cylinder heads
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Duh. I *know* that. But you said of the AAN vs the ABY heads that "Pretty much identical other than the engine code stamp on the back." referring, I thought, to some markings on the ABY head. I am confused? What did you mean? Do you have a photo of said "engine code stamp on the back"?
The reason I am pushing the point is if there is some new info, I would up date my AAN Engine Numbers: Location and Engine Build Dates post with the new info. See link:
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avantComment

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