If the seal of this gasket is broken, exhaust gases break through to the outside, accompanied by a characteristic sharp sound (the collector "cuts"). If the malfunction cannot be eliminated by tightening the catalytic converter mount, replace the gasket. Replacing the gasket is described in the process of removing and installing the catalytic converter (see Removing and installing the catalytic converter and replacing its gasket).
(The original text is provided on an online resource: «FordBook»)