Active Autowerke Chassis Brace for BMW F87 M2 Competition, F80 M3, F82/F83 M4 (2014-2020) – Underbody X Brace/Subframe Reinforcement, 6061 Aluminium, Direct OEM Replacement

Active Autowerke Underbody Rigidity Brace - BMW F87 M2 Competition, F80 M3, F82 F83 M4

Unlock sharper response and rock-solid stability with the Active Autowerke underfloor rigidity brace for the BMW F8X platform. This lower crossmember upgrade replaces the factory piece with a stronger, lightweight 6061 aluminium assembly that tightens up the front end, improves turn-in and delivers a more planted feel on fast road and track day driving.

Expect a noticeable reduction in flex, crisper steering feedback and more confidence mid-corner. We have fitted and used this part ourselves on F8X cars and our customers consistently report a more connected drive without unnecessary compromise. It is a bolt-on swap that utilises the original mounting points for a clean, hassle-free install.

Why this lower brace belongs on your F8X

• Strengthens the front substructure for enhanced torsional stiffness and precision
• 6061 aluminium construction for an excellent strength-to-weight balance
• OEM swap using factory fixings for quick, straightforward installation
• Ideal for fast road and track day setups where consistency and feedback matter
• Designed to clear performance exhaust upgrades, including Active Autowerke midpipes on F87 and F80 F82 platforms

Feel the difference

The F87 M2 Competition, F80 M3 and F82 F83 M4 respond brilliantly to a quality lower brace. With this reinforcement fitted you get more immediate steering, better mid-corner stability and a tighter, more composed chassis over bumpy B-roads and through long sweepers. It is the perfect complement to uprated suspension, tyres and alignment.

Vehicle fitment

• BMW F87 M2 Competition 2018+
• BMW F80 M3 Saloon 2014 - 2020
• BMW F82 M4 Coupe 2014 - 2020
• BMW F83 M4 Convertible 2014 - 2020

Part number

AA-EXHF8XM-BRACE

Installation

Straightforward bolt-on fit using the original hardware and factory locations. For professional fitting in the UK, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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Add to basket now for a sharper, more confidence-inspiring BMW M2 Competition, M3 or M4. Drive with greater precision and enjoy the feel of a truly connected front end.