NGK DILKAR7M8 Laser Iridium spark plug — single OE-equivalent iridium tip for improved ignition and longevity

NGK DILKAR7M8 Laser Iridium is a genuine NGK iridium spark plug designed to deliver consistent ignition performance and long service life as an OE-equivalent replacement.

This NGK DILKAR7M8 (part 90288) spark plug is the factory-style iridium option intended for reliable starts and steady combustion in compatible gasoline engines. Built to NGK specifications, it pairs a fine iridium center electrode with precise manufacturing tolerances to maintain stable spark gaps and resist wear over extended use. The plug ships individually in NGK packaging and matches the dimensions and thread fit used by many original equipment applications.

What makes the NGK Laser Iridium different from standard spark plugs?

The iridium center electrode is much finer and harder than traditional nickel tips, which concentrates the electrical discharge and helps sustain a strong spark with lower voltage demand. That design improves durability while keeping the ignition consistently timed as the plug ages.

• Fine iridium center electrode for concentrated spark
• High melting point metal resists erosion and wear
• Tighter manufacturing tolerances for consistent gaps
• OE-equivalent fit and heat range for compatible engines

How will this spark plug affect engine starts and throttle response?

Because the iridium tip creates a focused, reliable spark, you can expect crisper ignition and steadier combustion under a range of engine speeds. That stability helps with smoother startups and more predictable throttle transitions without alterations to your engine tuning.

• Improved ignition reliability during cold starts
• Consistent combustion across RPM ranges
• No ECU modifications required for typical replacements
• Maintains stock driveability characteristics

What are the physical specifications and package details?

This listing is for a single NGK Laser Iridium spark plug (part number 90288) packaged individually. The plug's compact package measures approximately 3.70 x 0.94 x 0.83 inches and the single-unit weight is roughly 0.088 pounds, making it easy to store or ship.

• Item package dimensions: 3.7008 x 0.9449 x 0.8268 inches
• Package weight per unit: ~0.0882 lb
• Sold as a single spark plug per package
• Manufactured to NGK quality and OE-equivalent specifications

When should I replace this spark plug and what maintenance tips apply?

Replacement intervals vary by vehicle and driving conditions; consult your vehicle’s service schedule for recommended mileage. Visually inspect plugs during routine service and replace if the electrode shows heavy wear, fouling, or damage. When installing, use a torque wrench and follow NGK torque specs to prevent misfit or thread damage.

• Check manufacturer service intervals for replacement mileages
• Inspect for electrode wear, deposits, or cracking
• Use correct torque and anti-seize only if specified by vehicle maker
• Replace in full sets where recommended by the vehicle manufacturer

Who is this for: The NGK DILKAR7M8 Laser Iridium plug is ideal for drivers and technicians who want a direct-fit, high-durability replacement that mirrors original equipment performance. It’s suitable for owners maintaining factory specifications, fleet operators seeking consistent ignition across vehicles, and enthusiasts who prefer durable iridium electrodes for longer service intervals. Confirm compatibility with your vehicle’s required spark plug code before purchasing.