SPL Parts Rear Spherical Lower Control Arm Knuckle Bushings - BMW M2/M3/M4 (G87/G80/G82/G83)

OVERVIEW

These Rear Lower Control Arm Knuckle Bushings replace the rubber factory bushing attaching the lower control arm to the rear knuckle with a spherical bearing. The stock rubber bushing is a significant source of rear-end compliance — under cornering load it deflects, allowing unwanted camber and toe change. The spherical replacement locks the geometry down for sharper, more predictable rear grip.

SPECS

• Spherical bearing replaces the factory rubber knuckle bushing
• Eliminates rear lower control arm deflection under load
• Reduces unwanted camber and toe change while cornering
• Wide chassis compatibility across BMW rear-suspension platforms
• Designed and built in the USA
• Sold as a set

PARTS INCLUDED

• 1x set of SPL rear lower control arm knuckle bushings with hardware

TECH RESOURCES

• A professional wheel alignment is required after installation
• Pairs with our Rear Upper Arms, Rear Traction Links, and Rear Toe Links
• Spherical bearings transmit more noise and vibration than rubber bushings — expected on a performance component
• Professional installation recommended — bushing replacement requires a press
• Installation instructions (PDF): SPL RLCB E9X Install Guide

PART NUMBER

• SPL RLCB E9X

VEHICLE APPLICATIONS