SPL Parts Adjustable Rear Upper Arms for BMW G8X - SPL RUA G8X

The SPL Parts Adjustable Rear Upper Arms (RUA) for BMW G8X models are designed to restore proper rear camber and reduce tire wear on both street and track-driven vehicles. The factory BMW rear suspension features an aggressive camber curve through bump travel, which becomes especially problematic on lowered cars. Excess negative camber accelerates inside tire wear and reduces straight-line traction, while insufficient camber limits rear grip during cornering.

This complete rear upper arm kit replaces the factory rear wishbone and rear guide links, providing a wide and precise camber adjustment range while eliminating bushing deflection. SPL utilizes PTFE-lined FK spherical bearings and rod ends in place of soft factory rubber bushings to ensure smooth articulation, consistent alignment, and durability under load.

The kit combines gun-drilled 2024 aluminum traction links with a curved 6061-T6 billet aluminum rear upper camber arm. SPL’s rotating clamp and double-adjuster designs allow fast, precise camber adjustments on the car without removing the arms, reducing setup time while maintaining correct bearing orientation.

Key Features

• Wide rear camber adjustment range for street or track alignment
• Eliminates factory bushing deflection
• On-car camber adjustment with double-adjuster design
• Rotating clamp system allows fast, precise changes
• Reduced unsprung weight without compromising strength

What’s Included

• (4) Adjustable rear upper arms (complete kit for one car)
• All required hardware and spacers

Fitment

• 2022+ BMW G80 M3
• 2022+ BMW G82 M4 Coupe
• 2022+ BMW G83 M4 Convertible
• 2023+ BMW G87 M2