NGK Iridium X-reference lists common NGK spark plugs and their close equivalent with electrodes constructed from Iridium

Manufacturers X-ref cross references common Bosch, Champion and Denso applications to their NGK equivalents.

Use the NGK symbol key to identify NGK part code information about your spark plugs.

NGK Plug types explains the construction of the various types of NGK spark plugs

Spark plug analysis contains images and cause explainations of common faults associated with incorrect firing conditions

Selection considerations briefly describes configurations where a non standard plug may be appropriate

Gap settings shows a table of equivalent metric and imperial plug gap settings - useful if you have imperial feeler gauges and a metric setting (+ vice versa)

Torque settings gives general guidelines for recommended tightening torques for various head, seat and plug combinations.

Please email sales with any further technical enquiries and we will reply asap.