VG30's. The differences were NOT between NA & TT, they were between getting the 300ZX or the Skyline one. Why would you get a pulley for a Skyline to put on a 300ZX you ask? Well the 300zx pulley is the exact same sizing as the stock one and utilizes the stock pulleys. There is no difference between the TT and the NA pulley. It is still a lightweight piece with it magnificent anti vibration technology. Now on the Skyline pulley, one can put the pulley on the 300zx block and utiliize large pulley diameters for extra HP but Fisher cannot give us timing marks due to they have no way of marking a pulley not intended for a particular application. I would recommend the intended 300ZX pulley for ease of install but you motor heads can feel free to try the Skyline one out for a few extra ponies. Please call Tim Lightfood who in handling the GB at Fisher concepts, as he has most specs and is the greatest asset in your decision in purchasing the right one.
