MRZ underdrive crank pulley?

[The Beer Guy]

hey i just ordered an underdrive crank pulley from MRZ and was wondering if there is anything i should expect or should know. i already know a way to help the alternator out. but what else should i look out for ?
id really like to hear from ppl who have one or had a MRZ underdrive crank pulley or the lightweight crank pulley. thanks

 

[YelloEye]

MRZ crank pulleys have been known to leak oil.

 

[Tuner923]

undersize crank pulleys make your alternator's efficiency output rpm higher. before installing check the efficiency rpm and check it after. if it's too high you may need to change the size of the alternator pulley.

 

[The Beer Guy]

great... i love how the say on the site that they dont cause oil leaks maybe it was a type lol

 

[YelloEye]

They had a larger problem leaking oil, now its a lesser problem with the new stainless insert. But they do still leak oil, plus they don't have a balancer in them either.