SPL Parts Eccentric Lockout Kit (REAR)

2020–2023 Toyota GR Supra & 2019+ BMW Z4 G29

SPL EL G29

Overview:

The SPL Parts Eccentric Lockout Kit is a precision-engineered solution designed to eliminate the common issue of rear alignment slippage in the Toyota GR Supra (2020–2023) and BMW Z4 G29 (2019+). Stock eccentric bolts supplied by BMW and Toyota allow for small toe and camber adjustments but tend to slip under high cornering loads, causing unwanted changes to rear alignment settings. This kit replaces the stock eccentric bolts with robust lockout plates that maintain your alignment settings securely, ensuring consistent handling and performance on the road or track.

Ideal for enthusiasts and racers who demand precise and reliable rear suspension geometry, the SPL Parts Eccentric Lockout Kit ensures your suspension adjustments remain exactly where you set them, even under aggressive driving conditions. Note that adjustable control arms are required to make toe adjustments after installing this kit, as the stock eccentric bolts are removed.

Key Features:

Engineered to provide zero-slip rear alignment retention, this kit offers the following benefits:

• Eliminates stock eccentric bolts prone to slipping under high cornering forces
• Maintains precise rear toe and camber settings for consistent handling
• CNC machined from high-strength 6061-T6 aluminum for durability and lightweight performance
• Includes zinc-plated grade 10.9 bolts and lock nuts for maximum clamping force and corrosion resistance
• Complete kit includes washers and hardware for both camber and toe arms
• Compatible with adjustable control arms to allow fine-tuning of rear alignment
• Designed specifically for Toyota GR Supra A90 (2020–2023) and BMW Z4 G29 (2019+), as well as BMW G20, G21, G22, G23, G24 (2018+) and G42 (2021+)
• Manufactured, engineered, and assembled in the USA to ensure quality and precision

Construction & Design:

The lockout plates are CNC machined from premium 6061-T6 aluminum, a material known for its excellent strength-to-weight ratio and resistance to fatigue. This ensures the components withstand the rigors of high-performance driving without adding unnecessary weight. The hardware included—grade 10.9 bolts and lock nuts—are zinc plated to resist corrosion and provide superior clamping force, eliminating any chance of slippage. The design focuses on durability and precision fitment, perfectly matching the factory suspension geometry for seamless installation and reliable performance.

Installation & Fitment:

Installation of the SPL Parts Eccentric Lockout Kit requires removal of the factory eccentric bolts on the rear toe and camber arms. Because the kit locks the alignment settings in place, adjustable control arms are necessary to make any future toe adjustments. The kit is designed as a direct fit for the rear suspension of the Toyota GR Supra (2020–2023) and BMW Z4 G29 (2019+), as well as compatible BMW G20, G21, G22, G23, G24 (2018+) and G42 (2021+) chassis. Installation should be performed by a qualified technician to ensure proper torque specifications and alignment settings are maintained.

What's Included:

• CNC machined 6061-T6 aluminum lockout plates for camber and toe arms
• Zinc plated grade 10.9 bolts and lock nuts
• Washers for proper fitment and load distribution
• Complete hardware kit for one vehicle’s rear suspension

Ideal For:

This kit is perfect for performance enthusiasts, track day drivers, and anyone seeking consistent and reliable rear suspension alignment on their Toyota GR Supra or BMW Z4. It is especially beneficial for those who push their vehicles hard in corners and require their suspension settings to remain stable under extreme loads. If you have adjustable rear control arms and want to eliminate the risk of alignment slippage, the SPL Parts Eccentric Lockout Kit is an essential upgrade.

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.