斯巴鲁翼豹傲虎 22401-AA720 铱金火花塞 SILFR6A-11 火嘴替换

Is your Subaru Impreza or Outback experiencing rough idle, weak acceleration, cold-start difficulties, or noticeably higher fuel consumption? These symptoms typically indicate worn spark plug electrodes or heavy carbon buildup, leading to unstable ignition. Normal operation relies on spark plugs to ignite the air-fuel mixture for smooth power delivery. This product OEM number is 22401-AA720 / SILFR6A-11, suitable for Subaru Impreza, Outback, Legacy from 2000-2010. Use a torque wrench to tighten to the specified torque (about 20-25 Nm) to avoid overtightening and damaging cylinder head threads or under-tightening leading to leaks.