Subaru Outback Impreza Iridium Spark Plug 22401-AA530 PFR6G-11 Strong Ignition Performance

Subaru Outback, Impreza 2000–2010 2.0L/2.5L engine iridium spark plugs (OEM 22401-AA530 PFR6G-11) with iridium electrodes offer about 3x improved burn resistance versus original nickel alloy plugs; more stable ignition gaps and reduced carbon buildup. Iridium tip discharge increases ignition energy for more complete combustion and more direct low-torque response. Replacement difficulty moderate; use a 16 mm socket; torque 25–30 N·m.