Hey man, just wondering...I see you installed to NST pulley kit on your Z. I used to have an Agency Power pulley kit on my Scion and I was very satistfied. It freed up a good 7-10 horses. A few questions if you don't mind...have you had any problems what so ever since the install? Did you have to buy a different size pulley since the pulleys are 10% overdrive? Lastly, how much was the total install cost for the kit? I just recently got a Z and I'm looking for small inexpensive mods for the time being.Thanks.