Yes get the remap - Subaru will do a patch which allegedly sorts the running lean on pot 4 which results in ringland failure - however later model 330's have still suffered in some cases from ringland failure.
When I enquired with my STi with PPP pack installed same as 330s I was advised the PPP tunes addressed this - I dont know which model you have, assuming the 295 bhp WRX STi version but I would def get a remap by an independant instead of the subaru patch the reason being you get a map tailored to your specific vehicle which will give results as described above as well as power with sports backbox and hi flow filter (330 bhp or there abouts)
Also please be aware lack of oil can also be a cause of failure with these engines so if you are looking at track work where lots of high speed corners and higher revs cause engine oil flow away from pickup in sump I would advise looking at sump baffles and upgraded oil pump