One of the most cost-effective improvements you can make to your car, improving power and economy. The Racingline Performance Panel Filter simply fits directly into the airbox as a direct replacement for the standard restrictive paper air filter element.
Funk Motorsport Turbo Blanket Audi S4 B9
£152.50
Racingline Performance High-Flow Replacement Filters - Audi S4 (B9)
£131.04
Racingline Performance High-Flow Replacement Filters – Audi S4 (B8)
£103.52
