here are my questions:

1) what is the stock exhaust piping diameters on a 2000 EX?

2) what is the diameter of the stock steering wheel? cuz i'm thinking about replacing it with sparco.

3) how to remove the stock steering wheel with the srs in tack?

4) are the aftermarket steering wheel illegal if pulled over by five-0? i live in cali... so if someone has some answers that would be great.