{"product_id":"royal-enfield-581736c-blow-moulded-resonator-box-bullet-350-uce-electra-classic-350","title":"Genuine Royal Enfield 581736\/C Blow Moulded Resonator Box (Intake Resonator \/ Airbox Resonator Chamber) – Bullet 350 UCE (KS\/ES), Electra 350 UCE (ES), Classic 350","description":"\u003cp data-start=\"332\" data-end=\"748\"\u003eRoyal Enfield \u003cstrong data-start=\"346\" data-end=\"358\"\u003e581736\/C\u003c\/strong\u003e is the \u003cstrong data-start=\"366\" data-end=\"400\"\u003eOEM Blow Moulded Resonator Box\u003c\/strong\u003e—also commonly searched as the \u003cstrong data-start=\"431\" data-end=\"451\"\u003eintake resonator\u003c\/strong\u003e, \u003cstrong data-start=\"453\" data-end=\"481\"\u003eairbox resonator chamber\u003c\/strong\u003e, or \u003cstrong data-start=\"486\" data-end=\"509\"\u003eintake silencer box\u003c\/strong\u003e. It is a genuine Royal Enfield spare part, built to factory dimensions and intended to control intake resonance (reducing intake drone), while supporting stable airflow routing in the intake system. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"750\" data-end=\"1219\"\u003eReplace this resonator box if your existing unit is cracked, deformed by heat, damaged during repairs, or causing loose-fit vibration\/rattles near the side panel\/airbox area. Many aftermarket “resonator boxes” are generic shells with inconsistent plastic quality and fitment—leading to air leaks, rubbing, or repeated mounting issues. This OEM part is listed as identical to the factory-fitted component when the vehicle was new.\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"1549\" data-end=\"1587\"\u003eKey Features \u003c\/h2\u003e\n\u003cul data-start=\"1588\" data-end=\"2361\"\u003e\n\u003cli data-start=\"1588\" data-end=\"1676\"\u003e\n\u003cp data-start=\"1590\" data-end=\"1676\"\u003eGenuine Royal Enfield part number \u003cstrong data-start=\"1624\" data-end=\"1636\"\u003e581736\/C\u003c\/strong\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1677\" data-end=\"1764\"\u003e\n\u003cp data-start=\"1679\" data-end=\"1764\"\u003eOfficial name: \u003cstrong data-start=\"1694\" data-end=\"1724\"\u003eBLOW MOULDED RESONATOR BOX\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1765\" data-end=\"1902\"\u003e\n\u003cp data-start=\"1767\" data-end=\"1902\"\u003eDealer-listed fitment for \u003cstrong data-start=\"1793\" data-end=\"1819\"\u003eBullet 350 UCE (KS\/ES)\u003c\/strong\u003e, \u003cstrong data-start=\"1821\" data-end=\"1845\"\u003eElectra 350 UCE (ES)\u003c\/strong\u003e, \u003cstrong data-start=\"1847\" data-end=\"1862\"\u003eClassic 350\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1903\" data-end=\"1991\"\u003e\n\u003cp data-start=\"1905\" data-end=\"1991\"\u003eOE-grade moulding for correct fitment and mounting alignment (reduces jugaad clamps)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1992\" data-end=\"2068\"\u003e\n\u003cp data-start=\"1994\" data-end=\"2068\"\u003eHelps reduce intake resonance\/harsh induction noise (resonator function)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2069\" data-end=\"2158\"\u003e\n\u003cp data-start=\"2071\" data-end=\"2158\"\u003eIdeal replacement for cracked\/damaged resonator box to avoid rattles and misalignment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2159\" data-end=\"2240\"\u003e\n\u003cp data-start=\"2161\" data-end=\"2240\"\u003eBetter reliability vs generic aftermarket plastic that can warp or fit poorly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2241\" data-end=\"2361\"\u003e\n\u003cp data-start=\"2243\" data-end=\"2361\"\u003eMRP\/part existence is also reflected in distributor price lists (sanity check) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"2363\" data-end=\"2419\"\u003eCompatibility Table \u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"2420\" data-end=\"3031\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2420\" data-end=\"2462\"\u003e\n\u003ctr data-start=\"2420\" data-end=\"2462\"\u003e\n\u003cth data-start=\"2420\" data-end=\"2428\" data-col-size=\"sm\"\u003eModel\u003c\/th\u003e\n\u003cth data-start=\"2428\" data-end=\"2442\" data-col-size=\"sm\"\u003eEngine Type\u003c\/th\u003e\n\u003cth data-start=\"2442\" data-end=\"2453\" data-col-size=\"sm\"\u003eBS Stage\u003c\/th\u003e\n\u003cth data-start=\"2453\" data-end=\"2462\" data-col-size=\"sm\"\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2481\" data-end=\"3031\"\u003e\n\u003ctr data-start=\"2481\" data-end=\"2619\"\u003e\n\u003ctd data-start=\"2481\" data-end=\"2520\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2483\" data-end=\"2519\"\u003eBullet 350 UCE (Kick Start \/ KS)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2520\" data-end=\"2530\" data-col-size=\"sm\"\u003eUCE 350\u003c\/td\u003e\n\u003ctd data-start=\"2530\" data-end=\"2565\" data-col-size=\"sm\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2565\" data-end=\"2619\" data-col-size=\"sm\"\u003e\n\u003cbr\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2620\" data-end=\"2762\"\u003e\n\u003ctd data-start=\"2620\" data-end=\"2663\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2622\" data-end=\"2662\"\u003eBullet 350 UCE (Electric Start \/ ES)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2663\" data-end=\"2673\" data-col-size=\"sm\"\u003eUCE 350\u003c\/td\u003e\n\u003ctd data-start=\"2673\" data-end=\"2708\" data-col-size=\"sm\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2708\" data-end=\"2762\" data-col-size=\"sm\"\u003e\n\u003cbr\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2763\" data-end=\"2906\"\u003e\n\u003ctd data-start=\"2763\" data-end=\"2807\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2765\" data-end=\"2806\"\u003eElectra 350 UCE (Electric Start \/ ES)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2807\" data-end=\"2817\" data-col-size=\"sm\"\u003eUCE 350\u003c\/td\u003e\n\u003ctd data-start=\"2817\" data-end=\"2852\" data-col-size=\"sm\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2852\" data-end=\"2906\" data-col-size=\"sm\"\u003e\n\u003cbr\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2907\" data-end=\"3031\"\u003e\n\u003ctd data-start=\"2907\" data-end=\"2925\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"2909\" data-end=\"2924\"\u003eClassic 350\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2925\" data-end=\"2960\" data-col-size=\"sm\"\u003e❓ Not stated in verified sources\u003c\/td\u003e\n\u003ctd data-start=\"2960\" data-end=\"2975\" data-col-size=\"sm\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd data-start=\"2975\" data-end=\"3031\" data-col-size=\"sm\"\u003e\n\u003cbr\u003e\u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 data-start=\"3033\" data-end=\"3114\"\u003e\u003cspan style=\"color: rgb(249, 6, 6);\"\u003ePLEASE CHECK PART NUMBER NEFORE PURCHASE \u003c\/span\u003e\u003c\/h3\u003e\n\u003ch3 data-start=\"3033\" data-end=\"3114\"\u003e❓ Not confirmed (do not list as compatible \/ verify by VIN before ordering)\u003c\/h3\u003e\n\u003cul data-start=\"3115\" data-end=\"3347\"\u003e\n\u003cli data-start=\"3115\" data-end=\"3152\"\u003e\n\u003cp data-start=\"3117\" data-end=\"3152\"\u003eClassic 350 \u003cstrong data-start=\"3129\" data-end=\"3150\"\u003eReborn (J-Series)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3153\" data-end=\"3180\"\u003e\n\u003cp data-start=\"3155\" data-end=\"3180\"\u003eBullet 350 \u003cstrong data-start=\"3166\" data-end=\"3178\"\u003eJ-Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3181\" data-end=\"3347\"\u003e\n\u003cp data-start=\"3183\" data-end=\"3347\"\u003eHunter 350 \/ Meteor 350 \/ Himalayan \/ Scram \/ 650 Twins\u003cbr data-start=\"3238\" data-end=\"3241\"\u003e(Several marketplace listings mention other models, but they are not treated as verified fitment sources.)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"3349\" data-end=\"3362\"\u003eVariants\u003c\/h2\u003e\n\u003cul data-start=\"3363\" data-end=\"3481\"\u003e\n\u003cli data-start=\"3363\" data-end=\"3481\"\u003e\n\u003cp data-start=\"3365\" data-end=\"3481\"\u003e\u003cstrong data-start=\"3365\" data-end=\"3390\"\u003eNo variants confirmed\u003c\/strong\u003e for this part number (single SKU: \u003cstrong data-start=\"3425\" data-end=\"3437\"\u003e581736\/C\u003c\/strong\u003e). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"3483\" data-end=\"3498\"\u003eFAQs \u003c\/h2\u003e\n\u003cp data-start=\"3499\" data-end=\"3688\"\u003e\u003cstrong data-start=\"3499\" data-end=\"3535\"\u003e1) What is part number 581736\/C?\u003c\/strong\u003e\u003cbr data-start=\"3535\" data-end=\"3538\"\u003eIt is the \u003cstrong data-start=\"3548\" data-end=\"3578\"\u003eBLOW MOULDED RESONATOR BOX\u003c\/strong\u003e (intake resonator\/airbox resonator chamber), genuine Royal Enfield. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3690\" data-end=\"3865\"\u003e\u003cstrong data-start=\"3690\" data-end=\"3727\"\u003e2) Which bikes does 581736\/C fit?\u003c\/strong\u003e\u003cbr data-start=\"3727\" data-end=\"3730\"\u003e\u003cstrong data-start=\"3761\" data-end=\"3822\"\u003eBullet 350 UCE (KS\/ES), Electra 350 UCE (ES), Classic 350\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"3867\" data-end=\"4095\"\u003e\u003cstrong data-start=\"3867\" data-end=\"3909\"\u003e3) Does this part improve performance?\u003c\/strong\u003e\u003cbr data-start=\"3909\" data-end=\"3912\"\u003eIt is primarily a factory intake resonance\/control component. Replace it for correct fitment, reduced rattles, and proper intake routing—especially if the old box is cracked or loose.\u003c\/p\u003e\n\u003cp data-start=\"4097\" data-end=\"4257\"\u003e\u003cstrong data-start=\"4097\" data-end=\"4146\"\u003e4) Will it fit Classic 350 Reborn (J-Series)?\u003c\/strong\u003e\u003cbr data-start=\"4146\" data-end=\"4149\"\u003eNot confirmed. Order only if your Royal Enfield parts catalog\/VIN lookup matches \u003cstrong data-start=\"4230\" data-end=\"4242\"\u003e581736\/C\u003c\/strong\u003e for your bike.\u003c\/p\u003e\n\u003cp data-start=\"4259\" data-end=\"4502\"\u003e\u003cstrong data-start=\"4259\" data-end=\"4302\"\u003e5) What should I check before ordering?\u003c\/strong\u003e\u003cbr data-start=\"4302\" data-end=\"4305\"\u003eConfirm your bike is in the verified model set above and compare the old part\/connector\/mounting layout. If your mechanic has removed the resonator earlier, confirm the mounting points still exist.\u003c\/p\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":50893570015527,"sku":null,"price":190.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/OEM_intake_resonator_airbox_resonator_chamber_581736_C_bullet_350_UCE_ES.png?v=1767728944","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-581736c-blow-moulded-resonator-box-bullet-350-uce-electra-classic-350","provider":"UNDER THE HOOD","version":"1.0","type":"link"}