DENSO 3473 Iridium Long Life Spark Plug - FK20HBR11

The DENSO 3473 (FK20HBR11) is a premium iridium long life spark plug designed for high-performance and durability in demanding engine conditions. Factory installed on luxury vehicles by automakers such as GM, Toyota, Honda and Mitsubishi, this spark plug delivers exceptional performance and longevity.

Advanced Iridium Technology:

• 0.7mm iridium tipped laser welded fine wire center electrode and platinum tipped ground electrode
• Iridium alloy is six times harder and eight times stronger than conventional platinum
• Can handle the temperatures over 4,000 degrees Fahrenheit associated with high-performance ignition systems
• Sustains spark performance for over 100,000 miles

Quality Engineering Features:

• Machine rolled threads prevent seizing or cross threading during installation and removal
• 100% pre-fired to assure the highest quality possible
• Purified alumina powder insulator provides exceptional strength and thermal conductivity
• Five rib insulator prevents flashover
• Copper-glass seal bonds center electrode and insulator for a gas-tight seal

Technical Specifications:

• Thread Diameter: 14mm
• Thread Pitch: 1.25mm
• Seat Type: Gasket
• Reach: 26.5mm (1.04")
• Hex Size: 5/8" (16mm)
• Gap: .043" (1.1mm)
• OEM Cross-Reference: Toyota 90919-01249, NGK 6858

Installation Torque Specifications:

• Cast Iron: 26-30 lb. ft. Aluminum: 15-22 lb. ft.

This spark plug delivers improved ignitability for better fuel economy, more power, fewer misfires under heavy loads, and faster, easier starts. Perfect for both OE replacement and performance upgrades in compatible applications.