I have a friend who is running the NST ones in his 350Z and convinced me to buy them after feeling gains throught the powerband with his butt dyno. Said it was night and day. Im just waiting for NST to get some in stock, then Ill try to get a before and after dyno.
As far as safeness, the NST thread explains that they have never had any issues with pullies getting welded to the crank and never had problems with harmonic balance issues.
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