What size header flange gasket for M/T SS headers 455 with 2.5" exhaustexhaust? Went to NAPA they have a ton of 3 hole gaskets to choose from but I don't know the internal diameter.
My MT's are 3 1/2". Can you not take the old gasket with you? You are talking about the collector outlet, right? The header flange bolts to the head.
Yes the collector outlet. Are all the BBB MT collectors 3.5"? I "could" take the old one with me but I have not taken apart yet and NAPA closes at 12:30 in my town.
I'm not sure, mine are 3 1/2". I'd take the old one, or buy 3" and 3 1/2" gaskets and return the ones that don't fit. It's one or the other.
I still need to push REMFLEX gaskets. CAREFULLY measure the bore on the collector and center to center on 2 bolt holes (3 bolt flange) or diagonally on a 4 bolt. REMFLEX has a million to choose from for a perfect fit! The collector gaskets are about $12 from THEM direct. Bill in TR
