i do believe there is a post on theat issue. somethign with the dual cam positioning sensor. (wrx has one and sti has 2)
I also think there was an earlier post that some people w/ a wrx get a cel with a 14lb, and some dont. just as some get a cel with a 9lb and some dont. it is just that it seems the lower weight you go, the more your chances to get a cel.
I still find it ironis STI sell thier performance 13lb flywheel for the wrx. that can cause a cel.
THere whould be a poll to what type of flywheel you have and if you have a cel or not. i was hoping to get the ACT clutch/flywheel combo until i read this thread too.
good note though, the cel will not throw your car into limp mode. or have any adverse effects w/ the cel.