I like your install! Very clean man! Thanks everyone for your input. Sounds like the consensus is to get a plug for that hole and then have a shop weld a new bung in the end of the DP or test pipe.

 

Kinda off subject, but would there be any problems with me running my wide band in to the remote wire off of my head unit? I like the idea of this because if I ever need to turn the wide band off, I can use the stereo. It will act as a toggle switch. I more then likely will never need it off, just thinking of those late nites when it is hard to see, I could just flip it off to give me a little easier time seeing.