Subaru Outback Spark Plug SILFR6C-11 22401-AA781/AA780 SILZKAR7B11 Iridium Ignition

When your Subaru Outback exhibits rough idle, weak acceleration, increased fuel consumption, or difficulty starting when cold, it likely indicates aging or carbon buildup on spark plugs. Spark plugs are responsible for precise ignition of the air-fuel mixture to ensure smooth engine power output. This product fits Subaru Outback 2000-2010 models, OEM numbers 22401-AA781/AA780 and SILFR6C-11, also compatible with SILZKAR7B11. When installing, use a torque wrench to tighten to the specified torque to avoid cylinder head thread damage from overtightening or leakage from looseness; also inspect ignition coil boot condition.