What induction kit do you have on at the mo? My dump sound (forge 007) was quiet as when i had my Ram Air induction kit on, as soon as i put the Jetex open cone filter on, its now quite loud. Id never want it scooby loud as that just sounds chavy, but you can def hear the dump from outside th car.
Also if you havent got a Forge TIP get one! You'll get a nice spool up sound and a slightly better dump