The Ramair Performance Foam Induction Kit for BMW E39 5 Series (520i & 523i) replaces the restrictive OEM airbox with a free-flowing foam intake to unlock smoother airflow, sharper throttle response and a richer induction note. Using Ramair’s dual-layer foam and a rigid T304 stainless support cage, the system delivers near-unrestricted flow while maintaining the filtration levels essential for long engine life. A cold-air feed and full fitting hardware ensure an OEM-like installation and easy servicing with the Ramair CK-003 cleaning kit.
Key Features
Dual-layer high-flow foam filter for increased airflow and quicker throttle response
T304 stainless steel cage maintains filter shape and stability under load
Cold-air feed ducting supplies fresh air for consistent intake temps
Direct OEM airbox replacement for improved drivability and sound
Complete fitting kit included: clips, brackets, bolts and step-by-step instructions
Easy maintenance with Ramair CK-003 filter cleaning kit
Single-user lifetime warranty against manufacturing defects
Compatibility
BMW 5 Series (E39) – 520i, 523i Saloon and Touring petrol models. (If you’re unsure on fitment, contact us with your VIN to confirm.)
