I have a problem with my certified muffler install ... I got the 3" inch turbo back kit and there is a sensor bung or hole right at the elbow part near the turbo and it looks like the pipes are supposed to go right where that hole is ... but there is no hole in new pipe?

 

It's the O2 sensor bung. If the new exhaust doesn't have one, just go to a muffler shop & buy an O2 bung (Metric Thread), drill the hole, and weld it in.... or have the muffler shop do all that for ya.

 

On the CM Turbo back system: Doesn't it start after the cast iron O2 elbow? If your fitting is on the downpipe, then that is (according to CM's website) the AIV fitting. (EGR system) A small diameter tube fits to this and runs back up to the EGR system. (I believe)

The fitting is optional with CM. If this is what you are looking for, then contact CM and ask them to send you the fitting. Although, most people eliminate all the EGR junk off their engines. (Depending on local inspections)

 

how do you delete it.