Well Forge do really really good Piston ones that blatantly would flow more than the pissy bailey ones, and also they do ones with a bigger (about double) diameter inlet so they fit on S14 200SXs etc.

These are brand new, still in bubblewrap, i wonder if theyl do some kind of trade-in, they are nice folk down Forge

You think that diagphrams will split at 30-35psi boost? Thought theydve made em better than that