These are part of the exhaust system, and are normally bolted on using a flange and gasket, but some are welded and must be cut out and a new converter welded back in place.
Mark (mhpautos)
Jan 7, 2008 at 4:45 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.