I was wondering how many guys have used UDP and if they have good luck or bad.
I hear they will break the oil pumps on 4v engines..

 

 

Mine have been great, but I don't have a 4v. Heck I don't even have a V8.

I like you have read that they have a tendency to cause issues long term on 4vs. If it were me, I would stay away from them. The minimal gain versus the possibility of a catastrophic failure scares me away.

 

You might try asking this over on the svt performance forums. I would be curious to hear some feedback on these as well...

 

I heard about that on 97 Cobra over here, Japan.
I was recommended March #1158 pulley from my friend for my previous ride, 97 Cobra.