BEATRUSH Air Intake Box Kit Subaru 2002 2007 WRX STi 2004 2007 INTERIOR Beatrush rear performance bar joints 86 [ZN6] Beatrush rear performance bar joints the rear strut side (rear seat back anchor part) and the floor with D section aluminum oval shaft (V letter) and steel oval shaft (floor lateral bar) to make the rear opening large RX 7 and increase the body rigidity and fully demonstrate the characteristics of FR cars Partitions the cockpit and trunk Provides clean interior look for gutted cars Mounts with rivets or screws Retains use of rear seats (if installed) Heat soak is prevented by using an aluminum heat shield that allows easy access to the air filter The Beatrush air intake box kit is the perfect unit to increase air flow in order to gain additional power from your EJ motor