Originally Posted by Bimmer-Bob
You worried about an aftermarket CF roof screwing up your chassis rigidity? I'd be concerned about that.
No. The sedan chassis is actually more ridged than the coupe from what I've read (race teams running sedans vs. coupes).
There are still steel braces running across the roof regardless of the roof.
2015 GTI S, 6M, LP, Volk TE37SL 17x8.5, Michelin PSS 245/40, HPA SHS Coil-Overs, Peloquin LSD, Sachs SRE, Eurocode F/R Sway Bars, SuperPro Control Arms, Remus Catback, APR Stage 1 Tune, APR CAI, Aero Force Gauge Pod, APR Boost Gauge, Kersher Front Lip, Short Shifter, Tyrolsport Deadset, Stoptech BBK, HPA Dogbone
2008 BMW Z4 3.0si Coupe - because racecar