CMI sport tubes. Standing in front of the motor the left header has 3 bolts I can only get an open wrench on and not turn much at all. I know they are not tighten properly. What do you use to tighten them?

I use socket head cap screws with a ball end allen

Also, ARP makes header bolts, stainless, that have a 5/16 hex head, vs normal 3/8 head. On my stellings, with the 5/16 heads, I can get the box end on them.

http://www.summitracing.com/oh/parts...1110/overview/

I have used a crows foot socket for a pair of lightning headers