without knowing anything about his car, how can you suggest a clutch too him? I ran faster than anyone in this thread on a 2100.

What if he has 500hp, a 2600 wouldn;t cut it then.

I say if you are mostly stock to about 300hp a 2100 would be just fine. from 300 to 450hp a 2600 would be good. More power than that and you will have to decide how to handle it. A 2600 or 2900lb PP with a copper ceramic puck disk is an option or a twin disk setup.