Im a new scooby driver with a 94wrx. I have a ****ty 5ziger bb which has no noticable rumble at all when idleing!!! I wanted a scooby for the distinctive lumpy growl!! I have still got the cat fitted so will removal of this make my 5ziger deeper or do I change the lot? Finally change it for wot? scoobysport, scoobymania, blitz? please help!!! dont wanna break the bank but need something to get it sounding mean!!