Well im doing some cleanup on my engine bay and Im wonder what these lines are for (circled in yellow) they go from the somewhere around the TPI plenum back into the firewall. Is this for the AIR system that goes to the cat? or what

 

Fuel supply, and return lines.

 

So its probably not a good idea to remove them thanks for the help

 

Your welcome. You have a very tidy engine bay there! If you would like to make the lines look nicer, you can add some braided steel lines, in place of the stock ones. I believe Accel sells fittings #74730 just for this purpose....just a suggestion, if you dont like the stock ones.

 

Haha I wish mine was that clean. I just used that picture because it showed the lines good and I didnt have one of mine. The stock ones are kinda in the way maybe Ill check out the Accel ones. Thanks again