power? Are you tracking your Z or doing a lot of auto cross? If not and you are only doing it for the look of having larger brakes to fill the gap behind your wheels there are much more cost effective options that will still provided some additional stopping power. I also want to point out the stock 370Z 14" brake rotors can double as plate weights for a golds gym they are extremely heavy adding additional rotating mass to each wheel making your z feel more sluggish off the line.