Denso Iridium Spark Plug 3439

Manufactured to OEM quality standards.

DENSO patented optimized iridium-rhodium alloy formula: highest concentration of iridium vs competitors for greater durability

OE style iridium with iridium alloy center electrode (90% Ir) & platinum ground strap

Includes original equipment super ignition plug (Sip) design applications which feature a fine wire iridium center electrode with a needle tip platinum ground electrode

DENSO patented 360 degree laser welding process: ensuring exceptional quality bond and structural strength with the iridium center electrode