Thread Size: M14*1.25
Hex Size: 16 mm
Center Electrode Material: Iridium
Ground Electrode Material: Platinum
90919-01249 FK20HBR11 3473 E3.68 XP5325 6858 DFH6B-11A
Does spark plug thread length matter?
There are currently two thread reaches (lengths) used: 1/2 inch and 3/4 inch. Never use a spark plug of the wrong reach. If the reach is too short, carbon deposits canbuild up on the threads of the spark plug hole, plus the spark will not properly ignite the air/fuel mixture.