can you guys help me out with this one? i dun really get how undercrank pulley works. and i saw urthodox brand undercrank pulley on ebay. how many do i need? and do i also need to buy the belt? and does it have its brand name on the pulley? thanks!

 

Are you talking about an underDRIVE pulley? It's smaller than stock, so it drives all your accessories at a little slower speed. Then those accessories take a little less HP away from the engine.

The accessory drives are made so that they work normal at idle. With an underdrive pulley you may notice a bit less boost to the power steering at idle, a bit less power from the alternator at idle, etc. If you spend all your time driving & not idling, maybe that's OK.

 

UR does have it's name on the pulleys and the kit comes with replacement belts.