@Sleighty: SD-414C should be the number.
@caveman: No, that's the Genius 80. It is big but you should know that my chassis is 12mm narrower. So in standard BD it should fit just fine. If you look at the GM-Racing page you'll find the car of Markus Mobers.
@Zacharopoulos: I made some chassis in different thicknesses. A 3mm chassis with a 3mm topdeck for carpet and a 2mm chassis witht the stock topdeck for asphalt.
On carpet you have the advantage, that the chassis is a lot stiffer and narrower. So the chassis rolls less and don't touches the surface as easy as with the stock one. The steering response is better and in high grip/high speed situations the car feels more stable.
With the 2mm chassis the only advantage is that you can change the stiffnes of the car by using different topdecks. Plus it is narrower.