HKS RS VAB VAF WRX STI EJ257

The HKS Racing Suction Air Filter is designed to provide maximum airflow, boosting engine performance, enhancing throttle response, and increasing horsepower. It features a Hyper Stealth Frame (27% intake efficiency increase), high-performance 2-layer polyurethane foam with high-viscosity adhesive for superior filtration, optimized suction pipes for naturally aspirated and turbocharged engines, flexible frame support for easy maintenance, a 'Super Lip Funnel' to maximize air intake surface area, 16 parabolic frames for lightweight construction and smooth airflow, and direct throttle mounting to eliminate restrictions. ECU setting is required when removing the air duct.