NGK Spark Plugs FR5 8-Pack — OEM Replacement Bulk-Packed, Cold-Medium Heat Range

NGK FR5 spark plugs (8-pack, stock #7373) are genuine OEM replacement ignition plugs supplied in bulk for compatible cars and small engines.

These FR5 spark plugs from NGK arrive new and bulk-packed to provide a straightforward, cost-effective option when you need multiple replacements. They match OEM specifications and are supplied under NGK part references, so cross-reference your vehicle’s service manual or the compatibility list to confirm fitment. This listing includes eight FR5 plugs and several cross-reference numbers to help you identify correct applications.

Which engines and models accept the NGK FR5 plug?

The FR5 is a common NGK cold-to-medium heat-range plug used across many small engines, scooters, and older automotive applications. Compatibility is best verified by comparing the plug code or OEM number in your owner’s manual with the listed cross-references below.

• Cross-reference identifiers include: 41-602, 41800, AC5, 784, 3924, AR3924 and more.
• Also shown as K20PR-U, K20PRU, K20TT, VK20 in some catalogs.
• Stock/part number for this listing: NGK STK 7373 (FR5-8PK).

How should I install the FR5 plugs and what torque is recommended?

Installation should follow your vehicle or engine manufacturer’s service instructions to ensure proper seating and gap. Use a torque wrench or a calibrated torque setting on a ratchet adapter to avoid over-tightening and to protect the cylinder head threads.

• Always check and set the spark plug gap per your owner’s manual before installation.
• Finger-start each plug, then tighten to the manufacturer-specified torque.
• Replace one plug at a time to preserve engine timing and firing order.

What does “bulk packed” mean for this 8-pack purchase?

Bulk packed indicates the eight plugs are packaged together without individual retail boxes, which reduces packaging waste and keeps unit cost lower. Each plug is new and genuine NGK product; bulk packaging does not affect part authenticity or fitment.

• All plugs in this pack are new, genuine NGK FR5 items.
• Packaging is consolidated to ship all eight plugs together efficiently.
• Perfect for multi-cylinder engines or stocking spares for future service.

How do I confirm this NGK FR5 matches my existing plugs?

Compare the stamped part code on your current plugs or consult your vehicle’s parts list. Use any of the cross-reference numbers provided in the product details to match OEM part numbers used by different manufacturers.

• Check codes printed on current plugs and the vehicle service manual.
• Refer to the compatibility list: e.g., RC14YC, DR14ZC, IK20 and related codes.
• If unsure, contact an authorized NGK dealer or provide your vehicle year/make/model for verification.

Who this is for: This 8-pack of NGK FR5 spark plugs is intended for mechanics, home DIYers, and fleet owners who need multiple genuine replacement plugs at once. It’s suitable for anyone maintaining compatible cars, motorcycles, scooters, lawn equipment, or other small engines that specify FR5 or any of the listed cross-reference numbers. Always verify fitment with your owner’s manual or parts diagram before ordering to ensure correct application and safe installation.