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.
In this Special Series, I document the entire CSL'ification of The Phoenix, including the CSL roof transformation.
Cheers,
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)

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.