before i bought my car from brandon he told me he went through 2 hks ssq bov's because they both just crapped out on him...he then went with a greddy typs s before he sold it to me...i didnt care to much for the ricey type s sound so i traded for the new type rs greddy...has the best design according to greddy then all of their bov's....although some here would argue the type r is the best for holding higher boost pressures...but since ur in on it for the sound...my type rs sounds like air brakes off of school bus