The TMC04 manifold is a GGG40 cast manifold, with a T3 turbocharger Flange; the manifold accepts SPA ¢â‚¬Å“L¢â‚¬ fitting wastegates.
For 2 bolt Wastegate check #ADKTVL03 wastegate adapter‚
The application is Chevy II 153 CID I4 ‚ engines...
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It doesn't fit my 1977 Pontiac151 Iron Duke (perfectly). SPA doesn't advertise it for that I just wanted to experiment. It's close enough I can fabricate a spacer adapter and make it work though. FYI the 151 has bigger ports than the 153 head....maybe 3/8" in some dimensions. It seems to be a well-designed and quality part. I'm pleased with it. Price was reasonable too.