ANY STREET LEGAL exhaust systems ??? for California

Just get whatever you like and don't ride like a douche. You'll be fine.
Almost all bikes I see in CA have aftermarket exhaust, the cops don't even care. If you get caught on some other bs, speeding/wreckless/etc., then yeah they'll probably cite you for exhaust just because they already have you pulled over.

yea thats what i see, everyone have some custom ones, thanks for the advice , then im going to get my custome stuff. just wanted to be sure before doing something.