Too much expansion and contraction with aluminum to gamble. very cheap insurance my friend.Hell, I know guys who WD-40 their exhaust gaskets. (from DP's back) Oh, and anytime you have a bolt this stubborn - -PB Blaster -*HEAT* -PB Blaster (while hot!) -Tap-tap and voila! (^It's how I got my O2 sensor out without breaking a sweat.)
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