Highlander 2WD V6-3.5L (2GR-FE) (2008)
Spark Plug: Specifications
Maximum electrode gap for a used spark plug:
1.4 mm (0.055 in.)
Electrode gap for a new spark plug (for reference) :
1.0 to 1.1 mm (0.039 to 0.043 in.)
Torque: 18 Nm (183 kgf-cm, 13 ft-lbf)