I know what they do, what will work, etc... i just wanted opinions on the sound, functionality of the different bov's made for our car. Ive only heard the HKS, and to be honest I loved it, so thats what I bought for my car. But what does the Blitz or the Apexi or the RFL or the Greddy or the Turbonetics sound/work like. just wanted to see if anyone out there had these setups and could compare!!