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Originally Posted by -=Jeff=-
Makes more sense now.
is the OE Dia of the 93-95 bigger Dia then the 90-92? (not counting the injector boss)
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The late castings have a larger diameter due to additional machining by the factory, 34mm vs 33mm approx. This extra machining does not go all the way through the port however - only about 2in down from the top.