I don't have an M90 it’s not an ecotech v6 it’s the earlier Buick supercharged v6 setup and I have a ecotech with a ported inlet manifold Jason August 04, 2023 05:05 Updated I see, you have a Buick Series I L67 engine then: http://en.wikipedia.org/wiki/Buick_V6_engine Comments 0 comments Please sign in to leave a comment.
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