The first step in installing the 2GR-FE engine exhaust manifold is to install the Bank 1 Sensor 1 air fuel ratio sensor before proceeding with other components. Begin by mounting the exhaust manifold sub-assembly RH with its new gasket and torque its 6 nuts to 21 Nm (214 kgf-cm, 15 ft-lbf) following order direction. After this, connect the air fuel ratio sensor connector while installing the clamp. Start by tightening the bolt to 34 Nm (347 kgf-cm, 25 ft-lbf) and the following nut to 35 Nm (357 kgf-cm, 26 ft-lbf) on the manifold stay using the provided hardware. Use a new gasket during installation of the exhaust manifold sub-assembly LH and apply torque to the 6 nuts at 21 Nm (214 kgf-cm, 15 ft-lbf). Transport the No. 2 manifold stay into position while securing its bolt and nut to reach 34 Nm of torque (347 kgf-cm or 25 ft-lbf). Follow the sequence of assembling front exhaust pipe then front No. 3 exhaust pipe sub-assembly and center exhaust pipe assembly and finishing with tail exhaust pipe installation. Crank the propeller connected to the center bearing shaft assembly for 4WD operations only before applying full torque to the connection. Screw in the three bolts of the No. 2 exhaust manifold heat insulator until they reach 8.5 Nm (87 kgf-cm, 75 in-lbf). Screw in the Bank 2 Sensor 1 air fuel ratio sensor along with the No. 2 oil level dipstick guide and radiator reserve tank assembly while securing them with two bolts and torqueing them to 5.4 Nm (55 kgf-cm, 48 in-lbf). Afterwards, attach the hose. Wrap up the No. 1 radiator hose before you add engine coolant for an inspection that checks for both leaks in exhaust gas and coolant. Repair any detected issues at this time. The maintenance of transfer oil for 4WD completes while technicians install the under covers for the No. 2 engine and No. 1 engine before installing the engine under cover assembly. Finish the procedure by taking off the V-bank cover sub-assembly followed by front wheel RH installation.