underdrive kit

ANYBODY DID THIS ON THE 3.4? IM WANTING TO BUT WANTTO KNOW IF THERE IS ANY GAINS? I MEAN I KNOW ITS CHEAP, NOTHING LIKE SOME MODS, BUT FOR WHAT IT IS?

gains? yes i would imagine, however my SOTP dyno didnt notice anything, and i have no track times from before i installed my under drive crank pulley

if the dyno showed no gains, then there cant be any? i mean for the most part, that how u find true gains.