K&N OE Replacement Performance Panel Air Filter - Audi S4/RS4 B9 Quattro milltek-variant-C8 4.0 V8 bi-turbo (Non OPF/GPF Models - USA/ROW Models) 2020-2023 Guarantees consistently good engine performance

Guarantees consistently good engine performance

A must for any FWD car be it road

Reduced engine movement will improve gear shift quality and throttle response

So it is easy to influence the steering behaviour

so is completely reversible if need be and includes all fixtures and fittings

K&N OE Replacement Performance Panel Air Filter - Audi S4/RS4 B9 Quattro milltek-variant-C8 4.0 V8 bi-turbo (Non OPF/GPF Models - USA/ROW Models) 2020-2023 Guarantees consistently good engine performanceThe K&N OE Replacement Cotton Gauze Performance Air Filter designed to increase horsepower and acceleration while providing excellent filtration. K&N air filters are covered by the famous K&N Million Mile Limited Warranty and will be the last air filter your car will ever need. Both washable & reusable, and is designed to directly fit into the OE factory air box. note: image is for illustration purposes and may differ on delivery