incorrect... any BOV will make that noise... you dont have to have a rediculous amount of mods... a bov just lets out air pressure when shifting... so when you get higher into the gear and air builds up then you shift it will still make that same PSHHH sound... no rediculous mods needed i promise... plus HKS have a more distinct sound and personally i think it sounds better. So if your going to get anything get the HKS... and no, you dont need crazy mods for the pssh... bovs are one of the most basic things you can get for the tt... plus remember he has a single turbo so only 1 bov... you have two... so you have two bovs.... sounds waaay hotter ;)