by performance do you mean 'chavvy' mods like exhausts and things?
"chavvy" would be sticking fiberglass on and bolt-on 5" jap cut tail pipes, thats nothing to do with performance lol
If you mean discussions on improving performance, its been discussed several times before. Not a huge amount you can do though - mostly you're looking at rechipping for around 10%. Air filter replacements generally do nothing (except noise), frequently lower real performance. Std exhaust is free flowing. Nobody makes manifolds (probably only 'mechanical' thing worth doing) for omegas. 3.0l cams in a 2.5 has been covered several times before.
Basically, it would seem not enough content to warrant it if that makes sense?
yeah thats the basic idea, i was thinking more along the lines of suspension (spring, shock, bushes ARB's tyres etc), engine, (exhaust, manifolds(which i can have made if theres enough interest), plugs / leads, remap's filters (which do increase performance if they are the correct part and in the correct place

) etc) then theres things like transmission (whats the best performing gearbox / diff oil, are there any bolt on diffs from other models to change the ratios, whether anyone has tried a welder in an omega, is there a short shift kit), then theres thing like weight saving, weight positioning etc.
i understand if there isnt enough members interested in the performance of their omegas to warrent its own section though. its just with the amount of posts on such few fourms, its hard to keep up if you dont visit for a few days. and the search function (have to wait 30 secs between) is just a pain in the ass lol