DENSO FK16HQR11#4 Iridium Long Life Spark Plug

The DENSO FK16HQR11 (part number 3458) is a premium iridium long-life spark plug engineered for exceptional durability and performance. This spark plug features a 0.7mm iridium tipped laser welded fine wire center electrode and platinum tipped ground electrode, delivering superior ignition efficiency and extended service life.

Advanced Iridium Technology:

• DENSO's patented iridium alloy is six times harder and eight times stronger than conventional platinum
• Handles temperatures over 4,000 degrees Fahrenheit associated with high-performance ignition systems including turbo, supercharger, and nitrous applications
• Sustains spark performance for over 100,000 miles
• 360-degree laser weld design ensures durability under the most extreme conditions

Key Features:

• 14mm thread diameter with 1.25mm thread pitch and gasket seat type
• 26.5mm (1.04 inch) reach with 5/8 inch (16mm) hex size
• Pre-gapped to 0.043 inch (1.1mm)
• 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

OE Replacement: Fully compatible with original part numbers 18845-11160 and 267700-5920. Factory installed on luxury vehicles by automakers such as GM, Toyota, Honda, and Mitsubishi.

Installation Torque Specifications: Cast iron heads: 26-30 lb-ft; Aluminum heads: 15-22 lb-ft.