I installed an LRD header and slip on and there is a leak at the headpipe. Like a dummy I installed with no gaskets. I did not see any when I pulled the header off and was in a rush to get it on. Sooo, I have to pull off the header and I’m guessing remove the old gaskets before putting on the new ones. Do they just sit inside the exhaust port? Will they be a PIA to get out? How do you put the new ones in? Stick them in the motor or over the header, etc?