I have searched but could not find the answers

I am thinking about getting the primera header and a high flow resontor to replace the factory resonator In my 99 G20.

I'd rather have the primera than the pacesetter header, and I know I should get the perforated resonator .

so my Questions are:
Can the EGR be welded to the primera header? I want to keep all my emissions. And what is the size of the factory exhaust? How long is the factory resonator or whats the biggest I can fit in it's place length wise?

Thanks for your help

Anybody?

Ericdd:

All i can tell is that Primera´s don´t have emission control, so we have tree resonators and no catalyc converters. The headers intended for Primera´s can´t be used by G20´s and don´t recommend trying.