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Karbonius carbon strut brace for E46 M3 and 3-Series suspension, made of lightweight carbon fiber with mounting hardware visible
  • Karbonius carbon strut brace for E46 M3 and 3-Series suspension, made of lightweight carbon fiber with mounting hardware visible
  • Karbonius E46 M3 carbon strut brace for suspension, highlighting lightweight and durable carbon fiber construction for improved chassis stability.
  • Karbonius E46 M3 carbon strut brace for suspension, showing black carbon fiber construction and mounting points.
  • Karbonius E46 M3 carbon suspension strut brace installed in a 3-Series car, enhancing chassis rigidity and handling.
  • Karbonius E46 M3 3-Series carbon strut brace for suspension, showing the lightweight carbon fiber construction and mounting points.
  • Karbonius E46 M3 carbon strut brace for suspension, showing the sleek black carbon fiber design mounted in a car engine bay.
  • Karbonius E46 M3 3-Series carbon strut brace for suspension, shown installed with black carbon fiber and metal brackets.
  • Karbonius E46 M3 / 3-Series carbon suspension strut brace installed in engine bay, enhancing chassis stiffness and performance.
  • Karbonius E46 M3 carbon strut brace for 3-Series suspension, shown mounted on vehicle engine bay with matte black finish
  • Karbonius E46 M3 and 3-Series carbon strut brace for improved suspension stability and performance in a close-up view
Karbonius E46 M3 / 3-Series Carbon Strut Brace

Karbonius E46 M3 / 3-Series Carbon Strut Brace

AVAILABLE TO ORDER

SKU: E46SB01-CF-2-AS
$1,195.00

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The Karbonius E46 M3 / 3-Series Carbon Strut Brace is one of the most effective handling upgrades available for the E46 platform — directly inspired by the discontinued BMW Performance strut bar, but re-engineered in premium prepreg carbon fiber. A strut tower brace adds meaningful structural strength to the chassis, preventing strut tower flex and maintaining suspension geometry under hard cornering, both on road and track.

At just 1,100 grams, the Karbonius brace is exceptionally lightweight without compromising the structural integrity required of a functional chassis component. The carbon bar is manufactured in prepreg carbon fiber and cured in an aluminum mold in an autoclave; the strut tower caps are 5-axis CNC machined from natural anodized aluminum and include six titanium strut tower nuts. The 2×2 carbon weave in standard high-gloss finish provides a striking, eye-catching appearance that complements any E46 engine bay.

Each piece is individually numbered to guarantee authenticity and origin.

What's Included

  • Carbon fiber strut brace with integrated aluminum mounting hardware
  • 6 titanium strut tower nuts
  • Numbered certificate of authenticity

Product Details

  • Weight: 1,100 g
  • 2×2 twill weave prepreg carbon fiber construction
    • 1x1 plain weave available by custom request
  • Cured in aluminum mold and autoclave
  • Natural anodized aluminum strut tower caps, 5-axis CNC machined
  • 6 titanium strut tower nuts included
  • Controlled break zone for safety
  • Individually numbered for authenticity
  • 2-Year manufacturer warranty

Vehicle Applications

Installation Note

Installation instructions, including terminal relocation guidance, are available via the official Karbonius document: E46 Strut Brace Installation Instructions (PDF).

Recommended Upgrades

Notes

  • Designed and manufactured in Spain by Karbonius Composites under ISO 9001 standards
  • Professional installation recommended

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