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 Just as the knee bone is connected...  Just as the knee bone is connected to the shin bone and the shin bone is connected to the ankle bone, the exhaust system is connected to the H-pipe and the H-pipe is connected to the manifolds. Before any of these subassemblies can be removed, they have to be disconnected from each other. But before unbolting any of the system...  -...the rear oxygen sensors...  -...the rear oxygen sensors should be removed. The sensors screw into the H-pipe behind the catalytic converters, but the harness attached to them runs forward and is attached to the heat shield with a series of clips. After disconnecting the connectors from the car harness, the clips should be pulled from the heat shield.  After all the clips are removed,...  After all the clips are removed, pull the harness loose.  Next, remove the oxygen sensors...  Next, remove the oxygen sensors from the H-pipe with a 7/8-inch open-end wrench or an oxygen-sensor socket.  The first fasteners to be...  The first fasteners to be removed are the bolts that hold the H-pipe to the exhaust system.  Next, the three nuts that...  Next, the three nuts that hold the front of the H-pipe to the exhaust manifolds should be loosened, but not removed.
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