Technical glossary - To explain some of the basic specifications by which spark plugs are categorized.
Symbol codes for Denso, Champion and NGK. A breakdown of the manufacturer's descriptive part number.
Spark plug failure analysis - Images and information to help you diagnose why your spark plug has failed or is not operating correctly.
Torque settings - Important figures to ensure you install your spark plugs correctly, fitting plugs securely without over stressing materials.
Tuning considerations - Tuned engines may require a different spark plug to maintain safe/smooth running.
Spark Plug heat ranges - Approximate equivalents of NGK, Denso and Champion Heat Range Scales and a brief explaination.
The answers to many enquiries can be found within the linked content above. However, if you require some personal assistance we will be happy to make a suggestion or answer your enquiry to the best of our ability. We have a wealth of knowledge, gathered over the past 20 years and counting, as the original UK online specialist spark plug and glow plug retailer.
Please note that for modified vehicles or a non standard part, your engine tuner or mechanic should be best placed to advise you of a suitable replacement part. We can usually suggest a replacement part but we are unable to actively recommend a non standard part for any vehicle.