{"product_id":"performance-air-filter-for-bmw-3-series-4series-5-series-6-series-7-series","title":"Performance Air Filter for BMW 3 Series\/4Series\/5 Series\/6 Series\/7 Series Diesel","description":"\u003ch2\u003ePrecision Air Induction for the BMW N57 Diesel Platform\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho It’s For:\u003c\/strong\u003e Engineered for BMW owners running the N57 inline-six diesel powerplant across the F-Chassis range who want to optimize turbo efficiency without compromising engine longevity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe Symptom:\u003c\/strong\u003e The factory air filtration system on the N57 engine is built around a thick, restrictive paper element designed for maximum sound suppression and long service intervals. For a high-torque diesel engine, this creates a significant bottleneck. As the turbochargers attempt to spool, they have to work harder to pull air through the dense paper fibers, leading to a measurable pressure drop in the intake tract. This results in a slight delay in throttle response, especially during low-end acceleration or when merging on the highway.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe Engineering Fix:\u003c\/strong\u003e The BMC FB821\/04 filter replaces that restrictive paper with a multi-layered cotton gauze system. By using four layers of surgical-grade cotton soaked in a low-viscosity oil, we change the fluid dynamics of the intake. Instead of air hitting a paper wall, it flows through an epoxy-coated alloy mesh that creates a more laminar flow. This allows for filtration down to 7 microns—significantly tighter than the OEM 10-micron standard—while simultaneously increasing the total air volume available to the turbocharger. The result is a more efficient combustion cycle and a faster turbo spool-up.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhy Mechanics Choose This Kit\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnhanced Surface Area:\u003c\/strong\u003e The \"Full Moulding\" construction eliminates welded joints, allowing the filter to utilize the maximum possible surface area within the factory airbox for better air density.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial Durability:\u003c\/strong\u003e Unlike cheap plastic-framed filters, the rubber used by BMC is formulated to resist heat-soak and maintain a perfect seal against the airbox walls, preventing dirty air bypass.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWashable Performance:\u003c\/strong\u003e This isn’t a disposable part. Because it uses an alloy mesh and cotton gauze, it can be cleaned and re-oiled, maintaining peak flow rates for the life of the vehicle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; margin-bottom: 20px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eFitment\u003c\/td\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eBMW 3, 4, 5, 6, 7 Series (Diesel)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eEngine Platform\u003c\/td\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eN57 \/ N57S (3.0L Inline-Six Diesel)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eFactory Ratings\u003c\/td\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e258 HP - 381 HP\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003ePart Numbers\u003c\/td\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003eFB821\/04\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0; font-weight: bold;\"\u003eDimensions\u003c\/td\u003e\n    \u003ctd style=\"padding: 10px; border: 1px solid #e0e0e0;\"\u003e357mm x 149mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eCompatibility \u0026amp; OEM Reference\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFits the Following Vehicles:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBMW 3 (F30, F31, F80) 330 D (258 HP) 2012+\u003c\/li\u003e\n  \u003cli\u003eBMW 3 (F30, F31, F80) 335 DX (313 HP) 2013+\u003c\/li\u003e\n  \u003cli\u003eBMW 3 GT (F34) 330 D GRAN TOURISMO (258 HP) 2014+\u003c\/li\u003e\n  \u003cli\u003eBMW 3 GT (F34) 335 DX GRAN TOURISMO (313 HP) 2014+\u003c\/li\u003e\n  \u003cli\u003eBMW 4 (F32, F33, F36, F82) 430 D (258 HP) 2013+\u003c\/li\u003e\n  \u003cli\u003eBMW 4 (F32, F33, F36, F82) 435 D (313 HP) 2013+\u003c\/li\u003e\n  \u003cli\u003eBMW 5 (F10, F11, F18) 530 D (258 HP) 09\/2011+\u003c\/li\u003e\n  \u003cli\u003eBMW 5 (F10, F11, F18) 535 D (313 HP) 2011+\u003c\/li\u003e\n  \u003cli\u003eBMW 5 (F10, F11, F18) M 550 D (381 HP) 2012+\u003c\/li\u003e\n  \u003cli\u003eBMW 5 GT (F07GT) 530 D GRAN TOURISMO (258 HP) 2012+\u003c\/li\u003e\n  \u003cli\u003eBMW 5 GT (F07GT) 535 D GRAN TOURISMO (313 HP) 2012+\u003c\/li\u003e\n  \u003cli\u003eBMW 6 (F12, F13) 640 D (313 HP) 2011+\u003c\/li\u003e\n  \u003cli\u003eBMW 6 GC (F06GC) 640 D GRAN COUPÈ (313 HP) 2012+\u003c\/li\u003e\n  \u003cli\u003eBMW 7 (F01, F02, F03, F04) 730 D (258 HP) 2012+\u003c\/li\u003e\n  \u003cli\u003eBMW 7 (F01, F02, F03, F04) 740 D (313 HP) 2012+\u003c\/li\u003e\n  \u003cli\u003eBMW 7 (F01, F02, F03, F04) 750 D (381 HP) 2012+\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eInterchange Part Numbers:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-family: monospace; font-size: 0.9em; color: #666; background-color: #f5f5f5; padding: 10px; border-radius: 4px;\"\u003e\nFB821\/04\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eThe Performance Promise\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBuy with confidence.\u003c\/strong\u003e We understand the intricacies of BMW’s diesel engineering. Our team ensures that every part we stock provides a legitimate upgrade to the driving experience. This BMC filter is a direct-fit replacement, meaning no modification to your expensive OEM airbox is required.\u003c\/p\u003e","brand":"BMC","offers":[{"title":"Default Title","offer_id":47758419394808,"sku":"DS-BMW-FB821\/04","price":119.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/fb821-04__21232.1602802422.1280.1280.jpg?v=1767728437","url":"https:\/\/performancechiptuning.com\/products\/performance-air-filter-for-bmw-3-series-4series-5-series-6-series-7-series","provider":"Performance Chip Tuning","version":"1.0","type":"link"}