{"product_id":"genuine-bmw-n54-n55-downpipe-gasket-series-1-3-5-7-x1-x6-z4","title":"Genuine BMW Downpipe to Mid-Pipe Exhaust Gasket N54\/N55 | OEM 18307553603 | Fits 1\/3\/5\/7 Series, X1, X6, Z4 (E82 E88 E90 E91 E92 E93 E60 E61 F01 F02 E84 E71 E89)","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003cp\u003e\u003cstrong\u003eOEM BMW exhaust joint sealing ring for turbocharged N54 and N55 engines\u003c\/strong\u003e. This factory BMW seal sits between the front pipe and centre section to create a leak-free connection, keeping boost response crisp and exhaust fumes out of the cabin. Perfect when refreshing a tired system or installing performance front pipes, sports cat systems or catless pipes on 135i, 335i, 535i, 740i, X1 35i, X6 35i and Z4 35i models.\u003c\/p\u003e\n\n  \u003cp\u003ePart number: \u003cstrong\u003e18307553603\u003c\/strong\u003e  - also searched as \u003cstrong\u003e18 30 7 553 603\u003c\/strong\u003e. Genuine original equipment for precise fit, long service life and a reliable gas-tight seal.\u003c\/p\u003e\n\n  \u003ch3\u003eWhy enthusiasts choose this OE sealing ring\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eOriginal BMW component - exact dimensions for the turbo outlet to centre pipe join\u003c\/li\u003e\n    \u003cli\u003ePrevents blow-by, soot marks and exhaust smells caused by a tired or crushed gasket\u003c\/li\u003e\n    \u003cli\u003eIdeal when fitting high-flow catted front pipes or decat systems to N54B30 and N55B30 engines\u003c\/li\u003e\n    \u003cli\u003eKeeps back-pressure and spool consistent for smooth power delivery and stable O2 sensor readings\u003c\/li\u003e\n    \u003cli\u003eStraight swap OE part - no guesswork, no trimming, no drama\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003eWe fit these in-house at MJ Modifications and they simply work. Our customers report clean flanges, zero leaks and trouble-free installation every time. If you are chasing reliability on a tuned BMW, this is the small part that makes a big difference.\u003c\/p\u003e\n\n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cp\u003eFor BMW vehicles equipped with the N54 or N55 engine only. Typical applications include:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 Series 135i - E82 Coupe, E88 Convertible\u003c\/li\u003e\n    \u003cli\u003e3 Series 335i - E90 Saloon, E91 Touring, E92 Coupe, E93 Convertible\u003c\/li\u003e\n    \u003cli\u003e5 Series 535i - E60 Saloon LCI, E61 Touring LCI\u003c\/li\u003e\n    \u003cli\u003e7 Series 740i - F01, F02\u003c\/li\u003e\n    \u003cli\u003eX1 xDrive35i - E84\u003c\/li\u003e\n    \u003cli\u003eX6 xDrive35i - E71\u003c\/li\u003e\n    \u003cli\u003eZ4 sDrive35i \/ sDrive35is - E89\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eIf you are unsure, we will verify fitment before dispatch. Add your UK registration or last 7 of the VIN at checkout.\u003c\/p\u003e\n\n  \u003ch3\u003eWhat this gasket solves\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eStops leaks at the turbo down pipe to middle section flange\u003c\/li\u003e\n    \u003cli\u003ePrevents CELs caused by exhaust leaks influencing lambda readings\u003c\/li\u003e\n    \u003cli\u003eReduces metallic rasp and unwanted whistle from a poor seal\u003c\/li\u003e\n    \u003cli\u003eProtects your performance investment during down pipe upgrades\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eFitting and support\u003c\/h3\u003e\n  \u003cp\u003eWant it installed by specialists We can help. MJ Modifications in Warwickshire offers professional fitting for exhaust and turbo hardware. Request a quote at \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\u003c\/p\u003e\n\n  \u003ch3\u003eWarranty\u003c\/h3\u003e\n  \u003cp\u003eTwo-year manufacturer warranty for UK customers and one-year for international customers when a compatible VIN is provided at checkout.\u003c\/p\u003e\n\n  \u003ch3\u003eAlso known as - common search queries\u003c\/h3\u003e\n  \u003cp\u003eBMW exhaust seal ring N54, BMW exhaust seal ring N55, BMW front pipe coupling ring, BMW flange ring 18307553603, BMW donut gasket turbo outlet, 135i exhaust gasket, 335i exhaust gasket, 535i exhaust gasket, 740i exhaust gasket, Z4 35i exhaust gasket, X6 35i exhaust gasket, N54\/N55 turbo outlet gasket, BMW centre section joint ring, BMW OE exhaust connector, E82 E88 E90 E91 E92 E93 E60 E61 F01 F02 E84 E71 E89 exhaust seal, high flow cat pipe gasket, catless pipe gasket.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BMW","offers":[{"title":"Default Title","offer_id":55975969423746,"sku":null,"price":18.19,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/Inkeds-l1600_1__LI_1946x_13f0ae1f-52ad-42bc-b44a-08d6fb2612e9.jpg?v=1763324537","url":"https:\/\/mjmodifications.co.uk\/products\/genuine-bmw-n54-n55-downpipe-gasket-series-1-3-5-7-x1-x6-z4","provider":"MJ Modifications","version":"1.0","type":"link"}