Direct-fit cotton gauze panel filter for BMW N55 engines in F20, F21, F30, F31, F32 and F33 chassis - including M135i, M235i, 335i and 435i models. Drops straight into the OE airbox; no cutting, no brackets, no remap.
Lab-tested to deliver up to +15 Nm torque on stock N55. Sharper throttle response, richer induction note and better turbo breathing - all without compromising filtration.
Washable and reusable: Clean every 15,000 miles, lasts the engine’s life
No fitment guesswork: Designed specifically for UK-spec N55 airboxes
Fits fast road and track day builds: A genuine stage 1 upgrade that works with stock or mild ECU tuning
