{"product":{"id":10933086454102,"title":"MST Performance Cold Air Intake System – BMW X3 M40i G01 3.0T B58 2021+ | MST-BW-X301","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eThe X3 M40i is a 3.0T B58 straight six wearing sensible SUV clothes, and its restrictive standard air box keeps the disguise complete. This MST Performance cold air intake system replaces that box with precision-engineered aluminium pipework, built to speed airflow into the turbo with minimal turbulence. The result is an M Performance SUV that finally sounds the part under load while staying quiet on the school run. Fits X3 M40i (G01) and X4 M40i (G02) from 2021 on, with all fittings for a direct OEM-replacement install.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eX3 M40i owners who want the B58's character to survive the SUV packaging\u003c\/li\u003e\n\u003cli\u003eX4 M40i drivers covered by the same fitment\u003c\/li\u003e\n\u003cli\u003eTuned M40i builds freeing the intake side to match the software\u003c\/li\u003e\n\u003cli\u003eAn engine-bay upgrade from factory plastics to aluminium hard pipe\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eM Performance Sound To Match The Badge\u003c\/h2\u003e\u003cp\u003eThe B58 responds to breathing work wherever it is fitted, and MST apply their usual design brief here: accelerate the air, cut turbulence, remove restriction, build with top-quality components. On the M40i pair the reward is twofold - a cleaner intake route feeding the six, and an induction note that separates the M Performance cars from the rest of the range the moment you accelerate.\u003c\/p\u003e\u003ch2\u003eKey Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: MST Performance\u003c\/li\u003e\n\u003cli\u003eProduct Type: Cold air intake system\u003c\/li\u003e\n\u003cli\u003eSKU: MST-BW-X301\u003c\/li\u003e\n\u003cli\u003eVehicle Application: BMW X3 M40i G01 and X4 M40i G02, 3.0T B58, 2021 onwards\u003c\/li\u003e\n\u003cli\u003eMaterial: Aluminium intake pipework\u003c\/li\u003e\n\u003cli\u003eIncluded Items: All fittings for a direct OEM-replacement install\u003c\/li\u003e\n\u003cli\u003eFitment type: vehicle and engine specific\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eFor the 3.0T B58 in the X3 M40i (G01) and X4 M40i (G02), 2021 on. The 2.0T B48 X3\/X4 uses the \u003ca href=\"\/products\/mst-performance-cold-air-intake-system-bmw-x3-f97-g01-g08-2-0t-b48-2018-mst-bw-x302\"\u003eMST B48 X3\/X4 kit\u003c\/a\u003e, and X3M Competition cars run the S58 - a different engine again. Confirm your model badge and the part number before ordering.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eMST Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eCold air intake system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eMST-BW-X301\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminium intake pipework\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Applications\u003c\/td\u003e\n\u003ctd\u003eBMW X3 M40i G01 3.0T B58 2021+; BMW X4 M40i G02 3.0T B58 2021+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Items\u003c\/td\u003e\n\u003ctd\u003eAll fittings for a direct OEM-replacement install\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs this the right kit for an X3M Competition?\u003c\/h3\u003e\u003cp\u003eNo - the X3M runs the S58 engine. This kit is for the M40i models with the 3.0T B58 from 2021 on.\u003c\/p\u003e\u003ch3\u003eWhat difference will I actually hear?\u003c\/h3\u003e\u003cp\u003eA stronger, cleaner induction note under load in place of the muted standard air box, with refinement essentially unchanged at a cruise.\u003c\/p\u003e","vendor":"MST Performance","product_type":"Induction Kit","created_at":"2026-07-03T13:00:37+01:00","handle":"mst-performance-cold-air-intake-system-bmw-x3-m40i-g01-3-0t-b58-2021-mst-bw-x301","updated_at":"2026-08-21T10:30:37+01:00","published_at":"2026-07-03T13:00:37+01:00","template_suffix":null,"published_scope":"global","tags":"brand:mst-performance, cat:air-intake, dept:performance-parts, fits:bmw-x3, fits:bmw-x4, make:bmw, type:induction-kit","variants":[{"id":54418537906518,"product_id":10933086454102,"title":"Default Title","price":"438.39","sku":"MST-BW-X301","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default 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