{"product_id":"hkk-indore-hkm4a-black-silencer-royal-enfield-classic-350-reborn-j-series","title":"HKK Indore HKM4A Black Silencer for Royal Enfield Classic 350 Reborn J-Series","description":"\u003cp\u003e\u003cstrong\u003eHKK Indore HKM4A Black Silencer\u003c\/strong\u003e is an aftermarket rear exhaust silencer made for the \u003cstrong\u003eRoyal Enfield Classic 350 Reborn J-Series\u003c\/strong\u003e. It features a long rounded bottle-style body with a black exterior finish, making it suitable for riders looking for a darker replacement or custom exhaust appearance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This is an HKK Indore aftermarket product. It is not a Royal Enfield genuine or OEM silencer.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Identification\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eHKK Indore\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eManufacturer Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eHKM4A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eFactory Label Description\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eRB SP CP (57) SIL.\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eRear silencer \/ motorcycle muffler\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eRoyal Enfield Classic 350 Reborn J-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eVisible Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eBlack matte\/satin appearance\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e1 piece\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eAftermarket Status\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eAftermarket product\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Choose This Silencer?\u003c\/h2\u003e\n\u003cp\u003eThis HKK Indore silencer is intended for Classic 350 Reborn owners who want a black exhaust appearance while retaining a long, traditional bottle-style profile. The exact manufacturer code on the box helps prevent confusion with similar-looking HKK silencers made for UCE, Bullet, Meteor, Hunter or other Royal Enfield platforms.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHKK Indore branded aftermarket silencer\u003c\/li\u003e\n  \u003cli\u003eExact manufacturer code: \u003cstrong\u003eHKM4A\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eFactory label description: \u003cstrong\u003eRB SP CP (57) SIL.\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eDesigned for Royal Enfield Classic 350 Reborn J-Series application\u003c\/li\u003e\n  \u003cli\u003eBlack exterior finish\u003c\/li\u003e\n  \u003cli\u003eLong rounded bottle-style body\u003c\/li\u003e\n  \u003cli\u003eSingle rear silencer supplied\u003c\/li\u003e\n  \u003cli\u003eSuitable for replacement, restoration or blacked-out custom builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat This Product Is\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eA single HKK Indore aftermarket rear silencer\u003c\/li\u003e\n  \u003cli\u003eA motorcycle muffler for the Classic 350 Reborn J-Series application\u003c\/li\u003e\n  \u003cli\u003eA black-finished replacement or custom exhaust component\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat This Product Is Not\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eNot a Royal Enfield genuine or OEM silencer\u003c\/li\u003e\n  \u003cli\u003eNot a complete exhaust system\u003c\/li\u003e\n  \u003cli\u003eNot an exhaust bend pipe or engine header pipe\u003c\/li\u003e\n  \u003cli\u003eNot a catalytic-converter assembly\u003c\/li\u003e\n  \u003cli\u003eNot an exhaust heat shield\u003c\/li\u003e\n  \u003cli\u003eNot a pair of silencers\u003c\/li\u003e\n  \u003cli\u003eNot a universal Royal Enfield exhaust\u003c\/li\u003e\n  \u003cli\u003eNot automatically compatible with every J-Series motorcycle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eConfirmed Compatibility\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr\u003e\n    \u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eMotorcycle\u003c\/th\u003e\n    \u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eGeneration\u003c\/th\u003e\n    \u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eFitment Status\u003c\/th\u003e\n    \u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eImportant Note\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eRoyal Enfield Classic 350 Reborn\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eJ-Series\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eConfirmed application\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eVerify inlet connection, bracket position and supplied hardware before installation.\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFitment Not Confirmed \/ Check Before Ordering\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr\u003e\n    \u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eMotorcycle\u003c\/th\u003e\n    \u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eWhy Verification Is Required\u003c\/th\u003e\n    \u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eWhat Must Be Checked\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eBullet 350 J-Series\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eShared engine family does not prove identical exhaust mounting.\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eInlet size, bracket location and silencer angle.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eMeteor 350\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eDifferent chassis and exhaust layout.\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eConnection, mounting bracket and clearance.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eHunter 350\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eDifferent exhaust design and mounting arrangement.\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eInlet, bracket and footrest clearance.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eGoan Classic 350\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eExact HKM4A fitment not confirmed.\u003c\/td\u003e\n    \u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eManufacturer confirmation and physical bracket match.\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eNot Compatible \/ Do Not Order For\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eClassic 350 UCE\u003c\/li\u003e\n  \u003cli\u003eClassic 500 UCE\u003c\/li\u003e\n  \u003cli\u003eBullet 350 UCE\u003c\/li\u003e\n  \u003cli\u003eBullet 500 UCE\u003c\/li\u003e\n  \u003cli\u003eElectra 350 UCE\u003c\/li\u003e\n  \u003cli\u003eThunderbird 350 \/ 500\u003c\/li\u003e\n  \u003cli\u003eThunderbird X\u003c\/li\u003e\n  \u003cli\u003eHimalayan 411\u003c\/li\u003e\n  \u003cli\u003eScram 411\u003c\/li\u003e\n  \u003cli\u003eHimalayan 450\u003c\/li\u003e\n  \u003cli\u003eGuerrilla 450\u003c\/li\u003e\n  \u003cli\u003eInterceptor 650\u003c\/li\u003e\n  \u003cli\u003eContinental GT 650\u003c\/li\u003e\n  \u003cli\u003eSuper Meteor 650\u003c\/li\u003e\n  \u003cli\u003eShotgun 650\u003c\/li\u003e\n  \u003cli\u003eBear 650\u003c\/li\u003e\n  \u003cli\u003eClassic 650\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSound Profile\u003c\/h2\u003e\n\u003cp\u003eThe exact sound output of HKM4A has not yet been independently tested by Under The Hood. Therefore, this listing does not make unsupported claims such as medium sound, loud sound, deep bass, free-flow, three-filter construction or a specific decibel level.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIdle character:\u003c\/strong\u003e Not independently tested\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAcceleration note:\u003c\/strong\u003e Not independently tested\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBass level:\u003c\/strong\u003e Not independently tested\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBaffle or filter count:\u003c\/strong\u003e Not confirmed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemovable baffle:\u003c\/strong\u003e Not confirmed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStock comparison:\u003c\/strong\u003e Not yet measured\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eActual sound can vary with the motorcycle, engine condition, catalytic converter, bend pipe, internal baffle design, exhaust leakage, recording equipment and playback device.\u003c\/p\u003e\n\n\u003ch2\u003eConstruction and Finish\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eVisible Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eFinish Appearance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eMatte\/satin\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eBase Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot independently verified\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eCoating Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot independently verified\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eBrand Marking\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eHKK \/ Old Is Gold marking visible\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003e\u003cstrong\u003eBody Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eLong rounded bottle-style body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eDimensions and Mounting Details\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr\u003e\n\u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eMeasurement \/ Status\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eOverall Length\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot measured\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eMain Body Length\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot measured\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eInlet Inner Diameter\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot measured\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eInlet Outer Diameter\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot measured\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eOutlet Diameter\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot measured\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eMain Body Diameter\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot measured\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eMounting-Hole Diameter\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot measured\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eBracket Distance\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot measured\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eProduct Weight\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot measured\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eClamp Size\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eNot confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eBS Stage and Exhaust Configuration Note\u003c\/h2\u003e\n\u003cp\u003eThis product is listed for the Classic 350 Reborn J-Series application. The following details should be physically confirmed before installation:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWhether it connects directly to the stock bend pipe\u003c\/li\u003e\n  \u003cli\u003eWhether the stock catalytic converter remains in place\u003c\/li\u003e\n  \u003cli\u003eWhether an adapter sleeve is required\u003c\/li\u003e\n  \u003cli\u003eWhether the original exhaust clamp can be reused\u003c\/li\u003e\n  \u003cli\u003eWhether a separate exhaust gasket is required\u003c\/li\u003e\n  \u003cli\u003eWhether a spacer or alternate mounting bolt is required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFitment compatibility does not itself confirm noise or emission compliance.\u003c\/p\u003e\n\n\u003ch2\u003eSimilar Product Comparison\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr\u003e\n\u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eProduct Type\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:8px;text-align:left;\"\u003eMain Difference\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eHKK Indore HKM4A\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eThis black Reborn J-Series silencer\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eGenuine Classic 350 Reborn Silencer\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eRoyal Enfield OEM component with factory sound and construction\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eFree-Flow Reborn Silencer\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eMay have a different internal baffle design and louder sound\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eUCE Classic Silencer\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eDifferent motorcycle generation and fitment\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eComplete Reborn Exhaust System\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:8px;\"\u003eIncludes more than the rear silencer and may include a bend pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × HKK Indore HKM4A black aftermarket silencer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat’s Not Confirmed as Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eBend pipe\u003c\/li\u003e\n  \u003cli\u003eExhaust clamp\u003c\/li\u003e\n  \u003cli\u003eExhaust gasket\u003c\/li\u003e\n  \u003cli\u003eMounting bolt\u003c\/li\u003e\n  \u003cli\u003eSpacer or washer\u003c\/li\u003e\n  \u003cli\u003eHeat shield\u003c\/li\u003e\n  \u003cli\u003eCatalytic converter\u003c\/li\u003e\n  \u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAdditional Parts That May Be Required\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrect-size exhaust clamp\u003c\/li\u003e\n  \u003cli\u003eExhaust joint gasket or sealing sleeve\u003c\/li\u003e\n  \u003cli\u003eMounting bolt, washer or spacer\u003c\/li\u003e\n  \u003cli\u003eExisting stock bend pipe in reusable condition\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRequirement depends on the motorcycle’s current exhaust configuration and the final package contents.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInstallation by a competent motorcycle technician is recommended.\u003c\/li\u003e\n  \u003cli\u003eCompare the inlet diameter with the existing exhaust connection before fitting.\u003c\/li\u003e\n  \u003cli\u003eConfirm that the welded mounting bracket aligns without forcing or bending the silencer.\u003c\/li\u003e\n  \u003cli\u003eDo not drill, cut, weld or modify the product before confirming fitment.\u003c\/li\u003e\n  \u003cli\u003eCheck clearance from the swingarm, centre stand, rear footrest and nearby body components.\u003c\/li\u003e\n  \u003cli\u003eInspect the exhaust joint for leakage after installation.\u003c\/li\u003e\n  \u003cli\u003eRecheck the clamp and mounting fastener after the first complete heat cycle.\u003c\/li\u003e\n  \u003cli\u003eTest the motorcycle at low speed before normal use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCare and Maintenance\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAllow the silencer to cool fully before cleaning.\u003c\/li\u003e\n  \u003cli\u003eUse a soft cloth and mild automotive shampoo.\u003c\/li\u003e\n  \u003cli\u003eAvoid acidic wheel cleaners, harsh solvents and abrasive metal polish.\u003c\/li\u003e\n  \u003cli\u003eRemove mud and road contamination promptly.\u003c\/li\u003e\n  \u003cli\u003eDry the silencer after washing.\u003c\/li\u003e\n  \u003cli\u003eInspect the mounting fastener and clamp periodically.\u003c\/li\u003e\n  \u003cli\u003eCheck regularly for exhaust leakage around the connection.\u003c\/li\u003e\n  \u003cli\u003eSome finish change may occur near high-temperature areas after use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eReturn-Prevention Note\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThis is an aftermarket exhaust product.\u003c\/strong\u003e Before installation, confirm that the motorcycle is a Classic 350 Reborn J-Series and verify the current silencer inlet size, exhaust connection, mounting-bracket position, required clamp and available clearance.\u003c\/p\u003e\n\u003cp\u003eDo not start or run the motorcycle until fitment and package contents have been fully checked. Once installed and used, exhaust parts may immediately develop clamp marks, mounting marks, carbon deposits, soot and heat-related finish changes. Sound preference is subjective and should not replace physical fitment verification.\u003c\/p\u003e\n\n\u003ch2\u003eCompliance and Use Note\u003c\/h2\u003e\n\u003cp\u003eAftermarket exhaust fitment, noise and emission requirements may vary according to the motorcycle configuration and applicable local rules. No claim is made that this product is RTO approved, road legal, BS6 certified, noise certified, emission certified or PUC compliant unless supported by product-specific certification.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eIs this a genuine Royal Enfield silencer?\u003c\/h3\u003e\n\u003cp\u003eNo. This is an HKK Indore aftermarket silencer.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the manufacturer code?\u003c\/h3\u003e\n\u003cp\u003eThe package identifies the product as \u003cstrong\u003eHKM4A\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat does the package label say?\u003c\/h3\u003e\n\u003cp\u003eThe factory label reads \u003cstrong\u003eRB SP CP (57) SIL.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhich motorcycle is it for?\u003c\/h3\u003e\n\u003cp\u003eIt is listed for the Royal Enfield Classic 350 Reborn J-Series application.\u003c\/p\u003e\n\n\u003ch3\u003eWill it fit Classic 350 UCE?\u003c\/h3\u003e\n\u003cp\u003eNo. Classic 350 UCE is a different motorcycle and exhaust generation.\u003c\/p\u003e\n\n\u003ch3\u003eWill it fit Bullet 350 J-Series?\u003c\/h3\u003e\n\u003cp\u003eFitment is not confirmed. Do not order by engine-family name alone.\u003c\/p\u003e\n\n\u003ch3\u003eWill it fit Meteor 350 or Hunter 350?\u003c\/h3\u003e\n\u003cp\u003eNot confirmed. Their exhaust layout, mounting position and clearances may differ.\u003c\/p\u003e\n\n\u003ch3\u003eIs this sold as one silencer or a pair?\u003c\/h3\u003e\n\u003cp\u003eThis listing is for one silencer.\u003c\/p\u003e\n\n\u003ch3\u003eIs this a complete exhaust system?\u003c\/h3\u003e\n\u003cp\u003eNo. This is the rear silencer only.\u003c\/p\u003e\n\n\u003ch3\u003eIs the bend pipe included?\u003c\/h3\u003e\n\u003cp\u003eNo bend pipe is shown or confirmed as included.\u003c\/p\u003e\n\n\u003ch3\u003eIs the exhaust clamp included?\u003c\/h3\u003e\n\u003cp\u003eThe clamp is not confirmed from the available package photographs. Package contents should be checked before dispatch.\u003c\/p\u003e\n\n\u003ch3\u003eIs this a three-filter silencer?\u003c\/h3\u003e\n\u003cp\u003eThe internal filter or baffle count is not confirmed for HKM4A.\u003c\/p\u003e\n\n\u003ch3\u003eWhat sound does it produce?\u003c\/h3\u003e\n\u003cp\u003eThe exact sound has not yet been independently tested by Under The Hood, so no unsupported loudness or bass claim is made.\u003c\/p\u003e\n\n\u003ch3\u003eIs the baffle removable?\u003c\/h3\u003e\n\u003cp\u003eNot confirmed.\u003c\/p\u003e\n\n\u003ch3\u003eIs it made of stainless steel?\u003c\/h3\u003e\n\u003cp\u003eThe base material has not been independently verified, so stainless-steel construction is not claimed.\u003c\/p\u003e\n\n\u003ch3\u003eWill it improve pickup, power or mileage?\u003c\/h3\u003e\n\u003cp\u003eNo pickup, horsepower, torque or mileage improvement is claimed without controlled testing.\u003c\/p\u003e\n\n\u003ch3\u003eDoes it require modification?\u003c\/h3\u003e\n\u003cp\u003eNot confirmed. The inlet and bracket measurements should be compared before installation.\u003c\/p\u003e\n\n\u003ch3\u003eCan it be returned after installation?\u003c\/h3\u003e\n\u003cp\u003ePlease review the current Under The Hood return policy before ordering. Installed or used exhausts can show immediate fitting, carbon and heat marks.\u003c\/p\u003e\n\n\u003ch2\u003eBuyer Search Names\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHKK Indore HKM4A\u003c\/li\u003e\n  \u003cli\u003eHKM4A silencer\u003c\/li\u003e\n  \u003cli\u003eHKK Reborn silencer\u003c\/li\u003e\n  \u003cli\u003eClassic 350 Reborn black silencer\u003c\/li\u003e\n  \u003cli\u003eClassic 350 J-Series exhaust\u003c\/li\u003e\n  \u003cli\u003eReborn aftermarket silencer\u003c\/li\u003e\n  \u003cli\u003eClassic 350 J-Series muffler\u003c\/li\u003e\n  \u003cli\u003eBlack bottle silencer\u003c\/li\u003e\n  \u003cli\u003eRB SP CP 57 silencer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003csmall\u003eRoyal Enfield is a trademark of its respective owner. This is an aftermarket product manufactured or marketed under the HKK Indore brand and is not a Royal Enfield genuine spare part.\u003c\/small\u003e\u003c\/p\u003e","brand":"HKK Indore","offers":[{"title":"Default Title","offer_id":51654781108519,"sku":"HKM4B","price":0.0,"currency_code":"INR","in_stock":false}],"url":"https:\/\/underthehood.co.in\/products\/hkk-indore-hkm4a-black-silencer-royal-enfield-classic-350-reborn-j-series","provider":"UNDER THE HOOD","version":"1.0","type":"link"}