I`m planning on grtting hooker long tubes. The question that I have is that will I need 02 Bungs or not? The car will be semi emissions legal. I won`t run a cat yet, but I have to pass E check. I`ll probly just weld a cat then. What do ya think?

 

you can run in open loop all the time. then tunning will be a little tough.

 

You can easily make your own bung, just weld a thick washer onto the collector, drill it out to size, then tap it to accept the threads on your O2 sensor.