What can i do to keep my car loud and keep it from sounding like a fart can

right now i have ssac headers no cat or res to some magnaflows and when i rev it at a stop it sounds like a tuner unless i bring the revvs up slow, and while moving half to 3/4 throttle will sounds perfect but once it starts to get a good load and revvs it sounds like a god damn fart cannon again. Any ideas?