Bosch 955-170-220-90 Laser Iridium Spark Plug NGK ILZKR7A

The Bosch 955-170-220-90 is a premium laser iridium spark plug designed for high-performance engines. This spark plug is manufactured by NGK as part number ILZKR7A (1961) and cross-references to Bosch part number 7431, serving as an OEM replacement for select Porsche, Audi, Volkswagen, and Bugatti vehicles.

Advanced Iridium Technology:

• Fine wire iridium center electrode provides six times greater durability than platinum
• Platinum-tipped ground electrode ensures excellent ignitability and extended service life
• Iridium's extremely high melting point makes it ideal for high-temperature, high-efficiency engines
• Consistently stable spark for optimal combustion and engine performance

Superior Construction:

• 98% pure copper core delivers superior heat dissipation and conductivity
• High-grade alumina silicate ceramic insulator provides exceptional strength and heat transfer
• Trivalent metal plating offers superior anti-corrosion and anti-seizing properties
• Corrugated ribs prevent flashover for reliable ignition
• Triple seals prevent leakage

Specifications:

• Thread diameter: 12mm with 1.25mm pitch
• Reach: 26.5mm (1.04 inches)
• Hex size: 16mm (5/8 inch)
• Gap: 0.035 inches (0.9mm)
• Seat type: Gasket
• Heat range: 7

Installation:

• Torque specifications - Cast iron: 10.8-18 lb-ft; Aluminum: 10.8-14.5 lb-ft
• OE-quality construction ensures precise fitment
• Easy installation and removal thanks to anti-seizing properties

This spark plug delivers outstanding acceleration, improved fuel efficiency, and exceptional durability for today's advanced engine technology. Ideal for performance enthusiasts seeking OEM-quality replacement parts with enhanced longevity.