Denso Iridium Long-Life Spark Plugs 3297 — 8-Pack .043" (1.1 mm) Gap, Durable Ignition

Denso 3297 iridium long-life spark plugs are a genuine 8-pack of high-precision ignition plugs with an iridium center electrode and a factory-set 0.043" (1.1 mm) gap designed for durable, consistent spark performance.

These Denso 3297 spark plugs are engineered for reliability and longevity, delivering steady ignition for compatible gasoline engines. The iridium core provides a thin, wear-resistant electrode that maintains gap integrity longer than standard plugs. Packaged as a set of eight, these plugs are ideal for multi-cylinder engines and for users replacing all plugs at once to restore even firing and efficient combustion.

How do these spark plugs improve ignition consistency?

The iridium center electrode and precise manufacturing reduce electrode wear and ensure a stable spark over many miles. A thinner electrode tip requires less voltage to fire, which helps maintain reliable combustion as the plug ages.

• Iridium center electrode for durable spark delivery
• Factory-set 0.043" (1.1 mm) gap to match many OEM specifications
• Consistent gap retention reduces misfires and rough idling

What vehicles and situations are these Denso 3297 plugs suited for?

These plugs are designed for gasoline engines that call for the Denso 3297 specification or similar iridium long-life plugs. They’re commonly used in passenger cars, light trucks, and performance applications where long service intervals are desired.

• Compatibility with engines specifying Denso 3297 or equivalent part numbers
• Good choice for multi-cylinder engines requiring eight plugs
• Recommended for drivers wanting longer life between replacements

What are the package and physical details I should know?

This product ships as a compact set of eight individual plugs, each built to Denso quality standards. The pack dimensions and light weight make it easy to store or carry to a workshop for installation.

• Package size: 9.5" L x 9.5" W x 0.5" H
• Package weight: 0.5 pounds for the full eight-plug set
• Includes eight spark plugs—one-plug-per-cylinder replacement

How should I install and maintain these spark plugs?

Install using proper torque and a gap check if required by your vehicle’s service manual. While the plugs come with a specific gap, always verify compatibility and follow torque specs to avoid damage to threads or the electrode.

• Confirm vehicle OEM recommendations before installation
• Use a torque wrench to the manufacturer’s specified torque value
• Inspect ignition boots and wiring when replacing plugs

Who is this for: This Denso 3297 8-pack is aimed at DIY mechanics, professional technicians, and vehicle owners who need a full set of long-life iridium spark plugs for compatible gasoline engines. It’s especially useful for those replacing all plugs at once to ensure uniform ignition performance across every cylinder and for anyone seeking a balance of durability and consistent electrical firing without frequent replacements.