Oxygen sensors

There are two, one on each manifold. Unhook the wire connector from each one and using a proper wrench, (either a socket with a cut out for the wire or a combination wrench) remove the sensor. Be advised that due to the heat they may be seized to the manifold. If this is the case the manifold will strip and you will have to tap it again after you take them out. When you replace them be sure to use the lubricant that comes with them for proper conduction and antisieze properties. Reconnect the wire when they are tight (dont over tighten)