NGK laser iridium high ignitability spark plugs offer the most advanced OE spark plug tip technology providing the optimal combination of performance and durability. Actual OE or equivalent replacement spark plugs. Laser iridium high ignitability spark plugs are designed to meet the demands of modern engines and are engineered specifically for OE applications. NGK laser iridium high ignitability spark plugs are designed with the most advanced OE tip configurations to maximize service life and combustion efficiency resulting in a quicker throttle response, smoother idle and better cold starts.