K&N Engineering RK-3913 RK Series Billet Air Filter Assembly - Grooved Round

Chrome-plated polished billet aluminum cover. Round or Teardrop, Flames, Ball-Grooved or Mirror finish. Includes K and N Original High-Flow Air Filter. Provides a substantial increase in horsepower. Pleated design provides optimum airflow. Powder-coated billet aluminum backing plate. Spacers and hardware included. Specially designed drycharger extends service intervals and is pre-treated to repel water; sold separately Street Legal in Most States. Not Legal for Use in CA and Other States Adopting CA Emissions Standards.