Yea i did the whole bypass thing too you'll need a 3/8 fitting 1/4 will work but its hell getting it on, but i didnt notice anything but even if its one hp its more than i had. My buddy just put an 80mm bbk on his 05 Z71 it worked so well that i ordered mine the next day. When i get it ill let you know.

2005 joe gibbs, k&n intake, mass air, hypertech, corsa, 4:10 gears