Aftermarket headers unfortunately don't seem to be a viable option, for multiple reasons:
1) I'd have to give up the Corsa exhaust; this exhaust is way too loud with headers. This will also exceed sound limits at the tracks I frequent.
2) I have to do emissions tests for the next 10 years before my car is exempt.
3) I don't want my car to smell.
4) I absolutely hate rasp, so it can't have any. Want it to sound exactly the way it does now.
It is my understanding that I can't meet all of this criteria if I do aftermarket headers. I'd like to know my options that involve keeping the Corsa and not making my ears bleed and have it sound like crap.
I will also say that I haven't researched it too much yet...