DENSO 3437 Iridium Long Life Spark Plug

The DENSO 3437 (K16PSR-B8) Iridium Long Life spark plug delivers exceptional performance and extended service life for demanding automotive applications. Factory-installed on luxury vehicles by automakers such as GM, Toyota, Honda and Mitsubishi, this premium spark plug is engineered to OE standards for reliable ignition performance.

Advanced Iridium Technology:

• 0.7mm iridium tipped laser welded fine wire center electrode and platinum tipped ground electrode
• 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°F
• Employs a revolutionary 360° laser-welding process for superior electrode durability
• Provides improved horsepower, faster starts, and reduced misfires under heavy loads

Premium Construction Features:

• 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: 14mm
• Thread Pitch: 1.25mm
• Thread Length: 19mm
• Hex Size: 16mm (5/8")
• Spark Gap: 0.8mm (0.031")
• Seat Type: Gasket
• Terminal Type: Solid
• Tightening Torque: 22 Nm (Cast Iron: 26-30 lb-ft, Aluminum: 15-22 lb-ft)

OEM Cross References: Mitsubishi 1822A030, Mitsubishi MN163235, Peugeot 5960.C2, Citroen 267700586

Manufactured to the strictest OE performance, durability and emissions standards, the DENSO 3437 spark plug delivers the reliability and longevity expected from a world-leading ignition component manufacturer.