Help choosing headers for NC emissions
most people aren't going to be looking for the air ports on the exhaust, they won't care.
if I could do my car over again (currently kooks headers 1 3/4 WITH air ports) I would get the QTP headers in 1 7/8 WITH air ports, as WITH CATS you need something else just besides exhaust going over them to cool them off
you can get a tuner to make you or tune your car with an emissions tune, where all the readiness tests are ready no matter what, but i do not recommend just driving around with this tune, as if something does go wrong you will want to know about it
OR, you can find the old cats from old cars... they have a shell that surrounds them. get the shell and weld it on your exhaust
voila you now have cats 
but yeh if you work there then go for it. just make sure your tuner or your has been driven so the readiness tests show ready


