MMR Underbody Chassis Brace Kit (Set of 3) for Mini F56 Hatch, F55 5-Door & F54 Clubman (Cooper, Cooper S, JCW, 2013+) Front, Centre Tunnel & Rear T-6061 Billet Aluminium, Gloss Black, Bolt-On

MMR Three-Piece Lower Bracing Set for Mini F56, F55 and F54

Give your Mini a tighter, more planted feel with this precision-machined aluminium brace bundle. This 3-piece pack replaces the stock steel bars beneath the car with lightweight billet sections that increase rigidity, tidy up the underside and create valuable room for larger bore exhaust systems. Ideal for fast-road driving and track days on Cooper, Cooper S, Cooper SD and JCW models from 2013 onwards.

Why this upgrade makes a difference

• Improves body stiffness for crisper turn-in, better mid-corner stability and more confidence at speed
• Extra space around the centre tunnel for cat-back and performance systems with bigger diameter pipework
• Billet T-6061 aluminium construction for strength with reduced weight compared to the factory steel parts
• Black anodised finish that looks OEM Plus and resists corrosion
• Bolt-in install using existing mounting points - no cutting and fully reversible
• No added noise, vibration or harshness - just a more precise drive

Each piece is CNC profiled to keep material where it matters and trim mass where it does not. The mid tunnel bar maintains crucial shell stiffness while giving the clearance enthusiasts need when fitting a larger exhaust.

What is included

• Front lower brace bar
• Centre tunnel reinforcement
• Rear cross brace
• Fitting hardware
• Gloss black anodised finish

Compatibility

Fits Mini models from 2013 onwards:

• F56 3-door hatch - Cooper, Cooper S, Cooper SD, JCW
• F55 5-door hatch - Cooper, Cooper S, Cooper SD, JCW
• F54 Clubman - Cooper, Cooper S, Cooper SD, JCW

Suitable for manual or automatic, petrol or diesel variants.

Proven on our own cars

We run this MMR bracing on our demo Mini and the difference is instant. Steering feels more direct, the front end bites harder and the car tracks flatter across B-roads. Customers consistently report a more connected drive without compromise to comfort.

Installation and support

Direct bolt-in with basic tools. For professional fitting, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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Order today for sharper handling, improved exhaust clearance and a cleaner undercar finish on your Mini.