underdrive pulleys
 

What exactly do underdrive pulleys do as far as power gain? I read somewhere that it makes a difference in engine component rpm's. Does this not adversly affect engine components?

RE: underdrive pulleys
 

slowes down your assc,, but you have nothing to worrie about ,,a have hi powered sound system ,,i have no problems,,,steeda pulley ,get the street pulleys [&:]