Took mine out for a drive.. definetly more torque, gave the car a deeper growl and had more air flow. I do recommed the Psk for anyone with this pulley, even with a brand new belt i heard some belt slip when letting off the throttle. I will have the psk installed this week and hit the track with some 100 octane fuel this saturday.
One question I do have, im running a needwings single cai do you experts think thats sucking enough air or should i upgrade to a dual?