SPL Parts FLCA G29 Front Lower Control Arms for 2020-2026 Toyota GR Supra/BMW Z4

Vehicle Fitment

• 2020-2026 Toyota GR Supra (A90, All Trims: Base, Premium, Launch Edition, A91 Edition, RWD, 2.0L Turbo L4 / 3.0L Turbo I6)
• 2019-2025 BMW Z4 sDrive30i (G29, RWD, 2.0L Turbo B48 I4)
• 2020-2021 BMW Z4 sDrive M40i (G29, RWD, 3.0L Turbo B58 I6)
• 2022-2025 BMW Z4 M40i (G29, RWD, 3.0L Turbo B58 I6)
• 2020 BMW Z4 M40i First Edition (G29, RWD, 3.0L Turbo B58 I6)

Fitment Notes

• IMPORTANT: On 2020 Toyota GR Supra and 2019 BMW Z4, the factory swaybar runs very close to the lower control arm - this arm does not change that clearance. If running aftermarket swaybars or caster adjustment hardware, verify swaybar-to-arm clearance before driving; contact between the SPL FLCA and swaybar can damage the arm and induce abnormal bearing loads
• If swaybar clearance is an issue, SPL offers the Caster Adjustable Tension Rod Bushing (CRB G29) and Adjustable Front Endlinks (FE G29) as supplementary solutions to restore adequate clearance
• Sold as a pair (Left and Right) - covers both front lower control arm positions
• Replacement FK rod ends are available separately from SPL Parts when worn
• This is a track and performance-oriented arm; the elimination of rubber bushings will increase NVH (road noise, vibration) on street-driven vehicles - expected and normal with spherical bearing construction

Features

• SPL Parts' exclusive Double Adjuster design - machined from gun-drilled 4130 Chromoly steel, electroless nickel plated for corrosion resistance - provides simultaneous camber and track width adjustment via rotating clamps, eliminating the need for jam nuts entirely
• Roll center, camber, and track width adjustment in a single arm - multiple Stainless Steel roll center correction spacers are included to restore proper geometry on lowered vehicles
• Correct ball joint angle engineered into the arm design ensures full suspension articulation without binding throughout the suspension travel range
• Main arm body is slotted to accept pinch bolts for secure, repeatable lock-down of alignment settings without the risk of slippage under load
• FK Rod Ends and High Misalignment Spherical Bearings eliminate all bushing flex and bind found in OEM rubber control arms, providing immediate, precise suspension response and improved cornering feedback
• 6061-T6 billet aluminum arm construction minimizes unsprung weight while maintaining the structural rigidity required for high-load track and performance driving
• Blue anodized titanium hardware further reduces unsprung weight over standard steel fasteners without compromising clamping strength
• Teflon-lined, three-piece FK spherical bearings provide low-friction articulation for smooth suspension movement while resisting contamination and wear over extended track use
• Designed, engineered, and manufactured in the USA by SPL Parts - an industry-recognized leader in high-performance adjustable suspension components

Specifications

• Part Number: SPL FLCA G29
• Position: Front Lower Control Arm (Left and Right)
• Adjustability: Camber, Track Width, Roll Center, Caster (indirect via length)
• Main Arm Material: 6061-T6 Billet Aluminum
• Double Adjuster Material: 4130 Chromoly Steel, Gun-Drilled, Electroless Nickel Plated
• Hardware: Blue Anodized Titanium
• Rod Ends / Bearings: FK Rod Ends with High Misalignment Teflon-Lined 3-Piece Spherical Bearings
• Roll Center Spacers: Stainless Steel (multiple sizes included)
• Adjustment Locking: Rotating Clamp with Pinch Bolt Slot (no jam nuts)
• Drivetrain Compatibility: RWD
• Quantity: Sold as a pair (Left and Right)

Included Components

• 2x SPL FLCA G29 Front Lower Control Arms (Left and Right)
• 2x FK Rod Ends with High Misalignment Spherical Bearings (pre-installed)
• 1x Set of Stainless Steel Roll Center Correction Spacers (multiple sizes)
• 1x Complete Hardware Kit (Blue Anodized Titanium fasteners)

Product Description

The SPL Parts FLCA G29 is a pair of fully adjustable front lower control arms engineered specifically for the 2020-2026 Toyota GR Supra (A90) and 2019-2025 BMW Z4 (G29) - two vehicles that share a common platform and front suspension architecture. The factory lower control arms on these platforms use rubber bushings and offer no meaningful alignment adjustability beyond what the OEM eccentric bolts provide. The SPL FLCA G29 replaces them entirely with billet 6061-T6 aluminum arms that provide simultaneous adjustment of camber, track width, and roll center through SPL's exclusive Double Adjuster system - machined from gun-drilled 4130 Chromoly and secured via rotating clamps with pinch bolts rather than jam nuts. This means alignment settings lock down quickly, repeatably, and without the multi-wrench fumbling that conventional jam-nut designs require.

Roll center correction is built into the design from the ground up. Multiple stainless steel spacers are included to raise or lower the roll center to suit the vehicle's ride height, correcting the geometry degradation that occurs when these platforms are lowered on coilovers or springs. FK Rod Ends and high-misalignment, Teflon-lined three-piece spherical bearings replace all OEM rubber compliance, delivering immediate and direct suspension response with zero bushing deflection under cornering, braking, or acceleration loads. The correct ball joint angle is engineered into the arm to ensure full articulation throughout the suspension's travel range without binding - a critical detail on this platform where geometry changes significantly with ride height adjustment.

Buyers should be aware of one platform-specific clearance consideration: on 2020 Supra and 2019 Z4 models, the factory swaybar runs in close proximity to the lower control arm, and the SPL arm does not alter this geometry. Owners running aftermarket swaybars or caster adjustment hardware must verify adequate clearance before driving, as contact between the arm and swaybar can cause arm damage and impose abnormal loads on the bearings. SPL's complementary CRB G29 (Caster Adjustable Tension Rod Bushing) and FE G29 (Adjustable Front Endlinks) are available to address this clearance issue when needed. The FLCA G29 is designed and manufactured in the USA by SPL Parts and is the definitive front lower control arm solution for GR Supra and Z4 G29 track, time attack, drift, and performance street builds.