Before reading this, know that I'm not a genius when it comes to cars.

-I bought a Pacesetter catback exhaust system. Me and my father put it on real quick(he has an autoshop). There are 3 pieces to it. (muffler, middle piece, and a pipe that's straight) On the pipe that is straight there is a hole already that looks like a nut is supposed to go in. But the stock part didn't have this. Was I supposed to cork this thing? What does this hole do? I corked it already. PLZ let me know! thanks

 

I'm not a real genius either,but I think the hole is for a second O2 sensor.Somebody correct me if I'm wrong!!

 

Sounds like that hole is for the 2nd o2 sensor. The pacesetter SHOULD have that hole...

 

should I cork it or leave it open?

 

Neither, you should put your O2 sensor in it. The stock exhaust has the same hole, for the same sensor.

-Red-

 

hmmmm....my stock exhaust didn't have that hole.....which is why I asked this question in the first place

 

pic's would help here.