Originally Posted by SUNNYboi 
Just don't underdrive accesories. Like P/S and altenator.
Get the crank and waterpump pullie and your set.
What's wrong with getting the P/S and alternator? Are you just saying this for turbo or N/A as well?
Originally Posted by BenFenner It may be a scare tactic, but it is true. The amount you may be affected by this truth is up for debate. Your engine life will be lessened, but by how much is up for debate. Those running pulleys without harmonic dampeners for years will say there's little to worry about and may have the final word on this, but to say the phenomenon doesn't exist is wrong. To be fair, the longer crankshaft of these BMW engines are more prone to harmonic damage, making these claims ring more true for those engines than ours.
I remember it. I actually argued against the need for it in that thread. This was before I completely understood what I was talking about, and have since changed my stance.
This is maybe the most important factor in all of this.
It's not so much the power you have to worry about, but the revs.
If you want my advice, I'd keep the factory crank pulley and save the money for other things. I'd certainly do the flywheel though. If you've already spent the money, then I guess you might as well toss them on.
^There isn't a rubber damper we can get to put on our UR pulley is there? If so,(which I don't think there is), what would the thickness size have to be for it to have a perfect fit?
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