78zstyle Posted January 3, 2013 Share Posted January 3, 2013 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? Quote Link to comment Share on other sites More sharing options...
johnc Posted January 4, 2013 Share Posted January 4, 2013 Cut the flange of your old primary pipe and reusue it. You'll need a merge to get the two pipes into one 3" pipe and a good muffler shop should be able to make something that works. Quote Link to comment Share on other sites More sharing options...
78zstyle Posted January 4, 2013 Author Share Posted January 4, 2013 Thanks j Quote Link to comment Share on other sites More sharing options...
m1ghtymaxXx Posted October 11, 2013 Share Posted October 11, 2013 (edited) 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. Edited October 11, 2013 by m1ghtymaxXx Quote Link to comment Share on other sites More sharing options...
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