NGK - Standard Spark Plug - LFR6A-11 (3672) - 12 Pack

Handle your next tune-up with confidence using the NGK LFR6A-11 standard spark plug in a 12 pack. NGK standard plugs are selected by more automotive, motorcycle, and marine engine manufacturers than any other. A proven copper core and precision electrode design help support fast starts, steady ignition performance, and dependable service life.

This 12 pack is ideal for multi-cylinder engines or keeping extras on hand so you are ready when routine maintenance comes due.

Key Features

• Plug Number: LFR6A-11
• NGK Part Number: 3672
• Pack Size: 12
• Unique copper core and electrode design for fast starts, strong performance, and long life
• Triple gasket sealing process helps eliminate gas leakage past the shell
• 99% highly pure alumina silicate insulator for strength and heat resistance
• Solid copper core supports efficient heat transfer and durability
• Corrugated ribs help prevent flash over
• Cold rolled threads help prevent damage to the cylinder head during installation

Why Replace Spark Plugs on Schedule

Spark plugs play a direct role in combustion efficiency. Replacing worn plugs can help maintain smooth idle, reliable starting, and consistent throttle response. Fresh plugs also support cleaner combustion and reduce the risk of misfires caused by excessive gap or worn electrodes.

FAQs

• Is this a 12 pack?
  Yes. This listing includes 12 NGK LFR6A-11 (3672) spark plugs.
• What is the NGK part number?
  The NGK part number is 3672.
• How do I confirm this is the correct plug?
  Match your current plug number and confirm application using your engine manual or parts lookup before ordering.
• Should spark plugs be replaced as a complete set?
  Most engines perform best when all plugs are replaced at the same time. Follow your manufacturer’s service schedule for proper interval and quantity.