MagicMT said:
I've read that:
-Jun makes a stroker kit for the 2.5L to 2.6L
-the 2.5L is a bored 2.2L
-the 2.2L is a bored 1.8L
-the 2.0L is a bored 1.8L
Correct me if I'm wrong. My memory sucks! 
But if this is all true it follows that a 1.8L and can be transformed into a 2.6L!!
yes and no.
coming from aircooled VW and porsche flat engines, as long as you have a 1.6L dual port engine, the sky is the limit...you can increase displacement from 1600cc to 1641, all the way to 3.0L+ relatively easily.
all you're bascially doing is slapping bigger pistons and cylinders on the block, allowing clearance for the bigger pistons in the heads, and in the case of a stroked motor, the block must be machined to clear the stroker crank. all in all, it's very simple, and in theory could be adapted to a subaru engine, since they're basically the same.
unfortunately, there are DOZENS of these kits available for VW's, and practially NONE for subarus (outside of the rigoli kit$). welcome to the wonderful world of limited aftermarket...again. if you have tons of money to burn, and access to a gifted machinist, go for it!
also, on a car like an old VW or porsche, you don't have to worry about electronic engine management, aside from making sure that the engine is getting spark. everything else is taken care of through proper carbueration. i doubt you could simply bore and stroke a 1.8 to 2.6L and expect it to run properly.
then there's the set of problems that comes with maintaining a high output engine with thin cylinder walls...unless you like pulling things apart every couple thousand miles (in a best case scenario), it'd probably be best to steer clear.
-adam-
