I'm looking for a turbo that will fit an escort RST manifold. If I type T3 into ebay.... WOW!

Theres so many numbers being thrown around I cant remember how old I am!

Can someone please clear it up for me. I want around 170-200bhp from a 1.8 silvertop ZT using a decomp plate, FRST inlet, ERST ex manifold and megasquirt - this is a budget build.

After reading every possible post on the internet I cant find a solid answer but the ERST T3 seems to be the way to go.

Are they all the same or are they different housings, compressor wheels, flange fittings?

Any help appreciated! Cheers guys!