NGK SILMAR8A9S Spark Plug (90992)

NGK Iridium Spark Plugs

NGK iridium spark plugs currently represent the highest-quality technological solution. They feature an iridium-alloy on the middle electrode welded on in a special process using laser. One of the worlds hardest metals, the precious metal iridium starts melting at a temperature of 2450°c and is therefore very resistant to spark erosion. By using it, the service life is doubled on average in comparison to standard nickel spark plugs.

The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX ideal for the performance enthusiast. Iridiums extremely high melting point is perfectly suited to todays high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability.

• Fine iridium tip ensures high durability and a consistently stable spark
• Trivalent metal plating for superior anti-corrosion and anti-seizing properties
• Outstanding acceleration, high fuel efficiency and durability

NGK are the worlds number 1 motorcycle OEM fitted spark plug

From passenger cars and bikes to Formula 1 and motorcycle racing, NGK Spark Plugs has established itself as a heavily relied upon original equipment manufacturer (OEM). With its clear commitment to delivering the highest quality and continuously raising the bar, NGK Spark Plugs is the obvious brand of choice for a wide range of vehicle manufacturers.

Fitment Summary
Compatible with 87 models (yearly).

• Honda: CB750 Hornet, CMX1100 A, CMX1100 A2P, CMX1100 A2R, CMX1100 D2P, CMX1100 D2R, CMX1100 DM, CMX1100 DN, CMX1100 DP, CMX1100 Rebel, CREF290 , CREF290 IE, CRF1000 AG, CRF1000 DG, CRF1000 L, CRF1000 LA, CRF1000 LA2, CRF1100 L, CRF1100 LA, CRF1100 LDA, NT1100 AM, NT1100 AN, NT1100 AP, NT1100 DM, NT1100 DN, NT1100 DP, NT1100 DR, SXS1000 Pioneer, SXS1000 Talon S2R, SXS1000 Talon S2X, SXS1000 Talon X4 S4X, XL750 Transalp ABS RD16, XRV1100 Africa Twin
• Yamaha: MT03 320 MTN320-A