I had a horrible experience with Pulleys on the 350.. Not sure if it was the install or the bad pulley out of the batch.. A year of wobbling caused my crankshaft to almost strip the thread off - leading to a new crankshaft for what a couple horsepower a little better response? In and out of shops not knowing what was wrong. Put a stock pulley back on it and bought a new crank bolt and got rid of the car after a couple thousand miles.
If your in need of horsepower that badly Id skip all the bolt-ons and go FI for a couple thousand more..
Somethings arent meant to change.. Something connected to the main component of your motor is one of them IMO.
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2009 MB Sport Package 370z For Sale 31k miles $24,000
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