I need to replace my header, because the donut gasket for my new catalytic convertor won't fit due to old welds on the old header.

My cat cracked, and I took the oppurtunity to bolt up a high-flow.

What are my options for a d16y8 exhaust manifold (header?).

I understand the B-series stuff won't work. Will other D-series stuff work? I don't mind at all going stock, I want to know what my options are...

Ideally if someone said I higher flowing GSR header would work, that'd be nice, but I'm pretty sure B-D series stuff doesn't swap.

thanks
-PHiZ