So I'm planning on getting a turbo back and I wanna use an O2 sensor spacer threaded into the pipe to keep the CEL off. My question is, do most turbo back exhausts come pre drilled with the threads already for the O2 sensor/spacer? Or will I have to drill a hole and weld in a bung?

 

some do, some dont most have a 2nd o2 bung on the Test pipe, for widebands. What company?

 

Not really sure which I'm buying yet, haven't done much research. But thinking about AMS.

 

I ran on my old evo with a 9 swap some RNR catback and a cheap test pipe. your downpipe is going to be what you should think about. If your going bigger turbo later you might not want to change it just yet. But you can use the FP chargers on stock DP style.

 

I'm staying stock turbo. I don't do any kind of racing at all. It's a weekend/summer car. I'm going down the bolt on/tune road.

 

If you are buying a new, im pretty sure they have an option for bung.

 

Excellent

 

The AMS exhaust comes with a bung on the catback

 

I have a buschur Catback I'm about to take off. It's not loud enough for me as silly as that sounds, has a nice decent tone just not what I want if your interested but I dont believe the catback itself have a bung.