My non-intercooled system with the lower boost pulley is brilliant. The torque/thrust is addicting. The whine just accentuates the exhaust note, it is far from obnoxious. People really are not used to this sound coming from a car. Lot's of head turning, not so sure I like that part but whatever. Last night I drove the white car with the intercooler home, it is a tad bit quieter, but my car has a Greddy SP axle back... Overall pleased, I can not offer anything specific but I promise, it will not be much longer...