{"product_id":"kacuyelin-ignition-coil-pack-iridium-spark-plugs-set-of-4-direct-fit-for-1-8l-1999-2008-toyota-gm-oe-spec-durability","title":"KacuYelin Ignition Coil Pack \u0026 Iridium Spark Plugs Set of 4 — Direct-Fit for 1.8L (1999–2008) Toyota\/GM, OE‑Spec Durability","description":"\u003cp\u003e\u003cstrong\u003eKacuYelin UF247 kit is a plug-and-play set of four ignition coils and four iridium spark plugs engineered to restore reliable spark and optimize combustion for 1.8L Toyota, Chevrolet Prizm and Pontiac Vibe engines (1999–2008).\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis complete ignition kit matches OE dimensions and electrical specs for a direct replacement of part numbers such as 5C1074 and 4503. The coils are built with high‑purity copper windings, silicon steel cores and heat‑resistant epoxy to sustain stable high‑voltage output, while the iridium plugs use 360° laser welding and high‑alumina ceramic to deliver focused sparks and long service life. Together they aim to improve throttle response, reduce misfires, and help normalize fuel economy when fitted correctly to compatible 1.8L L4 models.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this kit affect starting and misfire issues?\u003c\/h3\u003e\n\u003cp\u003eReplacing worn coils and degraded spark plugs often clears intermittent misfires and weak starts. The coils’ corrosion‑resistant construction helps maintain high voltage delivery, and the iridium tips resist erosion so spark intensity remains consistent over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect fit for specified 1.8L engines—no modification needed.\u003c\/li\u003e\n  \u003cli\u003eImproved spark consistency reduces hesitation during cold starts.\u003c\/li\u003e\n  \u003cli\u003eHigh‑temperature materials lower risk of coil breakdown under load.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these parts improve fuel economy or performance?\u003c\/h3\u003e\n\u003cp\u003eWhen ignition components are operating properly, combustion becomes more complete, which can translate to steadier throttle response and more consistent fuel burn. The manufacturer reports potential fuel efficiency improvements when replacing failing coils and plugs, though results vary with vehicle condition and driving habits.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium electrode produces focused sparks that assist complete combustion.\u003c\/li\u003e\n  \u003cli\u003eReduced carbon deposits and stable firing can help MPG stability.\u003c\/li\u003e\n  \u003cli\u003eOptimized ignition timing compatibility with OEM specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these coils and plugs easy to install by a DIYer?\u003c\/h3\u003e\n\u003cp\u003eYes—this set is designed as a direct OEM replacement for compatible models and aligns with original mounting points and electrical connectors. Basic hand tools and adherence to torque specs are all that’s normally required; always disconnect the battery and follow vehicle service instructions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePlug-and-play coil connectors and factory-length spark plugs included.\u003c\/li\u003e\n  \u003cli\u003eWorks with Toyota Celica, Corolla, Matrix and GM Prizm\/Vibe 1.8L models listed.\u003c\/li\u003e\n  \u003cli\u003eManufacturer advises confirming year, model and engine size before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow long should these ignition parts last and what maintenance is recommended?\u003c\/h3\u003e\n\u003cp\u003eIridium spark plugs in this set are manufactured with high nickel content and robust ceramics for extended life; typical longevity ranges widely depending on use, but they are built for long service intervals. Coils constructed with quality windings and resin encapsulation are intended to resist heat and oxidation, but inspection during routine tune‑ups is advised.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium plugs engineered for long wear and resistance to ablation.\u003c\/li\u003e\n  \u003cli\u003eCoil materials resist oxidation to maintain stable high voltage output.\u003c\/li\u003e\n  \u003cli\u003eCheck plug gap and coil boot condition at regular service intervals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Drivers and DIY mechanics who own Toyota Celica, Corolla, Matrix or GM Prizm\/Vibe 1.8L vehicles from 1999 to 2008 and who want a matched set of coils and long‑life iridium spark plugs for dependable ignition performance. It’s aimed at people seeking an OEM‑spec replacement that’s manufactured in TS16949 certified facilities, ready for straightforward installation, and intended to reduce common ignition‑related drivability issues when fitted to the correct engine and model year.\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: Does this kit fit my 2004 Toyota Corolla 1.8L?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, this UF247 kit is compatible with Toyota Corolla 1.8L models from 1999–2008; confirm year and engine size before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace the iridium plugs in this set?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Iridium plugs are long‑life; typical intervals range widely, but inspect during regular tune‑ups and consider replacement between 60,000–100,000 miles depending on conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KacuYelin","offers":[{"title":"Default Title","offer_id":67585908310201,"sku":"B0F1FPSS62","price":133.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/kacuyelin-coil-pack-front-view_e8589068-fb74-4405-9231-0a4494026bf3.jpg?v=1790479761","url":"https:\/\/redleafauto.ca\/products\/kacuyelin-ignition-coil-pack-iridium-spark-plugs-set-of-4-direct-fit-for-1-8l-1999-2008-toyota-gm-oe-spec-durability","provider":"Redleaf Auto","version":"1.0","type":"link"}