I have seen a catless bassani y pipe for my truck but the only question is does anyone know what to do with the plug that goes into the pipe before the get to the cats? has anyone put one of these on their truck any info would be helpful on this. No i don't have emmisions

 

I just cut a bolt to about 1/2 inch and shoved it in there. On mine it took a 3/4 inch bolt. Or you can go find an old o2 sensor that doesn't work, will fit in the hole perfect. The bolt you have to strip the threads some, but it wont fall out or leak so no big deal. Never need to take it out. Hope this helps