couple years ago I let my car sat after my engine and tranny rebuilt by my dad mechanic. I feel like it wasn't shifting right; every 2700 rpm it will shift gears, kinda annoying. I told my dad and dad told his mechanic, and I was told just drive it for awhile to break it in. after awhile I did feel safe driving so i used my backup car for awhile. now my backup car tranny died (wont shift gears) and i had to get my GTA running again. after I got inspected and replacing and re-set my kickdown cable, I noticed there was a considerable amount of a gap in the air tube that goes to catalytic converter. so I call around to see if anyone can help. Noone can help right away.


So my question is that can i use like a steel tubing to patch it up. maybe something like this.
http://www.autozone.com/brakes-and-t...?checkfit=true

 

I wouldn't think that coated tubing would stand up to the heat. I'd use a 1/2" diameter uncoated steel tubing.

Where is the gap you speak of located? Are portions of the original tube still there? Do you just need to replace a straight section?

If you just need to replace a section of the tube, you can join the ends with a stainless compression union.

https://www.swagelok.com/en/catalog/...?part=SS-810-6

I've had to do something similar when I replaced my converter a few years ago.

 

The gap is located 2 inches from cats


6 inches may be exaggerated

 

You can use hi temp silicone hose. I got some from a truck parts depot, I think big rigs use it for a turbo oil line or something. Very easy to work with.