68 or 72mm Throttle body for b series. Its made by rpm, if anyone has anymore questions or interest about it, just pm, taking offers on it

 

I'm confused. Is it a 68mm or 72mm?

Why won't it fit D series? Most TB's that fit B series will fit D series. I forget which ones will and which ones won't.
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i believe its a 68, theres a possibility its a 72 thats why i put that, This one would give you trouble in the throttle cable area i might think, it worked fine on the gsr head i have, ill test it for u on the d series manifold i have, it does not have a coolant flow valve though. It has tps and idle adjustment etc.