Is there any other thing that is diffent about the lowport and the highport sr20de other then the head? Can you use the highport head on a lowport block?

Well here are the diffrences. Intake manifold, throttlebody, inj rail, the metal pipe that runs under the intake manifold were the coolant travels though, EGR pipe from Ex manifold to intake manifold and the EGR system.

Yes you can interchange heads on the diffrent blocks. All the blocks are all the same except fot the BB block and GTIR block, but you can still interchange the heads onto these blocks.

thanks you

So you can put a DE head on a BB DET block?

Interesting... so If I was to dismantle my DE and polish the head, I could bolt it onto the DET... same head?

Interesting.

James