Why a br8eg it is supposed to be a b8es or a br8es.
i've run the eg plugs in the past......
ES is standard copper electrode, EG is fine wire nickel alloy center electrode.
edit:
NGK describe the various types of plug as follows:
ES types - standard spark plugs with copper cored centre electrodes for wide heat range. Copper's superior heat conductivity dissipates the heat of combustion away from the firing end, preventing hot spots that can lead to pre-ignition. Copper cored electrodes also mean that longer insulator noses can be used to protect against fouling.
EG types - these plugs feature a smaller diameter centre electrode tip made of conventional nickel alloy. The smaller diameter centre electrode means the voltage required to produce a spark is reduced. However as the tip is made of conventional nickel alloy the service life is reduced and these plugs are best used in applications where plugs are frequently changed.
EV types - these plugs have a smaller diameter centre electrode (1.0mm) than the EG types which is made of Gold Palladium Alloy. The smaller diameter centre electrode means the required voltage is even lower.
EVX types - these plugs have an even smaller centre electrode (0.8mm) than the V types, which is made of platinum. This combined with a taper cut ground electrode has a lower required voltage than the V types. This results in better ignitability along with improved starting, idle stability and anti-fouling performance.
EGV types - these plugs have a centre electrode of precious metal similar to the EV range. In addition, the insulator nose is an improved design to allow better gas flow around the firing end. The ground electrode is shorter and stronger, making the EGV range ideal for the most severe racing applications.
