under drive pulley?

[daveauth21]

how well does a ud pulley work on a auto? should i put it on or just sell it?

[Paonessa]

put it on if you got it. i'll take it off your hands if you decide no to use 'em

[Caracicatriz]

What does an underdrive pulley do?

[97wvmax]

if u got one of the unorthadox ones, ill put a bid for it if u gettin rid of it

[un4gvnbb]

under drive pullies are smaller then regular stock pullies (alt, water pump, etc. where the belts are)

they are also lighter. if you think of a bicycle, the smaller the gear's are the more power you get, also for every pound you take off of the crank shaft you get something like 2 or 3 hp.