To avoid this kind a problem always insist on genuine ngk brand spark plugs.
Original fake ngk iridium spark plugs.
The fake plugs however do not have any iridium on the centre electrode.
Why use potertially harmful imitation spark plugs in the engines of valuable cars motorcycles and general purpose machinery.
Even spark plugs with unique brand name can be imitation counterfeit if the part numbers resemble those of another brand.
To avoid this kind α problem always insist on genuine ngk brand spark plugs.
The use of imitation spark plugs can damage your engine.
These are the ngk iridium ix spark plugs and the fakes are often found on ebay and other.
If you have been following any of the vag 1 8t tfsi tuning scene over the last few months you will have noticed a few posts on facebook groups such as 1 8t 20v tuning and tfsi tuning that there have been fake ngk spark plugs going round which have huge negative effects on stock and tuned engines.