmetic cover.\u003c\/li\u003e\n  \u003cli\u003eIf the exhaust has been removed, inspect the old packing before reassembly.\u003c\/li\u003e\n  \u003cli\u003eCheck the mating surfaces and exhaust joint condition during installation.\u003c\/li\u003e\n  \u003cli\u003eIf leakage continues after replacement, inspect nearby exhaust alignment and joint hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBefore You Order\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This listing is for \u003cstrong\u003eone muffler packing ring\u003c\/strong\u003e. It is not the full muffler, not the heat shield, and not a complete exhaust kit.\u003c\/p\u003e\n\n\u003cp\u003ePlease do not assume all X440-family motorcycles use the same exhaust sealing parts. Match your bike model and old part number before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buy From Under The Hood\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBuyer-friendly naming built around real search terms\u003c\/li\u003e\n  \u003cli\u003eClear distinction between sealing part and full exhaust components\u003c\/li\u003e\n  \u003cli\u003eFitment kept conservative to reduce costly wrong orders\u003c\/li\u003e\n  \u003cli\u003eUseful for customers fixing exhaust leaks and restoring correct fitment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1. What is HDH18392-ACJ-000?\u003c\/strong\u003e\u003cbr\u003e\nIt is the OEM muffler packing \/ exhaust sealing ring for the listed Harley-Davidson X440 applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e2. Which bikes is this confirmed for?\u003c\/strong\u003e\u003cbr\u003e\nIt is confirmed for \u003cstrong\u003eHarley-Davidson X440\u003c\/strong\u003e, \u003cstrong\u003eX440 OBDII\u003c\/strong\u003e, and \u003cstrong\u003eX440T\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e3. Is this the same as a muffler gasket?\u003c\/strong\u003e\u003cbr\u003e\nYes. Buyers commonly search this type of part as a \u003cstrong\u003emuffler gasket\u003c\/strong\u003e, \u003cstrong\u003esilencer gasket\u003c\/strong\u003e, or \u003cstrong\u003eexhaust packing ring\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e4. Is this the full silencer?\u003c\/strong\u003e\u003cbr\u003e\nNo. This listing is for the \u003cstrong\u003emuffler packing \/ sealing ring\u003c\/strong\u003e only.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e5. Will it fit X440X or Hero Mavrick 440?\u003c\/strong\u003e\u003cbr\u003e\nThose applications are not confirmed here for this SKU. Please verify by VIN \/ EPC \/ old part match before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e6. When should muffler packing be replaced?\u003c\/strong\u003e\u003cbr\u003e\nReplace it when the old packing is crushed, leaking, hardened, or damaged during exhaust work.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e7. What should be checked before ordering?\u003c\/strong\u003e\u003cbr\u003e\nConfirm the bike model, old part number, and exact exhaust-joint requirement before purchase.\u003c\/p\u003e","brand":"Harley-Davidson","offers":[{"title":"Default Title","offer_id":51324520431911,"sku":"HDH18392-ACJ-000","price":95.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/HDH18392-ACJ-000.jpg?v=1776959952","url":"https:\/\/underthehood.co.in\/products\/harley-x440-muffler-packing-exhaust-gasket-hdh18392-acj-000","provider":"UNDER THE HOOD","version":"1.0","type":"link"}