Karbonius G8X M2 / M3 / M4 Carbon Front Strut Brace

Select Finish
Select Weave
Select Front Mount Finish
$1,809.00
$1,809.00
Shipping calculated at checkout.
  • Fully secure checkout
  • Free shipping over $200
  • Fitment help from real people

Question about this product?

We're happy to help.

The Karbonius G8X M2 / M3 / M4 Carbon Front Strut Brace addresses a well-known shortcoming of the G8X M platform: while the F8X M3 and M4 came equipped with a striking and structurally impressive factory carbon fiber strut brace, BMW chose a stamped steel two-piece design for the G8X generation. Karbonius has engineered a complete replacement — a fully autoclave-cured, 100% prepreg carbon fiber one-piece V-brace that eliminates the weak-point joints of multi-piece designs and reduces weight by over 5.5 lbs compared to the factory unit.

Unlike most aftermarket G8X strut braces that rely on multi-piece jointed designs or off-the-shelf carbon tubes inserted into chassis mounts, the Karbonius V-brace is a true monobloc tubular construction. The integrated CNC-machined 6061 aluminum mount provides superior wear resistance and strength at the chassis mounting interface, and is available anodized in natural silver or black. Installation uses factory hardware throughout — no modifications required.

At just 2.2 lbs against the OEM unit's 7.7 lbs, the Karbonius strut brace improves front chassis rigidity while reducing weight and delivering an engine bay appearance that finally matches the standard set by the factory F8X carbon brace it was inspired by.

What's Included

  • One-piece carbon fiber V-brace with integrated 6061 aluminum mounting hardware
  • Numbered certificate of authenticity

Product Details

  • Ultra-lightweight: 2.2 lbs vs. 7.7 lbs for the OEM steel strut brace
  • One-piece monobloc V-brace construction — no weak-point joints
  • 100% prepreg carbon fiber construction
  • Autoclave-cured for strength and finish quality
  • CNC-machined 6061 aluminum mount integrated into the bar for superior durability
  • Available aluminum mount finish: Anodized Silver or Anodized Black
  • Installs with factory hardware — no modifications required
  • Individually numbered for authenticity
Karbonius G8X M2 / M3 / M4 Carbon Front Strut Brace

$1,809.00

Does it come with a warranty?

Parts are covered by the manufacturer's warranty where one is offered. If something goes wrong, contact us and we'll help you with the claim.

What happens if I don't like it?

New, uninstalled parts in their original packaging can be returned within 30 days of delivery. Suspension components (coilovers, springs and dampers), wheel spacers and batteries can't be returned, and a restocking fee applies to approved returns. See our refund policy for details.

How fast is shipping?

In-stock orders usually ship within 1–3 business days. Many parts ship directly from the manufacturer or distributor. Orders over $200 ship free with standard shipping, and faster UPS and USPS options are available at checkout. See our shipping policy.

What's the returns policy?

You have 30 days after receiving your item to request a return. Parts must be new, uninstalled and in their original packaging. Contact us first to start a return. Full details are in our refund policy.

Questions about this product?
Don't be a stranger.

Get in touch