SPL Parts BMW G8X Rear Upper Arms

Rubber should be saved for the tires. The factory rear upper arms on BMW G8X M cars including G80/G81 M3 and G82/G83/G87 M4 and M2 use soft rubber bushings that flex under load, which lets alignment and toe change right when you are asking the car to work the hardest. SPL Parts replaces those links with fully adjustable, spherical bearing components that keep the suspension honest and repeatable on both street and track.

Motorsport grade construction

Gun drilled 2024 aluminum links, SPL’s 6061-T6 rotating clamps and Teflon lined FK spherical bearings keep weight down while delivering precise, low friction movement. Stainless or titanium hardware is used throughout for strength and corrosion resistance, and every kit is designed, machined and assembled in the USA.

More camber range, less tire wear

SPL rear upper arms greatly increase the available rear camber adjustment on lowered cars, allowing you to run the negative camber needed for grip without pushing the factory eccentric bolts past their limits. They also help reduce inner shoulder tire wear by letting you fine tune the static and dynamic camber curve.

We use SPL hardware across many of our own builds because it is easy to work with, holds settings and stands up to real track mileage. If you are dialing in BMW G8X M cars including G80/G81 M3 and G82/G83/G87 M4 and M2 for serious driving, these pieces are a key part of getting the alignment and feedback you want.