SPL Parts Front Lower Control Arms

2020–2023 Toyota GR Supra & 2019+ BMW Z4

SPL FLCA G29

Overview:

The SPL Parts Front Lower Control Arms (FLCA) are precision-engineered suspension components designed specifically for the 2020 to 2023 Toyota GR Supra and the 2019 and newer BMW Z4. These control arms provide critical adjustments for roll center, camber, and track width, allowing enthusiasts and professional tuners to optimize handling and alignment settings with ease. By replacing the OEM arms, SPL Parts FLCA eliminate flex and binding, delivering improved suspension articulation and enhanced vehicle dynamics for spirited driving and track use.

Ideal for drivers seeking precise suspension tuning and increased durability, these control arms enable full articulation through correct ball joint angles and feature a unique Double Adjuster system that simplifies alignment adjustments without the hassle of jam nuts.

Key Features:

Engineered for performance and adjustability, the SPL Parts Front Lower Control Arms offer:

• Roll center, camber, and track width adjustment for tailored suspension geometry
• Exclusive Double Adjuster design with rotating clamps for easy, jam nut-free locking of alignment settings
• Slotted main arm to accommodate pinch bolts for secure mounting
• Use of FK Rod Ends and high misalignment spherical bearings to eliminate flex and binding while allowing smooth articulation
• Electroless nickel plated 4130 Chromoly Double Adjuster for corrosion resistance and strength
• Lightweight 6061-T6 billet aluminum arms combined with blue anodized titanium hardware to reduce unsprung weight
• Stainless steel roll center spacers included to correct suspension geometry on lowered vehicles
• Precision machined components made in the USA for quality and reliability

Construction & Design:

The SPL Parts Front Lower Control Arms are crafted from premium materials to ensure strength, durability, and weight savings. The main arms are machined from 6061-T6 billet aluminum, providing a lightweight yet robust foundation. The Double Adjuster is constructed from 4130 Chromoly steel, gun drilled to reduce weight and electroless nickel plated to resist corrosion and wear.

Blue anodized titanium hardware further reduces unsprung mass without compromising strength, enhancing suspension responsiveness. The integration of FK Rod Ends and Teflon-lined spherical bearings ensures low friction and high misalignment tolerance, allowing the suspension to articulate smoothly under dynamic conditions.

Installation & Fitment:

Designed as a direct replacement for the factory front lower control arms on the 2020–2023 Toyota GR Supra and 2019+ BMW Z4, these SPL Parts FLCA install with minimal modifications. The included stainless steel roll center spacers allow for precise suspension geometry correction, especially on vehicles with lowered ride heights. Installation requires standard suspension tools and alignment after fitting to ensure optimal performance and tire wear.

What's Included:

• Pair of SPL Parts Front Lower Control Arms
• Electroless nickel plated 4130 Chromoly Double Adjusters with rotating clamps
• Blue anodized titanium hardware
• FK Rod Ends with Teflon-lined spherical bearings
• Multiple stainless steel roll center spacers for suspension geometry adjustment
• Installation instructions

Ideal For:

These front lower control arms are perfect for Toyota GR Supra and BMW Z4 owners who demand precise suspension tuning for track days, autocross, or aggressive street driving. They are especially beneficial for those who have modified their suspension or lowered their vehicle and require accurate roll center and camber adjustments to maintain optimal handling and tire contact.

SPL Parts is a manufacturer specializing in high-performance suspension components, including control arms, toe links, and sway bar endlinks, primarily for vehicles like Nissan 350Z/370Z, GTR, BMW M-Series, Toyota Supra, and Subaru platforms. Their products are designed to enhance handling and stability for both street and track applications, offering adjustability and durability to meet the demands of performance enthusiasts.