Tried to I install Hotshot header last night. Got everything apart and could not get the damn header nuts off the studs. 3 of the 5 are mushed now. I tried all kinds of different sockets and wrenches. Metric, Standard, six point, multi point, nothing worked. I was so pissed, it was midnight and I had to work the next day, so I had to put everthing back together and go to bed pissed off and tired and very dissapointed. I could pay some exhuast shop to do it but that defeats the point of saving money. What size socket is the right one and what size drive, extension, etc. should i use?