I have an ATI P1-SC and it screams like no other but it could be several different brands depending on how the drive gears inside have been machined. I have found that the roots blower do not make as much noise but do sound very nice. I do know one thing it will grab peoples attention.
bone stock 1994 cobra with a P1-SC, 7lbs boost, 352 RWHP dyno proven!!!