like the topic says iv been searchin on here and d-series org. but havent found much info.
1. Will this hurt the motor in any way?
2. Are they worth getting/ any power increase?

Dan

 

I use them on my Y8.

1. I've had them for about two years and have noticed NO negative effects.
2. On the other hand, I didn't really notice any gains, either. I did feel slightly better throttle response, but that's about it. I consider it just something to add onto my mods list.

 

Not worth the $$$. Id rather pay the money for a Unorthodox crank pulley

 

I feel that the money can be spent better elsewhere. If these are the pulleys with a smaller alternator pulley it can also kill your alternator over time and help kill your battery as well. Just something to think about. Also, your headlights and whatnot may dim at idle.

 

cousin has them he said they help with revving alittle bit but not much he got them for looks anyways but not harmed at all.

 

I have a set, worth the money... no
did it help..... barely, not really even noticeable

 

biggest waste of money and doesnt do a anything except make aem richer