NGK Spark Plugs LFR5A-11 4-Pack — Stock #6376, Standard Heat Range for 4-Cylinder Engines

NGK LFR5A-11 spark plugs (4-pack, Stock #6376) are replacement ignition plugs designed to restore consistent engine firing and efficient combustion for compatible vehicles.

These NGK LFR5A-11 plugs are supplied in a pack of four, matching common service intervals for many four-cylinder engines and making it simple to replace all plugs at once. NGK is a long-standing brand in ignition components, and this specific heat range and electrode design suit a range of gasoline engines that specify the LFR5A-11 part number.

Which vehicles and applications use NGK LFR5A-11?

The LFR5A-11 designation corresponds to a particular thread size, reach, heat range and electrode gap suited to specific engines. Many older or OEM applications call for this exact plug; always check your vehicle’s owner manual or parts database to confirm fitment.

• Commonly used in small to mid-size gasoline engines with compatible thread and reach.
• Sold as a 4-pack, ideal for four-cylinder engines requiring full-plug replacement.
• Cross-reference Stock #6376 or LFR5A-11 in parts catalogs for exact matches.

How do these spark plugs affect engine performance?

Properly matched spark plugs help maintain reliable ignition timing and complete combustion, which supports smooth running and steady throttle response. Replacing worn plugs with the correct NGK LFR5A-11 units can reduce misfires and restore consistent starting behavior.

• Restores proper spark delivery when installed with recommended gap settings.
• Helps reduce rough idle and missed firing caused by aged plugs.
• Consistent electrode geometry for predictable ignition characteristics.

What should I know about installation and maintenance?

Install the plugs with the torque and gap specifications recommended by the vehicle maker; overtightening can damage threads while undertightening risks poor heat transfer. Inspect ignition boots and wires at the same time, and replace any worn components to ensure the new plugs perform as intended.

• Torque to the vehicle manufacturer’s specification—use a torque wrench.
• Check and set electrode gap if required before installation.
• Replace boots, wires, or coil packs if showing wear or corrosion.

Are these genuine NGK parts and what’s included?

This listing is for authentic NGK LFR5A-11 spark plugs supplied in a pack of four (Stock #6376). The package contains four individual plugs and is intended for customers replacing all plugs at once or stocking spares for routine service.

• Includes four NGK LFR5A-11 spark plugs per pack.
• Pack quantity aligns with common four-cylinder engine service needs.
• Buy multiple packs if replacing plugs on engines with different cylinder counts.

Who is this for? The NGK LFR5A-11 4-pack is aimed at DIY mechanics, professional technicians and vehicle owners who need a direct-replacement spark plug specified by their engine manufacturer. It's appropriate for anyone performing a scheduled tune-up on compatible vehicles who wants an authentic OEM-style component to restore ignition reliability.