Check this out.....it shows a chip for the 22re (corona).
My understanding is the original chip is a surface mounted type and therefore you can not get a chip in the real sense....you have to replace the entire ecu with one that has had the chip re-programmed.
As for the extractors...my 22R come with them already and yes I agree with the bigger exhaust. I have put this off untill I work out which why to go with the engine change over.
Your point about the ADR regulations has me thinking????