I have been interested in Ebay headers for a while, and have done a good amount of research. I want to tackle this along with some other cosmetic projects over summer.
I live in California so Smog is an issue, and I want to be able to pass the sniff test. Visual honestly has never really been an issue, and once I paint them with a black ceramic paint, they should look mostly OEM.

My plan starting from headers back is-

New hardware
Headers
Straight pipes (dual)
02 sensor (pre cat)
Remove OEM resonator #1
X pipe to dual high flow Offset cats.
O2 sensor (post cat)
weld OEM exhaust rear end to new front end
OEM resonator #2
OEM ZHP muffler


Should be what I want...Im hoping all goes smooth when I take it on.

Im looking at 100 for headers, 200-250 for cats, 150 for welding, 100 for additional components. Total is about 600.....

Feel free to throw your likes or dislikes. Il create a write up when I take it on with prices and pictures if desired for us ZHP folk.