American genuine Bosch Platinum 4205 HR8DPX

A platinum-tipped spark plug that delivers the electrical spark to ignite the fuel/air mixture in the combustion chamber. The platinum center electrode resists gap erosion for longer service life compared to standard copper plugs, and includes a resistor for reduced electrical interference. Electrode material: Platinum (2.5mm, projected) Ground electrode: Nickel, standard type Gap: .043" (1.1mm) pre-gapped Thread: 14mm x 1.25mm, tapered seat Reach: 17.5mm (.689") Hex size: 5/8" (16mm) Longevity: Up to 50,000 miles