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Torque Specifications: RX300

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
TORQUE SPECIFICATIONS (RX300)

Application Ft. Lbs. (N.m)
Air Intake Chamber Bolt/Nut 32 (43)
No. 1 Engine Hanger Bolt 29 (39)
Spark Plug 13 (18)
Suspension Upper Brace Bolt 59 (80)
Throttle Body Brace Bolt 15 (20)
Windshield Wiper Arm Nut 18 (24)
INCH Lbs. (N.m) 
Ignition Coil Bolt 69 (8.0)
Valve Cover Bolt 69 (8.0)