Front Pillow Ball Top Mount — Subaru Impreza WRX STI GRB･GVB, Subaru WRX STI VAB

Camber-adjustable top mounts allow adjustment of the camber angle by moving the bearing position. This requires a large elongated hole in the top mount plate to accommodate the bearing's movement range. However, depending on driving conditions, the load transmitted from the damper can become a large external force, several times the axle load, centered on the top mount bearing. In conventional products, this causes the top mount plate to deform, curling around the elongated hole for camber adjustment. The Beatrush Pillow Ball Top Mount addresses this weakness of camber-adjustable types by doubling the plate thickness compared to conventional products (varies by model) and machining only the mounting area to the body. This prevents the bearing position from lowering and reducing damper stroke.

The bearing case, pillow ball nut, and pillow ball collar are machined from tough carbon steel (S45C) using high-precision CNC lathes. The pillow ball collar is used by inserting it into the bearing, similar to the pillow ball nut.