Well...there's the hks ssqv, forge, gfb hybrid, grb stealth, txs rfl <--(stands for real f'n loud) lol j/k I really don't know what it stands for. Back on topic, it all depends on what kind of sound you like really.

For some of the bov sounds click here

 

i got a Forge BOV that i will sell you for $100. Its has an awesome sound of just air getting dumped out, no whitsles or bells just a rush of air. I loved the sound.

 

i really liked the hks bov that used to have....not too loud like the rfl but loud enough to be noticed.

chris

 

I have a Turbo XS type H BOV....it too is a "WHOOSH" instead of a whistle sound....I like it, but I wanna get the RFL....so if you want, I am willing to sell that one. I will get rid of it for $95-100, its practically new....I still have the orig. box for it too....its in good shape....if you go to UCKK tonight, just ask me (silver Sedan)....I will let you check it out....we can go for a ride too, if you wanna hear it in action.

-Ted