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3 Inch Adapter for Stock Exhaust Manifold?


78zstyle

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I was considering using my old turbo exhaust (3 inch) for my new N/A engine. If I can, I'd like to avoid buying a set of headers in the name of budget constraints. Is there anyway I can go from the exhaust manifold straight to 3 inch? Can an exhaust shop make this or is the flange on our manifolds a common flange?

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  • 9 months later...

Old topic I know, but i built a 3" exhaust for a bone stock-engined 280Z (In prep for an L28ET when I get around to installing it, but I couldn't be any more pleased with the deep sound of the big pipes). I used the 2-1 merge collector as a base, cut the flange off and pinch welds off, then slide a piece of 3" pipe that I ovalized in a vice over as far as it would go, tweaked the profile to sit tightly over the merge collector (ended up in a bit of a figure-8 shape), then traced the end of the pipe on the collector, cut on the line, then butt welded the 2 pieces together and voila, a 3" down pipe. 

 

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Edited by m1ghtymaxXx
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