Here using an adaptor I've increased the size of the exhaust tube to increase the vacuuming effect of the exhaust flow. I need an exit hole for the 3/8" NPT pipe that will be screwed into the elbow already installed there. I made this very snug, even threaded it. This will keep perfect alignment and using exhaust clamps nothing should shift about unless I get T-Boned by another Cadillac!

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