I'm having trouble getting headers to seal up. I'm trying to take the passanger side header out to mange sure the flange it not bent and noticed there is a tube running from the back of the intake to the header. Can I permanently remove that tube and make a delete plate for the intake? Or does it need to stay connected? Most of the pollution crap is missing already. Oh it's a 94 z28 with a 6 speed

 

I believe that tube is to the EGR valve. You will need to block off the EGR valve if you do not hook it back up. Search EGR delete on a LT1. My 93 has it deleted.

 

You'll have to plug the pipe on the header and where the EGR pipe sat on the back of the intake. Fair warning, getting a block off plate in there while the intake is in the car is a PITA.

Did you make sure you used Percy's Seal-4-Good header gaskets? If not, I'd order some right now.

 

second percy's gaskets