Bosch Double Iridium Spark Plugs 9613 OE - Pack of 4, OE-matched Pre-Gapped for GDI Engines

These Bosch spark plugs pair an ultra-fine iridium center electrode with an iridium ground inlay and a laser-welded tapered ground electrode to improve ignitability and longevity while matching original equipment specifications. Pre-gapped and finished with nickel-plated rolled threads, they are designed to install easily and resist corrosion without the need for anti-seize. Bosch engineered these plugs to be compatible with many Gasoline Direct Injection (GDI) and modern gasoline engines across leading brands.

How do these spark plugs improve ignition compared to standard plugs?

The ultra-fine iridium firing pin and 360-degree laser welding reduce the voltage required to create a spark, which means crisper ignition and better cold-start performance. The durable iridium alloy resists electrode erosion, maintaining consistent spark gap over time for steadier combustion.

• Ultra-fine iridium center electrode for lower voltage needs and better ignitability
• Laser-welded tapered ground electrode for precise spark delivery
• Double iridium construction for improved wear resistance

Will these fit my vehicle and match OE specifications?

Bosch 9613 OE plugs are manufactured to meet or exceed OE design for fit, form, and function, making them suitable replacements where the OE part number aligns. They are especially intended for many late-model gasoline engines, including models from Hyundai, Infiniti, Kia, Lexus, Nissan, Subaru, Suzuki, and Toyota.

• OE-matched spark position compatible with GDI systems
• Designed to match original dimensions and performance expectations
• Pre-gapped at the factory for direct installation

What installation and maintenance benefits do these plugs offer?

Each plug arrives pre-gapped, saving time and reducing the chance of incorrect gap settings during install. Nickel-plated rolled threads resist corrosion and minimize galling, so plugs extract cleanly from the cylinder head without requiring anti-seize compound.

• Pre-gapped at factory — ready out of the box
• Nickel-plated rolled threads resist corrosion and galling
• No anti-seize required, simplifying installation

How long can I expect them to last under normal driving?

Double iridium electrodes offer enhanced wear resistance versus standard copper or platinum plugs, so they maintain performance across extended service intervals. Actual lifespan depends on driving conditions, engine tune, and maintenance, but iridium plugs are generally specified for longer replacement intervals.

• Iridium elements slow electrode wear for extended service life
• Stable gap retention supports consistent performance over time
• Durable construction suitable for high-temperature, high-pressure GDI environments

Who is this for: The BOSCH 9613 OE Double Iridium Spark Plug (pack of 4) is for owners and technicians who want an OE-quality replacement that prioritizes ignition efficiency, corrosion resistance, and long-life performance. Ideal for drivers of compatible Hyundai, Infiniti, Kia, Lexus, Nissan, Subaru, Suzuki, and Toyota vehicles — and for anyone seeking hassle-free, pre-gapped plugs that meet manufacturer expectations in modern gasoline and GDI engines.