[jetboy]

So there is actually no rule of thumb, say, the 4EAT can handle 300bph or 260bph or 350bhp?

Obviously, I'm not going to do any swap until the transmission breaks down. The center diff, some oil valves and clutch plates where replaced by Subaru techs in december so it might actually live for a while.. unless that was the beginning of the end. Then I think a 5MT STI box could be a good swap as I do prefer manual to automatic.