^that's highly unlikely since the persona is the sedan and bug-fixed version of gen2. so if persona is released first, it'll have all the flaws of the original gen2, and the so called later released gen2 will be the bug-fixed, aeroback version of the persona. time paradox eh?

maybe at that time they feel that they don't need a sedan version of gen2 because they have the waja?

for campro engines (Gen2, neo, waja campro, persona), the O2 sensor is just before the cat (about 1-2 inches).

i leave mine stock as it is. until R3 releases their cat-free performance exhaust system for the neo. as for persona, i think it's ok to remove it, since there are R3 performance headers for Gen2 which is compatible with the persona. as for the rest (mid box and muffler) that i'm not too sure if it's the same plug and play with gen2 or not.

old habit die hard, i guess

you can't argue with incompetency