I'm trying to figure out if I have a tick. I have a new head but I'm getting a noise from the drivers side just behind the wheel and near middle of the wheel area. It may just be the Kooks longtubes with the slip on collector. It's not loud but you can hear something on that side. The passenger side is quiet. Is the tick loud or when does it really happen? Cold, hot, driving? I don't hear it in the car at idle and I don't hear it at the engine when the hood is up.