IC S63TU F1X ApexBuilt Dual Competition Intercooler Set BMW F10 M5 Evolve Catless Turbo Downpipes (F1X M5 M6) Hack Engineering ESS Tuning Catless and HiFlow Catted Downpipes F1X M5 M6 [FIRST LOOK] ESS Tuning Catless and HiFlow Catted Downpipes F1X M5 M6 [FIRST LOOK]. Looking for a simple yet effective upgrade to improve airflow and unlock extra performance from your BMW? The MMX Performance Cotton Panel Air Filters are a direct replacement for the restrictive OEM paper filters, offering improved breathing for both S55 and S63 powered models. Designed as a true drop in solution, these filters install in approximately 10 minutes and can easily be returned to stock if needed. Each filter is fully washable and reusable, ensuring long term value and performance. By reducing airflow restrictions, these filters provide measurable gains in power and torque while also enhancing induction sound. Developed to OEM standards for fitment, quality, and durability, the MMX filters slot seamlessly into your factory airboxes while delivering the performance edge enthusiasts demand. Sold as a pair. Why This Upgrade Is Needed OEM paper filters restrict airflow as they become dirty, reducing power and response. The MMX cotton gauze filters significantly increase airflow, letting your S55 or S63 engine breathe better and perform at its peak. They also save money over time because theyre washable and reusable instead of needing frequent replacement. Highlights Direct replacement for OEM paper filters Increased airflow for improved power and response Washable and reusable cotton gauze construction OEM fit and durability for factory airboxes Enhanced induction sound Vehicle Fitment F87 M2 Competition CS (S55) F80 M3 (S55) F82 F83 M4 (S55) F10 M5 (S63) F06 F12 F13 M6 (S63) Installation and Notes True drop in design Approximate install time: 10 minutes Easily returned to stock if needed Sold as a pair