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Red,
One last note: The purpose of slip-fit exhaust joints as used in aircraft and race cars is to eliminate the need for gaskets or sealer. As I stated previously, a properly fitting slip-fit joint will seal itself. As the heated inner pipe, which is hotter than the outer, expands it creates a very tight joint. Yes, it may spit a little at first, but will seal tightly when at operating temp.
See the photo of the G7A/GT40 Mk IV CanAm car crossover snake-type pipes. These were very exotic pipes, having been fabricated from titanium. But the slip fit did the sealing. Note bolted tabs at joints.
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Tom
"If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough HORSEPOWER." Mark Donohue
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