I am installing a SC this weekend or next week depending on when I get it shipped to me.
I know that the UDP gains HP by reducing the weight (85%) and diameter (15%) but will it lower or raise my boost on the SC?
If it lowers it. Who makes a pulley that is lighter but the same size?

 

it will underboost your car....put the stock one back in.

 

I had to take out my UDP when I put the blower in too... If your running the 3.33 pulley it'll be like your running a 3.6 with the udp on there

 

no one makes a lighter one in the oem size unless you have one custom made. thought about it but probably not worth the $.

 

if you don't put your oem UDP back in you might screw up your car. When you get a supercharger usually all the pulleys get heavier.

 

Thanks for all the info. I have done some asking and so far no one makes a lighter OEM sized pully. But I will still look.