CSL Carbon Roof
by Karbonius Composites

En route to CSL'ification

The carbon roof swap is often the bridge too far for many in their E46 M3 builds.

I get why: this is expensive and structural.

From the myriad of CSL carbon panel roof manufacturers, I picked Karbonius for two obvious reasons: quality and credibility.


Matt / @m3_epoustouflant
The CSL'ification of The Phoenix
In this special series about the CSL carbon roof of The Phoenix, I document my unboxing impressions, required hardware, professional fitment and final aesthetics.

The CSL roof specs

Pre-Preg & Autoclave Carbon

This premium process was chosen for its high tensile strength, light weight and aesthetics.

The roof comes in at 3.3 kg and the exterior is finished in 2-component clear-coat.

1x1 Weave

Using CSL matching carbon, the roof is made from 1x1 weave.

Fits with OEM hardware

The roof panel is compatible with the peripheral hardware required to complete the install. 

Spec your CSL roof
CSL Structural Roof Panel
CSL Structural Roof Panel
CSL Structural Roof Panel
CSL Structural Roof Panel
CSL Structural Roof Panel
CSL Structural Roof Panel
CSL Structural Roof Panel


CSL Structural Roof Panel

Regular price $1,527.59 Sale price$1,389.97
  • Factory Direct Process


  • Made in Spain
  • Pre-Preg & Autoclaved carbon fiber construction
  • Weight: 3.3kg
  • 1x1 carbon weave pattern
  • Available in Gloss clear coated finish
  • Exclusive and numbered piece
  • 2 years warranty
  • Fitment guaranteed.

    Professional installation is required.

    Cutting, welding and gluing structural adhesives are needed, and a re-clear might be needed.

    Required hardware

    CSL Roof Rails
    - Driver (51137897926)
    - Passenger (51137897925)
    Roof Bow (41328242075)
    Euro headliner (51442699065)
    - The Euro spec doesn't have a bump on the roof. It looks cleaner.
    CSL roof insulation
    - Front (51488229733)
    - Rear (51488229734)

    This list may evolve from my installation notes.

    Made in Spain
    Ana: the Spanish Connection.

    Karbonius Composites is a leading manufacture of BMW M street & motorsport carbon products.

    They have been on the rise since mid 2010s and establishing themselves as a leading manufacturer in the industry.

    Quality, and most importantly customer service have set them apart.

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