OK guys thats enough help I think. Some you gave decent help others still should learn to read the first post. I dont care about the sound it makes, the purchaser of my vehicle does, I am purely just doing his dirty work and finding answers to his questions. For the people who have a problem with ricers... Im sorry you also read the first post wrong, it not me who Im buying it for. The guy who is buying the vehicle and myself fully understand (the extent we need to) the technical side of a BOV, that is why the guy wishes to purchase it, his only concern (which wasnt a too bigger deal to him) was the sound it will produce.
Oh and on another note - C'mon guys, get over ricers right, Im sick of hearing about them in the GT4 forum, its just unnessecary nagging which annoys the hell out of alot of people. God, if someone is into screwing round with non-technical tuning on a vehicle.. let them be. They have just as much right at the fat-head tuners who are into serious performance tuning. They have just as much right to exist as the non-ricers, just different interests. I cant say im either really, all I care for vehicles is that they act as a form of transport and the occasional 4wd drifting... which is no good for the car I know!
Thanks for the genuine answers though!