i would never drive w/o the bov or some type of re-circ. flutter is a sound heard with a bov, and is the air coming back on itself and slowing the turbo down and putting force on the shaft in reverse.
24psi? no recirc, pop off, or bov? good luck on that lasting.
HKS SSQV. is what ill be going with, Ill have a ford motor, but gotta keep the rice in me..
and if you arnt making the pipes your self, plastic is a great Idea.. make the pipes, and take them to a shop.. say "make these".