I am thinking of buying UNDERPULLIES for my car but would like to know what exactly its going to be doing... i read that it lightens up the drag on my engine belt and read something about how the duty cycles of the accesories are slowed. But what does this mean and will it compensate the health and longevity of my engine???

If anyone has added this item to their car and has any dyno stats or personal comments please respond.

 

Depends which pulley you get...