Background- for reasons of my own, I'm redoing the engine/5spd on my Civic DX .. it's soon to have an EX driveline. I've talked to a few shops, read through many sources, & talked to ppl .. only CARB legal parts will pass smog. But, I'm being told, if I have noticeable changes from stock, no one will smog it .. because it won't pass CA visual requirements. It seems even a CARB header will raise flags... Questions- Has anyone's (non-BAR'ed) Honda actually passed a smog, legally, with a header? Please tell me what brand header & where?