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930gt-40r 930gt-40r is offline
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Join Date: Jan 2007
Location: Boca Raton, FL
Posts: 2,063
I agree about the smaller lower plug (12mm) I just witnessed my friend's heart break (he knows who he is) as 3 of his twin plugged heads were cracked between the thread tap to the exhaust valve seat (this really sucks) However he had 3.2 heads which have a more porous alloy than the actual 930 heads do- so I dont know- I would go 12mm for safety.
Kris @ Tech9
86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 12-08-2007, 06:59 PM
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