{"product_id":"sykrss-iridium-spark-plugs-set-of-6-for-3-5l-v6-ford-ltr6ix11-oem-fit-long-life-iridium-tips","title":"SYKRSS Iridium Spark Plugs Set of 6 for 3.5L V6 Ford (LTR6IX11) — OEM Fit, Long-Life Iridium Tips","description":"\u003cp\u003e\u003cstrong\u003eSYKRSS Iridium Spark Plugs 6509 (LTR6IX11) are a six-pack replacement designed to match OEM fit and deliver consistent ignition performance for 3.5L V6 Ford engines from 2011–2020 and other compatible models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese SYKRSS plugs combine an iridium firing tip, copper core and ceramic insulator to provide a long-lived replacement that meets OE dimensions and electrical characteristics. Built and tested to address common ignition issues, the 6509 (LTR6IX11) plugs are made as direct-fit replacements for vehicles such as Ford Explorer (2011–2020), Mustang (2011–2017), Flex (2012–2019), F-150 (2011–2021) and select Taurus models. The set contains six plugs plus a user guide and is backed by SYKRSS customer support.\u003c\/p\u003e\n\n\u003ch3\u003eWill these spark plugs fit my 3.5L V6 Ford engine?\u003c\/h3\u003e\n\n\u003cp\u003eYes — the SYKRSS 6509 (LTR6IX11) is made to match OEM specifications for many 3.5L V6 Ford engines. Confirm compatibility by matching the part number and engine year range before ordering.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eOEM cross-reference: LTR6IX11 \/ XP5263 \/ 6509.\u003c\/li\u003e\n  \u003cli\u003eDesigned for Ford Explorer 2011–2020 3.5L V6 (naturally aspirated and turbocharged where applicable).\u003c\/li\u003e\n  \u003cli\u003eAlso fits compatible Mustang, Flex, F-150, Taurus and other models — check your vehicle’s service manual or the product detail page.\u003c\/li\u003e\n  \u003cli\u003eAlways verify cylinder head thread size and reach to avoid fitment issues.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these iridium plugs affect starting and throttle response?\u003c\/h3\u003e\n\n\u003cp\u003eIridium tips provide a small, durable electrode that requires less voltage to produce a strong spark, which helps with consistent ignition across operating conditions. That can translate into more reliable cold starts and stable throttle transitions, especially on engines that have worn or fouled original plugs.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIridium tip reduces electrode wear for longer service life.\u003c\/li\u003e\n  \u003cli\u003eCopper core improves heat transfer and stable voltage performance.\u003c\/li\u003e\n  \u003cli\u003eCeramic insulator preserves spark isolation and reduces misfires.\u003c\/li\u003e\n  \u003cli\u003eManufacturing tests help ensure reliable coil output and spark consistency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat problems can these plugs help address?\u003c\/h3\u003e\n\n\u003cp\u003eWorn or failing spark plugs can cause misfires, rough idle, sluggish acceleration, and reduced fuel efficiency. The SYKRSS iridium plugs are engineered to meet strict quality checks to help restore consistent combustion and reduce common ignition-related symptoms.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eReduces misfires and unstable idling when plug wear is a factor.\u003c\/li\u003e\n  \u003cli\u003eHelps improve ignition reliability across the RPM range.\u003c\/li\u003e\n  \u003cli\u003eMay contribute to smoother acceleration and steadier fuel burn.\u003c\/li\u003e\n  \u003cli\u003eTested to minimize premature fouling and inconsistent coil performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the box and how long can I expect them to last?\u003c\/h3\u003e\n\n\u003cp\u003eThe package includes six SYKRSS spark plugs and a user manual. Lifespan depends on driving style and conditions, but iridium-equipped plugs generally outlast standard copper or nickel-plated plugs under normal use.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIncluded: 6 spark plugs and one manual.\u003c\/li\u003e\n  \u003cli\u003eConstruction: iridium tip, copper core, ceramic insulator for longevity.\u003c\/li\u003e\n  \u003cli\u003eDurability: iridium electrodes resist wear longer than conventional tips.\u003c\/li\u003e\n  \u003cli\u003eSupport: SYKRSS customer service and a one-year satisfaction window.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers or technicians who need a direct-fit, long-lasting replacement for Ford 3.5L V6 engines and compatible models, and who want plugs built to OE dimensions with improved electrode life. Choose SYKRSS if you’re replacing a full set and want consistent ignition performance with a product that’s tested for common ignition issues and backed by manufacturer support.\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: Are these SYKRSS plugs compatible with Ford F-150 3.5L engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the SYKRSS 6509 (LTR6IX11) is compatible with many Ford F-150 3.5L applications; confirm with your model year and engine specs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these plugs include installation gaskets or anti-seize?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The package contains six plugs and a manual; installation accessories like anti-seize are not included.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SYKRSS","offers":[{"title":"Default Title","offer_id":48087667212446,"sku":"B0D4PY5M4F","price":36.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/sykrss-front-packaging_72c1caed-12ec-4f95-b87f-b64cbaefd830.jpg?v=1785928115","url":"https:\/\/northtrailauto.ca\/products\/sykrss-iridium-spark-plugs-set-of-6-for-3-5l-v6-ford-ltr6ix11-oem-fit-long-life-iridium-tips","provider":"North Trail Auto","version":"1.0","type":"link"}