Iridium Long Life Fine Wire Spark Plug

The Denso 3484 is an iridium long-life spark plug engineered for extended durability and consistent performance. The spark plug features a precision 0.7mm iridium fine wire center electrode, laser-welded for durability, and a complementary platinum-tipped ground electrode. This design ensures efficient combustion and longevity. Construction details include machine-rolled threads that prevent seizing or cross-threading during installation and removal, providing a smoother and more reliable fit. The insulator is made from purified alumina powder, offering exceptional strength and thermal conductivity. A five-rib design on the insulator prevents flashover, ensuring a strong spark. Additionally, a copper-glass seal bonds the center electrode and insulator, creating a gas-tight seal for optimal performance. With a thread diameter of 14mm and a pitch of 1.25mm, a gasket seat type, and a reach of 26.5mm (1.04 inches), this spark plug is designed for a secure fit. The hex size is 5/8" (16mm), and it features a solid terminal type. The center electrode is projected and fine wire, with a gap set at .031" (0.8mm). The ground electrode is also fine wire, and the unit is designed as a resistor plug. The Denso 3484 is rated for a longevity of 80,000-100,000 miles and comes with a 12-month warranty.