Iridium Long Life Spark Plug

The Denso 3457 FXE24HR-11 is an iridium long life spark plug, designed for durability and performance. It is factory-installed on many luxury vehicles by automakers such as GM, Toyota, Honda, and Mitsubishi. This spark plug utilizes a 0.7mm iridium-tipped, laser-welded fine wire center electrode and a platinum-tipped fine wire ground electrode, offering superior ignitability and longevity. The construction features machine-rolled threads to prevent seizing or cross-threading during installation and removal. Each plug is 100% pre-fired to ensure the highest quality. The purified alumina powder insulator provides exceptional strength and thermal conductivity, while the five-rib design prevents flashover. A crucial copper-glass seal bonds the center electrode and insulator, creating a gas-tight connection for optimal performance and reliability. Key specifications include a 12mm thread diameter with a 1.25mm pitch, a gasket seat type, and a 26.5mm reach. The hex size is 9/16" (14mm), and it features a solid terminal type with an ISO overall height. The preset gap is .043" (1.1mm). The center electrode is fine wire iridium with a 0.55mm size and projected projection, while the ground electrode is fine wire platinum with a single quantity. This spark plug is also a resistor type with a value of 5k Ohm and a heat range of 24. Denso iridium long life spark plugs are known for their longevity, typically rated for 80,000 to 100,000 miles, and come with a 12-month warranty. Torque specifications for both cast iron and aluminum cylinder heads are 11-18 lb. ft.