I'm not an engineer, so any of you who are feel free to correct me.

From all that I have read and studied in these forums, running any crank pulley that isn't damped might, over the long haul, cause problems with your engine. Based on this knowledge, and based on my choice of taking a cautious approach to my mod program, I will never put a UDP on my car unless the UDP addresses the issue of harmonics. No other pulley does this, to my knowledge.

Even if the Fisher unit incorporated a damper that was no better than stock, qualitatively, I think it would be worth a few extra bucks for the extra protection and peace of mind it would provide. Unfortunately, my cautious approach also means there's no way in hell I'd be the first guy to get one of these and slap it on. I'll leave the "test program" to more adventurous souls. (Besides, I'm broke.)

"Function before fashion."

'96 Contour SE