BMS Differential Support Bracket Brace for G Chassis BMW/Supra is available through Speedzone Performance. Review the fitment, included parts and installation requirements below, then choose the exact option for your vehicle.

Bolt On Improved Traction

The Problem

Hard launches, aggressive shifts, and high torque loads all expose a weakness in the factory rear differential mounting. Excessive differential movement leads to wheel hop, inconsistent launches, added stress on differential bearings, and a vague or unstable feeling from the rear of the car. Over time, that movement does more than hurt performance. It accelerates wear and compromises drivetrain reliability. Especially at higher power levels.  

The Solution - The BMS Differential Brace

The BMS Diff Brace was engineered to eliminate unwanted differential movement by rigidly tying the rear differential to the subframe. The result is a planted, confidence-inspiring rear chassis that puts power down cleanly and consistently.

This is not a generic brace. Every contour of the BMS Differential Brace was designed using high-resolution 3D laser scanning of the factory subframe and differential housing. This ensures a perfect, stress-free fit with zero guesswork. The one-piece heavy-gauge steel construction removes the flex points found in multi-piece designs, while oversized M12 hardware provides clamping force far beyond OEM and typical aftermarket solutions.

The end result is a component that feels like it belongs on the car from the factory, only stronger, tighter, and engineered for performance.

What You Will Feel

• Sharper, more controlled launches
• Dramatically reduced wheel hop
• A tighter, more stable rear chassis under acceleration
• Reduced load and shock on differential bearings

Engineering Highlights

• Designed using precision 3D laser scanning for an exact OEM-level fit
• One-piece heavy-gauge steel construction for maximum rigidity
• Skeletonized design for maximum cooling
• Oversized M12 mounting hardware eliminates common weak points
• Reduces differential movement and bearing stress
• Improves traction and launch consistency
• Easy bolt-on installation with all hardware included
• Designed and manufactured in the USA

This is not just a brace. It is a structural upgrade to the rear of your car, engineered to handle real power and real driving.

Vehicle Fitment

BMW 2 Series
• 2022+ G42 BMW M240i including xDrive 

BMW 3 Series
• 2020+ G20 G21 BMW M340i including xDrive

BMW 4 Series
• 2021+ G22 G23 G26 BMW M440i including Gran Coupe and xDrive

BMW Z4
• 2019+ G29 BMW Z4 M40i

Toyota Supra
• 2020-2026 Toyota GR Supra Mk5 B58 3.0L inline-6

NOTE: Drilling of two holes required to mount the upper bracket. 

View manufacturer installation guide

Best diff brace for the G Series BMW and Supra. Period. 

Confirm before you order

Check the listed model years, engine and chassis, and any required supporting parts. Installation instructions and manufacturer restrictions supplied above apply to the selected product.

Returns

This item is supplied through Burger Motorsports and is non-returnable. Confirm your vehicle, engine, model year and selected options before ordering. Contact Speedzone Performance if you need help checking compatibility.

Suggested supporting products

Check each product’s model year, engine, chassis and selected option before combining parts.

• BMS Billet Strut Cross Braces for G20 G21 G22 G23 G26 G42 BMW (all engines)
• BMS Billet Strut Cross Braces for 2020+ Toyota GR Supra
• BMS Drop-In Performance Air Filter for 2020-2026 Toyota Supra 2.0L & 3.0L
• BMS Billet Intake for B58 Toyota GR Supra and BMW Z4
• BMS Oil Catch Can for 2020-2026 B58 Toyota Supra GR MK5
• BMS Silicone Intake Pipe Hose Upgrade for B58 Toyota Supra Mk5
• BMW Z4 Bluetooth Flex Fuel Kit for the G29 B48/B58
• JB4 Tuner for 2020-2026 Toyota Supra Mk5