BOV questions

I had a few questions on my HKS bov. I really dont like the sound of it at all and i hurd you can change that by the bolt on the back of the bov. If thats correct how would i go by that without messing up the car. As of right now my car is where i want it and driving fine and i would hate to mess with that and mess it all up because i hurd messing with that can cause stalling out or something. I'm not sure if thats true or not ether but i figured i would ask first. Thanks

You can change the sound by buying different inserts for it.