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Karbonius Composites Carbon Front Strut Brace for G8x BMW M2 / M3 / M4

Price range: $1,595.00 through $1,845.00

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Karbonius Composites G8X M3 / M4 one-piece V-brace by Karbonius, autoclave-cured 100% prepreg carbon with integrated 6061 mount; boosts rigidity, drops 5.5 lb vs OEM stamped steel, quick install with factory hardware

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Karbonius Composites Carbon Front Strut Brace for G8x BMW M2 / M3 / M4

Karbonius Composites notes that while the F8x M3 / M4 shipped with a striking, highly rigid carbon strut brace tying the towers to the core support, the G8X platform received a cost- and space-constrained stamped-steel 2-piece brace. To address this, Karbonius engineered a full replacement: an autoclave-cured, 100% pre-preg carbon tubular V-brace that minimizes joints and potential weak points for true structural integrity. Unlike multi-piece, jointed alternatives or assemblies using off-the-shelf carbon tubes, Karbonius one-piece V-brace is purpose-built for the G8X, increasing rigidity while removing more than 5.5lb compared to the factory unit. A CNC-machined 6061 aluminum mount is integrated into the bar for added strength and is offered anodized in natural silver or black. Installation is fast and straightforward using factory hardware, and the elevated aesthetic arguably rivals the iconic F8X carbon brace.

Features

  • 5.5lbs lighter vs OEM
  • Extremely lightweight and durable
  • Offered in Anodized Silver or Anodized Black
  • One-piece V-brace design for maximum rigidity
  • 100% prepreg carbon, autoclave-cured
  • Integrated CNC-machined 6061 aluminum mount
  • Quick install with factory hardware
  • OEM-grade fit and elevated engine-bay aesthetics

Applications

  • BMW M2: G87 (2022-present)
  • BMW M3: G80, G81 (2020-present)
  • BMW M4: G82, G83 (2020-present)

Notes

  • Installation Instructions are available here

About Karbonius Composites

Karbonius Composites prioritizes uncompromising quality. Every component is produced in Spain from 100% pre-preg carbon fiber and autoclave-cured, using meticulous hand layup by highly qualified technicians under rigorous quality controls. Confident in its manufacturing standards, Karbonius provides a 2-year warranty against manufacturing defects. With extensive composites experience and a global base of satisfied customers, the brand is committed to delivering exceptional products and customer satisfaction. Each piece is individually numbered to verify origin and authenticity.


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Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.
We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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