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MMR Performance

MMR Centre Tunnel Underbody Chassis Brace for MINI F56 F55 F54 (2013+) Billet Aluminium, Gloss Black Fits Cooper, Cooper S, JCW

MMR Centre Tunnel Underbody Chassis Brace for MINI F56 F55 F54 (2013+) Billet Aluminium, Gloss Black Fits Cooper, Cooper S, JCW

£163.79
£163.79
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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

Mid-Tunnel Reinforcement Bar for MINI F56 F55 F54

Give your MINI a tighter, more connected feel with this CNC machined mid-floor stiffener. Produced from 6061-T6 billet aluminium and finished in a deep gloss black anodise, it replaces the thin pressed steel factory piece with a stronger, lighter component that looks as good as it performs. Ideal for spirited road use and track days, it adds strength to the centre of the car while creating valuable room for larger exhaust systems.

What you will notice

  • Crisper steering response and a more planted front end
  • Improved mid-corner stability and confidence on bumpy roads
  • Extra space around the centre tunnel for big bore exhausts and performance silencers
  • No increase in noise, vibration or harshness inside the cabin

Why this upgrade works

  • Solid 6061-T6 billet alloy construction for excellent rigidity with low weight
  • Gloss black anodised finish for corrosion resistance and a premium OEM-plus look
  • Direct swap using the original bolt locations, no drilling or trimming required
  • Supplied with new mounting hardware for fuss-free installation
  • Fully reversible fitment if you ever want to return to stock

We have fitted and run this reinforcement on our own cars and many customer MINIs. Feedback is consistently positive, with owners reporting sharper turn in, better chassis composure and a more precise feel without sacrificing comfort.

Compatibility

  • MINI F56 Hatch, F55 5-door, F54 Clubman
  • 2013 onwards
  • Cooper, Cooper S, Cooper SD, John Cooper Works
  • All engine codes

Installation and fitting

Bolts up to factory points with hand tools. No cutting, no drilling, fully reversible.

Prefer professional fitting We can help. MJ Modifications in Warwickshire offer in-house installation. Request a quote via info@mjmodifications.co.uk.

In the box

  • Centre tunnel stiffener in gloss black anodised billet aluminium
  • New fixings

Complete the setup with matching front and rear floor bracing, available separately.

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