Bosch 9691 Double Iridium Spark Plug

The Bosch 9691 Double Iridium Spark Plug delivers advanced original equipment technology engineered for both high performance and extended service life. This premium spark plug features an ultra-fine 0.6mm iridium center electrode and iridium ground electrode inlay that work together to provide superior ignitability and up to 4 times longer life compared to standard copper spark plugs.

Key Features:

• Double iridium design with ultra-fine wire center electrode and iridium ground electrode inlay for maximum performance and durability
• 360-degree continuous laser weld fuses the iridium firing pin to the base for increased longevity
• Copper core center electrode helps prevent pre-ignition and fouling while providing a broader heat range
• Nickel-plated shell with rolled threads offers corrosion protection and eliminates the need for anti-seize compound
• Tapered ground electrode maintains optimal ignition throughout the spark plug's service life
• Pre-gapped at the factory for quick, easy installation right out of the box
• Ribbed insulator design prevents flashover

Specifications: Thread diameter 12mm, thread pitch 1.25mm, reach 26.5mm (1.04"), hex size 5/8" (16mm), gap 0.028" (0.7mm), gasket seat type, solid terminal, projected center electrode with resistor. Compatible with modern gasoline engines including Gasoline Direct Injection (GDI) technology. OE-matched spark position ensures proper fit, form, and function.