Oh god, I had to register just to answer this one. Mate, a real car has an engine in it that produces thousands of little explosions that make the noise we all love to hear. A Bit Char-G / whatever has motor that whines. You aren’t gonna get that noise … sorry!!
put a v-8 in it with a borla cat back system. or run behind it and scream rrrrrrrrrrrrrrrrrrrrrrrrrrrr rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrcat back souds like crap anywhays equal headers with st8 3 1/2″ in pipes sounds way better. and cat backs dont have the flow needed for turboed cars justa lil info.