NGK Spark Plug SILZKBR8D8S Laser Iridium Pack of 6 — OEM Laser Iridium Direct-Fit Replacement

These are genuine NGK Laser Iridium SILZKBR8D8S (97506) spark plugs sold as a pack of six, designed as direct-fit replacements for compatible gasoline engines.

Fit, materials and consistency matter when replacing spark plugs — the NGK 97506 Laser Iridium set provides the specific electrode design, shell size and heat range intended by NGK for engines that require the SILZKBR8D8S specification. This listing is for an authentic OEM 6-pack complete with original packaging and hardware; always verify vehicle compatibility before purchase.

Which vehicles or engines use the SILZKBR8D8S (97506) plug?

The SILZKBR8D8S specification corresponds to a number of gasoline engines across manufacturers. Compatibility depends on thread size, reach, hex, and heat range, so confirm fitment with your vehicle's application guide or an online fitment tool.

• Check thread diameter and reach to match your engine’s cylinder head.
• Compare hex size and seating style to the removed plug for correct installation.
• Use OEM or parts lookup (Amazon Confirmed Fit or NGK cross-reference) for exact vehicle listings.

How do these NGK Laser Iridium plugs affect starting and idling?

Iridium center electrodes maintain a precise firing point and resist erosion longer than many standard plugs, supporting reliable starts and smoother idle for compatible engines. They are engineered for consistent spark performance across life.

• Laser-welded iridium tip preserves electrode shape and gap stability.
• Stable spark reduces misfires during cold starts and idle conditions.
• Durable construction minimizes frequent replacement needs under normal operating conditions.

What are the installation and maintenance considerations?

Install these plugs using the correct torque and gap settings specified by the vehicle manufacturer. NGK Laser Iridium plugs typically come pre-gapped, but it's good practice to verify the gap and apply anti-seize to the threads only if recommended by NGK or the service manual.

• Confirm recommended gap and torque in the service manual before installation.
• Use a torque wrench to avoid over- or under-tightening the spark plug.
• Replace ignition boots or seals if they appear worn to maintain performance.

Why choose genuine NGK parts instead of aftermarket alternatives?

Genuine NGK spark plugs are manufactured to NGK specifications for dimensional accuracy and material quality, ensuring consistent fit and expected heat range performance. Authentic parts reduce the risk of fitment issues and maintain the engine design intent.

• Original packaging and hardware ensure you receive full OEM components.
• Manufacturing controls and material standards reduce variability between units.
• NGK’s part numbers and cross-references simplify matching plugs to applications.

Who is this for: Mechanics, DIY car owners, and fleet technicians seeking a reliable, OEM-spec replacement spark plug for engines that call for the NGK SILZKBR8D8S (97506) specification. Choose this 6-pack when you need genuine NGK Laser Iridium plugs in original packaging for consistent performance, accurate fitment, and straightforward installation. Before ordering, verify your vehicle’s required plug specification using the vehicle manufacturer’s guide or a trusted parts lookup service.