K&N Air Filter Foam Wrap (25-3770) Audi > A4 > (B9.5) 2021-2025 > 2.0 TSI Unlike many oil cooler kits

Unlike many oil cooler kits

to reduce drivetrain deflection and the potential for wheel-hop during hard launches

Brake-In™ coating for quick bedding

The pipe to the filter is hand fabricated and features a precision machined MAF boss so that the cars original MAF can simply be bolted on to the new intake

K&N Air Filter Foam Wrap (25-3770) Audi > A4 > (B9.5) 2021-2025 > 2.0 TSI Unlike many oil cooler kitsThe K&N Airforce Pre Cleaner is a specially designed foam filter wrap made to extend the service interval of your K&N air filter when used in very dusty conditions. The Airforce Pre Cleaner is designed to be cleaned with K&N Cleaner or soap & water. Red colored Airforce pre cleaners are oiled with K&N air filter oil after they are cleaned. They are made from large, open cell foam. Gray colored Airforce pre cleaners do not use oil. They have smaller