Got the recirc fitting and got the rs on tonight. Damn this thing is quiet. Under normal driving you won't hear it. Seems loudest 5-10psi... over that and the sound kind of gets lost in the intake and exhaust sounds. Sounds a lot like my turbo xs hyrbid but gonna sit on it a few days. Really would prefer a WHOOSH instead of a PSSST, but I guess I can't get that recirc. I'll post up again later