K&N Panel Filter - Audi S4 (B6/B7) 4.2 V8

K&N Panel Filter - Audi S4 (B6/B7) 4.2 V8

K&N panel air filters install easily into your factory airbox. The K&N filter is a permanent, high performance filter that can be cleaned, re-oiled, and used many times over. These low restriction air filters allow the engine to breath more freely, which means better throttle response and approximately 1-3HP gained throughout the rev range.