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Denso's new hi-performance spark plug utilizes iridium for its center electrode, a material six times harder and eight times stronger than platinum. Denso created the world's smallest center electrode tip (a mere 0.4mm) for maximum firing performance and reduced voltage saturation. A special tapered tip on the U-grooved ground strap contains the spark inside the gap, enabling it to develop into a hotter flash front for improved combustion.
Plugs are sold individually. Photo shows a set of four. To obtain four plugs, order a quantity of 4. The IK22 plug is recommended for 1.8T engines using a 1 bar chip, and also as the standard replacement for the Audi S4 2.7 Turbo engine.
Iridium plugs are available in different heat ranges to fit the unique requirements of your engine. Contact a NEUSPEED representative for other fitment information.