I had 2 sets of heads studs, B16 and GSR. Unfortunately, both sets were not in their boxes(took them out stupidly to work on 2 projects) and I happened to grab the B16 studs for the ls-v project I had. I didn't bother double checking thinking that it was the right pile. Low and behold, started up the car and after warm up it was leaking at all sides of the motor. That's when I double checked studs and slapped myself in the face. Had to pull everything off, resurface the head again, and buy a new HG. What an expensive lesson, but I learned from it. Anyhow, that setup did 270hp and 204tq on a greddy kit with a custom 2.5" dp on 9psi.