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

Stock up for routine service with the NGK LFR6A-11 standard spark plug in a 24 pack. NGK standard plugs are chosen by more automotive, motorcycle, and marine engine manufacturers than any other, using a proven copper core and an electrode design built to support fast starts, consistent combustion, and long service life. This larger pack is a smart fit for multi-cylinder engines, shop inventory, or anyone maintaining multiple machines.

Key Features

• Plug Number: LFR6A-11
• NGK Part Number: 3672
• Pack Size: 24
• Unique copper core and electrode design for fast starts, peak 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 directly influence how cleanly an engine runs. Replacing worn plugs can help maintain smooth idle, reliable starting, and consistent acceleration. Fresh plugs also support efficient combustion, which can reduce misfires and help keep performance steady over time.

FAQs

• Is this a 24 pack?
  Yes. This listing is for a 24 pack of NGK LFR6A-11 (3672) spark plugs.
• What is the part number?
  The NGK part number is 3672, and the plug number is LFR6A-11.
• How do I confirm this is the correct plug?
  Match your existing plug number and confirm application using your engine manual or parts lookup before ordering.
• Should I replace plugs as a complete set?
  Many engines run best when plugs are replaced as a full set. Follow your manufacturer’s service guidance for quantity and replacement interval.