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Originally Posted by Jake Raby
No, the 2.5 heads are not interchangable with the 3.2.. The bore difference is huge!
The 2.5 is basically its own engine, the 3.2 and 3.4 have interchangeable components.
Build that 2.5 into our 2.9 and then use the 2.5 heads-
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i thought the boxster engines were aluminum so they couldnt be bored out. if they can be what are the specs on the 2.9 and were do i get the internals for it?