i've had great luck useing the metal manifold gaskets..the last set i put in..i tighhtened..warmed it up tightened again and forgot about it...never touched them again..drove the car for 2 years as a daily driver...........i have used silicone on a race car were the headers were all banged up used the high temp copper stuff ...it workes good to
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Ken Lyons, Slippery rock pa
68 short step 327 t10 4 gear
72 2wd blazer project
70 lwb 305/700r driver
78 caprice project
02 cavalier D.D ( hate it!!)
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