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Section 171 (IGNITION (STi)): General Description: Specifications

WARNING: This page is about a different car, the 2004 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
General Specifications Chart

Item Designation
Ignition coil & ignitor assembly Model FK0186
Ignition type Direct ignition
Manufacturer DIAMOND
Spark plug Type and manufacturer NGK: ILFR6B
Thread diameter, pitch, length : mm 14, 1.25, 26.5
Spark plug gap : mm (in) 0.7 - 0.8 (0.028 - 0.031)
Electrode Platinum, Iridium