you said "if only nissan had used cat studs 3/8 unc they would never snap there tough old bolts"
well we had so many problems when removing the exhaust manifold on my toy we decided to replace them with items that would resist corrosion much better! we thought about going all titanium but would have had problems with the titanium studs so went for a more corrosion resistant steel and high temp titanium locking nuts. It is worth the aggravation!