I'm gonna go on record and say there will NOT be an S55 in an M2 period. If that's why you are here you should be in a motor swap thread, and not a CSL thread.
It will cost way to much to federalize if they drop a completely different motor in it.
CSL means - coupe sport lightweight -
Just like any previous CSL OR GTS I would anticipate an M2 CSL or GTS /CS to have either
- a hand picked motor
- meth injection and better tune
- perhaps a slight increase in displacement
E30 M3 Sport Evo was bored from 2.3 to 2.5
E36 m3 CSL was hand picked motors
e46 M3 CSL - hand picked motor + airbox + Alpha N
e90 M3 GTS - bored from 4.0- 4-4l
m4 GTS. - meth injection plus tune
Drop in an entirely all new motor? Not gonna happen. Move along ... That's not the CSL you are looking for ...
