I have a 2001 Civic LX. I need (2) - o2 sensor. I had one on the downpipe already. Can I have both in the downpipe or I have to have one before the cat and one after. (Note: This is on a turbo setup)
I had a cat custom right undernath the front swaybar. Can I just take the car to an exhaust shop to have them drill a hole and weld one of those round thingy onto it so I can plug in my other o2 sensor in.