SPL Parts 2020+ Toyota GR Supra (A90) / 2019+ BMW Z4 (G29) Front Lower Control Arms

SPL FLCA G29 Front Lower Control Arms for 2020+ Toyota GR Supra (A90) / 2019+ BMW Z4 (G29)

The SPL FLCA G29 Front Lower Control Arms provide roll center, camber, and track width adjustment for the Toyota GR Supra A90 and BMW Z4 G29. The factory OEM front lower control arm rubber bushings allow alignment geometry to shift under braking and cornering loads, contributing to vague front-end response. The SPL FLCA G29 replaces these bushings with FK Rod Ends and High Misalignment Spherical Bearings to eliminate bushing flex and binding. The slotted arm body accommodates the exclusive 4130 Chromoly Double Adjuster with 360-degree rotating clamps for camber and track width adjustment without jam nuts. Stainless steel roll center spacers are included for lowered applications. SPL Parts notes that on the 2020 GR Supra and 2019 BMW Z4, the sway bar runs close to the lower arm as a factory characteristic; use the SPL CRB G29 caster monoball bushings and SPL FE G29 endlinks if sway bar clearance is a concern. The SPL FLCA G29 is sold as a pair and made in the USA.

Features and Benefits

• Roll center, camber, and track width adjustment for comprehensive front geometry tuning on the A90/G29 platform
• 6061-T6 billet aluminum construction with black anodized finish for strength and corrosion resistance
• 4130 Chromoly electroless nickel-plated Double Adjuster with gun-drilled weight reduction and 360-degree rotating clamp locking
• FK Rod Ends and High Misalignment Spherical Bearings eliminate OEM bushing flex and binding under cornering and braking loads
• Blue anodized titanium hardware reduces unsprung weight
• Stainless steel roll center spacers for correction on lowered GR Supras and Z4s
• Compatible with 2020+ Toyota GR Supra (A90) and 2019+ BMW Z4 (G29)
• Sold as a pair, made in the USA

Fitment

Specifications

What Is Included

• 2 x SPL FLCA G29 Front Lower Control Arms (one per side)
• 4130 Chromoly Double Adjusters with 360-degree rotating clamps
• Blue anodized titanium socket-head cap screws
• Stainless steel roll center spacers (multiple sizes)
• Installation instructions

Frequently Asked Questions

What adjustments does the SPL FLCA G29 provide on the Toyota GR Supra?
The SPL FLCA G29 provides front roll center correction, camber adjustment, and track width adjustment on the A90 GR Supra. These three parameters are commonly out of range on lowered Supras equipped with aftermarket coilovers.

Does the SPL FLCA G29 also fit the BMW Z4 G29?
Yes. The SPL FLCA G29 covers both the 2020+ Toyota GR Supra A90 and the 2019+ BMW Z4 G29, which share the same front suspension architecture.

Will the sway bar contact the SPL FLCA G29?
On the 2020 GR Supra and 2019 BMW Z4, the factory sway bar runs close to the front lower arm. This is a factory design characteristic that applies to the OEM arm and the SPL FLCA G29 equally. SPL Parts recommends pairing with their CRB G29 caster monoball bushings and FE G29 adjustable endlinks if clearance is a concern after lowering.

Is the SPL FLCA G29 suitable for daily street use?
Yes. Teflon-lined FK Rod Ends operate silently, are self-lubricating, and are rated from -65 to 325 degrees F. The SPL FLCA G29 is appropriate for daily-driven GR Supras and Z4s requiring proper front alignment geometry on lowered rides.

Does installing the SPL FLCA G29 void my Toyota or BMW warranty?
Under the Magnuson-Moss Warranty Act, Toyota and BMW cannot void unrelated warranty coverage due to the installation of an aftermarket part. The manufacturer must demonstrate that the SPL FLCA G29 directly caused the specific failure claimed.

Do I need roll center spacers on a stock-height GR Supra?
For stock-height vehicles, install the SPL FLCA G29 without spacers above the bearing to maintain OEM roll center geometry. Add spacers above the bearing only when the vehicle has been lowered to correct the resulting roll center drop. Do not exceed 1/2 inch of total roll center correction.

Does the SPL FLCA G29 require a professional alignment?
Yes. A professional four-wheel alignment is required after installation to set final camber, toe, and verify caster. Bring the SPL installation instructions to ensure the alignment technician has all torque specifications and adjustment procedures.

Can the SPL FLCA G29 be paired with adjustable coilovers?
Yes. The SPL FLCA G29 is highly effective when paired with adjustable coilovers, as the coilover's ride height adjustment changes both camber and roll center, and the SPL arm allows both to be corrected independently without eccentric bolt slippage.

Installation Overview

1. Raise and support the front of the vehicle; remove front wheels.
2. Remove the OEM front lower control arm ball joint nut and the subframe mounting bolt.
3. Separate the ball joint from the knuckle using a pry bar; remove the OEM arm.
4. Pre-set the SPL FLCA G29 to match OEM arm length using the Double Adjuster.
5. Determine roll center spacer count based on ride height; install spacers above the bearing only if lowered.
6. Install the arm at the subframe end first, then engage the ball joint stud into the knuckle.
7. Apply thread lubricant to the cap screw; torque the knuckle cap screw to 110 ft-lb.
8. Torque the subframe bolt to 74 ft-lb (100 Nm).
9. Tighten the Double Adjuster clamp screws to 150 in-lb maximum.
10. Sweep the suspension through full travel to confirm no binding or sway bar contact.
11. Reinstall wheels, lower the vehicle, and perform a professional four-wheel alignment.
12. Re-check all fastener torques after the first 100 miles and 500 miles.

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.