K&N Replacement Air Filter For Audi RS4, S4, RS5 & S5 (B9) G26 4 SERIES 330d including Mild-Hybrid and xDrive

330d including Mild-Hybrid and xDrive where applicable

Designed specifically for the F30 bootlid for a tight

belt drive CVT oil

F32 front strut leg

high-flow fueling on BMW straight-six turbo models with this Precision Raceworks upper-mount port injection feed hose

K&N Replacement Air Filter For Audi RS4, S4, RS5 & S5 (B9) G26 4 SERIES 330d including Mild-Hybrid and xDriveEnhance the performance of your Audi B9 RS4, RS5, S5 & S4 with the K&N Replacement Air Filter. Designed for optimal airflow and filtration, this high quality filter boosts engine efficiency and power. Enjoy improved throttle response and acceleration while maintaining superior engine protection. Easy to install and built to last, the K&N Replacement Air Filter is a must have upgrade for Audi enthusiasts seeking peak performance from their vehicle.