All the cylinder head nuts I've pulled off my 2.0L have helicoils of a different material in them... Is this normal? I mean it's 8/8 - the only reason I even looked was one of them was coming out (think I found why it's backfiring on decel.)...

OH sweet!!! how hard are helicoils to put in? I need one REAL FREGGIN BAD!!!!

I just pulled one out of the 1.7L and it's got a coil in there as well... I'm guessing these came stock... they're weird nuts for sure, but I haven't found one that DOESN'T have a coil in two cars...

Weird

not stock for sure...racers put them EVERYWHERE in the T-IV....the threaded studs get corroded after time....and end up like my car with exhaust leaks at the head....

"Cylinder head nuts"? You sure? Never seen one with a 'coil, and there would be NO need for them. Not much direct heat like the exhaust. Exhaust nuts came with them, and I save everyone I can find, because they work really well. The Cap'n