DENSO 3492 Iridium Long Life Spark Plug DXE22HQR-D11S

The DENSO 3492 (DXE22HQR-D11S) Iridium Long Life Spark Plug is factory-installed on luxury vehicles by automakers such as GM, Toyota, Honda, and Mitsubishi. Designed for durability under the most extreme conditions, DENSO's patented iridium alloy is six times harder and eight times stronger than conventional platinum and can handle temperatures in excess of 4,000 degrees Fahrenheit.

Advanced Iridium Technology:

• 0.7mm iridium-tipped laser-welded fine wire center electrode with platinum-tipped ground electrode
• DENSO patented optimized iridium-rhodium alloy formula with highest concentration of iridium (90% Ir) versus competitors for greater durability
• 360-degree laser welding process ensures exceptional quality bond and structural strength
• Sustained spark performance over 100,000 miles—up to three times longer than conventional plugs

Performance Features:

• Tapered cut ground electrode increases ignitability and decreases quenching
• Machine-rolled threads prevent seizing or cross-threading during installation and removal
• 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
• 100% pre-fired to assure the highest quality possible

Technical Specifications:

• Thread Diameter: 12mm, Thread Pitch: 1.25mm
• Reach: 26.5mm (1.04"), Hex Size: 9/16" (14mm)
• Seat Type: Gasket, Terminal Type: Solid
• Gap: 1.1mm, Resistor Type
• Torque Specs: 11-18 lb-ft (Cast Iron and Aluminum)

OEM Cross-Reference Numbers: Honda 12290-5A2-A01, Honda 12290-5A2-A02, NGK 91578, NGK 96964

Manufactured to the strictest OE performance, durability, and emissions standards. This premium spark plug delivers improved horsepower, faster starts, fewer misfires under heavy loads, and better fuel economy for high-performance and everyday driving applications.