SPL Parts 2020+ Toyota GR Supra (A90) / 2019+ BMW Z4 (G29) Rear Upper Lateral Links

SPL RUA G29 Rear Upper Lateral Links for 2020+ Toyota GR Supra (A90) / 2019+ BMW Z4 (G29)

The SPL RUA G29 Rear Upper Lateral Links are engineered for the Toyota GR Supra A90 and BMW Z4 G29, along with the BMW G20/G21/G22/G23/G24 3-Series/4-Series and G42 2-Series that share the same rear suspension platform. The factory OEM rear upper lateral arm relies on an eccentric washer adjustment with a limited correction range that becomes inadequate once the vehicle is lowered. The SPL RUA G29 provides a wide rear camber adjustment range through gun-drilled 2024 aluminum links, 6061-T6 aluminum 360-degree rotating clamps, and Teflon-lined FK heim joints. Setting camber requires only a 3/16 inch allen key and provides repeatable, locked results without the slippage risk of eccentric bolts. Whether correcting inside-edge tire wear on a street Supra or dialing in aggressive negative camber for circuit work, the SPL RUA G29 provides the precision and durability required.

Features and Benefits

• Gun-drilled 2024 aluminum links minimize unsprung weight while maintaining rigidity
• 360-degree 6061-T6 aluminum rotating clamp design for tool-efficient camber adjustment with a 3/16 in. allen key
• Blue anodized titanium socket-head cap screws reduce weight and resist corrosion
• Low-friction 3-piece Teflon-lined FK heim joints and rod ends eliminate bushing deflection and alignment drift under load
• PTFE liner is self-lubricating and self-cleaning, operating from -65 to 325 degrees F
• Replaces the factory rear upper lateral arm (camber arm) and rear upper trailing arm (traction arm)
• Compatible with all GR Supra A90, BMW Z4 G29, and BMW G20/G21/G22/G23/G24/G42 chassis variants
• Sold as a pair, made in the USA

Fitment

Specifications

What Is Included

• 2 x SPL RUA G29 Rear Upper Lateral Links (one per side)
• 6061-T6 aluminum 360-degree rotating clamps
• Blue anodized titanium socket-head cap screws
• 3-piece Teflon-lined FK heim joints / rod ends pre-installed
• Installation instructions

Frequently Asked Questions

What rear camber adjustment does the SPL RUA G29 provide on the Toyota GR Supra?
The SPL RUA G29 provides a wide rear camber range well beyond the OEM eccentric washer limit on the A90 GR Supra. The factory adjustment is frequently insufficient to return camber to spec on lowered cars. The SPL link allows precise, locked rear camber settings for street or track.

Does the SPL RUA G29 fit the BMW Z4 G29?
Yes. The SPL RUA G29 was designed to cover both the 2020+ Toyota GR Supra A90 and the 2019+ BMW Z4 G29, which share the same rear suspension architecture. Both applications receive identical links.

Does the SPL RUA G29 fit BMW 3-Series, 4-Series, and 2-Series?
Yes. The SPL RUA G29 also fits the G20/G21 3-Series, G22/G23 4-Series, G24 Gran Coupe, and G42 2-Series (2022+) due to shared rear suspension geometry across the BMW G-series platform.

Is the SPL RUA G29 street safe for a daily-driven GR Supra?
Yes. The FK heim joints operate silently with a self-lubricating PTFE liner rated from -65 to 325 degrees F. The SPL RUA G29 is appropriate for daily-driven GR Supras and BMWs and requires no special maintenance beyond periodic fastener inspection.

Does installing the SPL RUA G29 void my Toyota or BMW warranty?
Under the Magnuson-Moss Warranty Act, neither Toyota nor BMW can void unrelated warranty coverage simply because an aftermarket part is installed. The manufacturer must demonstrate that the SPL RUA G29 directly caused the specific failure claimed.

Will the sway bar contact the SPL RUA G29 link?
On significantly lowered GR Supras and Z4s, the sway bar can come close to the rear upper arm area. SPL Parts notes this as a factory fitment characteristic, not specific to their arm. Review clearance after lowering and consult SPL Parts tech support if needed.

How is camber set with the SPL RUA G29?
Loosen the blue titanium allen screws on both ends of the rotating clamp. Rotate the aluminum dogbone link body to thread the rod ends in or out, changing link length and rear camber. Do not exceed 0.625 inch of thread engagement. Retighten the clamp screws to 150 in-lb maximum.

Does the SPL RUA G29 require a subframe drop for installation?
The knuckle-side bolt on the factory link is very tight and may require a breaker bar. The subframe-side bolt requires briefly lowering one side of the subframe to remove. SPL recommends reinstalling the subframe bolt in the opposite direction to simplify future arm removal.

Installation Overview

1. Raise and support the rear of the vehicle; remove rear wheels.
2. Support the knuckle to prevent droop; remove the OEM lateral link at both the knuckle and subframe ends.
3. Lower one side of the subframe briefly to access and remove the subframe-side bolt if required.
4. Pre-set the SPL RUA G29 to match OEM arm length by adjusting the dogbone and rotating clamp.
5. Install the subframe end first; reinstall the bolt in the reverse direction for easier future access.
6. Connect the knuckle end and finger-tighten all hardware.
7. Torque all fasteners to SPL Parts specification; lock the rotating clamps to 150 in-lb maximum.
8. Confirm FK rod ends are centered and have full articulation at ride height before locking.
9. Reinstall wheels and lower the vehicle.
10. Perform a professional four-wheel alignment to set rear camber.
11. Re-check all fastener torques after the first 100 miles and after the first track session.

California Prop 65 Warning: This product can expose you to chemicals including lead and chromium, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.