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Head Differences


xsv_32
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I recently discovered that the rb25det greddy style plenum wont fit the head im using for my rb30det project...

Could someone advise me as to wether the rb25de intakes vary between r32 and 33?

It has 86mm combustion chambers so its definately a 25, but i need to know how i can distinguish what it came from.

Which ever the result is, what intake can i run without having to cut up my bonnet? (as rb30 blocks are a bigger stroke they're taller) Or is custom my only option if i want the gtr style plenum.

I will be running considerable boost pressures so will the factory valve springs cope at all?

Any help would be great... James

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