Rear Left Upright base assembly

The rear left upright base assembly is the structural billet aluminum housing at the core of the rear left suspension corner on the Rush SR. It serves as the central junction point connecting the upper and lower A-arms (via ball joint pins), the wheel bearing hub assembly, and the toe link — transferring all suspension loads between the chassis and the wheel.

This is the left-side-specific component; the geometry and mounting points are not interchangeable with the right side. Shoulder bolts are used at the upright base mounting points to provide precise alignment during installation. Related components including the ball joint pins, ball joint spacers, and wheel bearing hub assembly are available separately in the parts store.

This is an OEM replacement part — it is the same assembly that comes standard on the Rush SR. Replace if the housing is damaged, cracked, or shows signs of impact deformation that could affect suspension geometry.