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Old 02-05-2010, 01:53 AM   #1
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Default NA/NB DP compatibility

Hey guys,

Does anyone have info on what it takes to have an NA downpipe bolt on to an NB chassis at the factory location to the mid-pipe? Has anyone converted one or modified one to fit?

Are the NA log manifolds compatible with the NB chassis?

Thanks for any info.
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Old 02-05-2010, 09:01 AM   #2
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No it can't, I'm not a hundred precent sure but I believe its only 94-95 miatas that will accept the 1.6L down pipe. I know this because when I put a 1.8 in my 92 I needed to get a 94-95 exhaust manifold that was only different by the downpipe flange.
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Old 02-05-2010, 09:38 AM   #3
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An NA 1.8L log manifold will fit an NB 1.8L head (same bolt pattern), however, the EGR locations are in different spots on the manifold.

And I think the downpipe can fit as well as far as clearance, but it's a matter of the difference in dimensions and specs on the cat and flange. Not sure what it would take to fit there.
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Old 02-05-2010, 07:33 PM   #4
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Thanks for the info.
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