Bosch 9603 Double Iridium Spark Plug

The Bosch 9603 Double Iridium Spark Plug delivers exceptional performance and longevity for modern gasoline engines, including those with Gasoline Direct Injection (GDI) technology. This premium spark plug features both an ultra-fine wire iridium center electrode and an iridium ground electrode inlay, engineered to provide superior ignitability and extended service life.

Key Features:

• Double iridium construction with iridium firing pin and iridium ground electrode inlay offers 4x longer life compared to standard copper spark plugs
• 360-degree continuous laser welding of the ultra-fine wire iridium electrode increases durability and ensures superior retention
• OE fine wire design requires up to 24% less voltage to ignite, delivering enhanced performance and fuel efficiency
• Tapered ground electrode design optimizes flame kernel growth for improved combustion
• Copper core construction provides broader heat range to resist pre-ignition and fouling
• Pre-gapped at the factory for hassle-free installation - no gap adjustment required
• Nickel-plated rolled threads offer superior corrosion resistance and eliminate the need for anti-seize
• Ceramic insulator delivers high dielectric strength for reliable performance

Bosch Double Iridium Spark Plugs represent advanced original equipment technology, meeting or exceeding OEM specifications for fit, form, and function. Simply install right out of the box for immediate performance improvement and long-lasting reliability.