{"product_id":"ngk-spark-plugs-lfr5a-11-4-pack-stock-6376-standard-heat-range-for-4-cylinder-engines","title":"NGK Spark Plugs LFR5A-11 4-Pack — Stock #6376, Standard Heat Range for 4-Cylinder Engines","description":"\u003cp\u003e\u003cstrong\u003eNGK LFR5A-11 spark plugs (4-pack, Stock #6376) are replacement ignition plugs designed to restore consistent engine firing and efficient combustion for compatible vehicles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese 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.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles and applications use NGK LFR5A-11?\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommonly used in small to mid-size gasoline engines with compatible thread and reach.\u003c\/li\u003e\n  \u003cli\u003eSold as a 4-pack, ideal for four-cylinder engines requiring full-plug replacement.\u003c\/li\u003e\n  \u003cli\u003eCross-reference Stock #6376 or LFR5A-11 in parts catalogs for exact matches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these spark plugs affect engine performance?\u003c\/h3\u003e\n\u003cp\u003eProperly 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores proper spark delivery when installed with recommended gap settings.\u003c\/li\u003e\n  \u003cli\u003eHelps reduce rough idle and missed firing caused by aged plugs.\u003c\/li\u003e\n  \u003cli\u003eConsistent electrode geometry for predictable ignition characteristics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I know about installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eInstall 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTorque to the vehicle manufacturer’s specification—use a torque wrench.\u003c\/li\u003e\n  \u003cli\u003eCheck and set electrode gap if required before installation.\u003c\/li\u003e\n  \u003cli\u003eReplace boots, wires, or coil packs if showing wear or corrosion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these genuine NGK parts and what’s included?\u003c\/h3\u003e\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes four NGK LFR5A-11 spark plugs per pack.\u003c\/li\u003e\n  \u003cli\u003ePack quantity aligns with common four-cylinder engine service needs.\u003c\/li\u003e\n  \u003cli\u003eBuy multiple packs if replacing plugs on engines with different cylinder counts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho is this for?\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this pack the correct size for a four-cylinder engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — this listing includes four NGK LFR5A-11 plugs, ideal for replacing all spark plugs on most four-cylinder engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these plugs come pre-gapped?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: NGK plugs are often pre-gapped close to specifications but you should verify and adjust the gap to your vehicle manufacturer's setting before installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48086268018846,"sku":"B0724ZC8C5","price":46.01,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-lfr5a-11-front-packaging_1a7725aa-b20e-4420-b142-a60fc7957983.jpg?v=1785892947","url":"https:\/\/northtrailauto.ca\/products\/ngk-spark-plugs-lfr5a-11-4-pack-stock-6376-standard-heat-range-for-4-cylinder-engines","provider":"North Trail Auto","version":"1.0","type":"link"}