Karbonius Carbon Rear Seat Delete Kit for G82 M4 & M4 CSL – Lightweight Closeout System
Chris McGuire August 04, 2025
In a world where aftermarket parts often prioritize speed over quality, Karbonius reminds us what true craftsmanship looks like. Their carbon rear seat delete closeout kit for the G82 M4 and M4 CSL is a showcase of engineering precision and OEM-level refinement. This isn’t a rushed product—it’s the result of over a year of development, CAD modeling, 3D scanning, and hands-on prototyping. What makes this kit unique is its dual fitment designed not just for the standard M4 Coupe, but also for the ultra-rare M4 CSL.
Since the CSL came with a factory rear closeout in place of traditional seats, Karbonius had to build independent tooling for both models. This attention to detail is what sets the brand apart and aligns perfectly with IND’s founding mission: delivering rare, high-quality components from around the world. Each kit is constructed from 100% pre-preg carbon fiber and offers an OEM+ fit. The panels click into place using factory mounting points, requiring no major modifications and making the kit fully reversible. For those looking to take it a step further, Karbonius offers customization options including:
- Gloss or matte finish
- Track-style helmet mesh netting
- Custom-painted ///M logo, hand-finished in Spain
We just received one of the first production units from Karbonius, and the quality exceeded our expectations—from the symmetrical V-weave carbon to the robust OEM-style clips. You’ll see the debut of this closeout kit in our British Racing Green G82 M4 project at MPACT Festival this August in Long Pond, PA.
Product Highlights:
- Full 4-piece kit: Includes left panel, right panel, lower closeout, and top section
- True weight savings: Lightweight carbon construction improves power-to-weight ratio
- Finish options: Gloss or matte with precise V-pattern carbon weave
- 100% carbon fiber: Built from 2x2 3K pre-preg weave for strength and durability
- No paint required: UV-protective clear coat for lasting clarity
- OEM install points: Simple, clean install using factory hardware
- Fully reversible: Can be removed with no damage to the vehicle
- Track-ready functionality: Optional helmet net and fire extinguisher provisions
- Visual upgrade: Race-inspired interior feel without compromising luxury
- Extra cargo room: Gain useful rear storage for track essentials or gear
