You'll need a special tool to remove the fuel line connection. I spent about $10 for one at the local auto parts retailer. Remove the black clip and the tool slips into the end closest to the valve cover. The tool spreads open the retaining mechanism inside the connector. Then get underneath the Jeep to disconnect the exhaust manifold from the headpipe. The new manifold comes with a new steel gasket and hardware, but don't damage the retaining ring on the headpipe or that sensor that is so close to the joint.