medrick

DO you bolt the stock crank pully back on top of the underdrive crank pully or leave it off. im seeing pics both ways. Need to know asap

thanks

jrherald420

i would only use udp's that have a new ballancer pulley insted of the pulley that bolts on to the stock ballancer.

pcs

if it is a piggy back style udp set up, you bolt up the stock dampner in front of it. personally i wouldnt use that style since by sandwiching a udp between the crank and the stock dampner, you are reducing its ability to do its job. plus you dont get any whp, from them, i got 1 whp from them, not worth it.