Boost your engine's performance effortlessly with a high-grade air filter upgrade from MAD. With enhanced flow and filtration over the standard OEM paper filters, this budget-friendly upgrade promises noticeable performance gains. It is directly compatible with the factory F97 X3M / F98 X4M airbox, making this set of drop-in high flow air filters your key to unlocking maximum airflow for the platform. Features: More Power: Max gains of 10 WHP and 10 lb-ft of torque More Flow: 15-20% more Designed to fit the factory air box Multi-layered cotton deep pleats for increased flow and superior filtration. Steel wire mesh for strength and resistance to dents. Full set of 4 individual filters.