My UR pulley kit w/ Crank for 93-98 supra came in today and now I'm not sure what I need to do because of the different views about them being bad for the engine. I have talk to MVP and they said that they were alright as long as my car was a 6 speed (which it is), but then Suprastore said that they would not even sell them to anybody because of the whole harmonic dampener thing. I'm now stuck and confused about if I should use them or not. I have asked this question before and nobody seemed to what to respond, so I thought I would just try one more time. Should I use them or not? I would really love to put them on my car (Since I have paid for them, and don't want to lose the 20% restocking fee to return them), but I don't want to have to chance hurting my engine just for 15hp. Any help would be greatly appreciated.