Put the silencer on your exhaust. Makes your car sound as loud as a Civic

 

Odds are, you have two infractions: CVC27156(b) (emissions) and CV27151 (exhaust-mods/loudness). You will soon get a letter with the bail amount. You will almost definitely end up going to court, regardless of whether you fix it (in advance). Having it completely fixed and signed off on before going to court will help.

There is a ton of info on this on the web (because this pair of tickets is given out quite often), but read as many things as possible, so you can weed out the nonsense.