{"product_id":"denso-iridium-tt-spark-plugs-ikh16tt-4-pack-0-4mm-iridium-center-twin-tip-for-better-ignition-and-longevity","title":"Denso Iridium TT Spark Plugs IKH16TT 4-Pack — 0.4mm Iridium Center, Twin‑Tip for Better Ignition and Longevity","description":"\u003cp\u003e\u003cstrong\u003eDenso IKH16TT Iridium TT spark plugs are high-performance, long-life ignition plugs built with a 0.4mm iridium center electrode and Twin‑Tip design for better ignitability, fuel economy, and durability.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese IKH16TT plugs combine Denso’s iridium and platinum materials with a 360-degree laser‑welded construction to deliver an extended service life and consistent spark performance. Engineered to minimize electrode interference and maximize spark concentration, the Twin‑Tip (TT) configuration helps engines start quicker and run cleaner under a wide range of driving conditions. Each 4703-4 PK set includes four pre-fired, machine‑threaded plugs ready for reliable installation.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these plugs enhance ignition performance?\u003c\/h3\u003e\n\u003cp\u003eDenso Iridium TT plugs concentrate spark energy on a fine iridium center electrode and a needle‑thin ground electrode to create a more focused, reliable spark. This design improves the plug’s ability to ignite the air–fuel mixture more consistently across rpm ranges, which supports smoother throttle response and steadier combustion.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e0.4mm iridium center electrode for precise spark formation\u003c\/li\u003e\n  \u003cli\u003e0.7mm needle tip ground electrode reduces spark energy loss\u003c\/li\u003e\n  \u003cli\u003eTwin‑Tip design focuses the spark and reduces misfires\u003c\/li\u003e\n  \u003cli\u003e360° laser welding ensures a secure electrode bond\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these plugs last longer than standard spark plugs?\u003c\/h3\u003e\n\u003cp\u003eYes — Denso’s patented iridium alloy and the durable laser‑weld process extend service life well beyond conventional plugs. The materials and construction are selected to resist wear, helping the plugs maintain consistent gap and performance for many miles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh‑concentration iridium alloy for superior electrode wear resistance\u003c\/li\u003e\n  \u003cli\u003ePlatinum elements add stability under high heat\u003c\/li\u003e\n  \u003cli\u003ePre‑fired quality control reduces early failures\u003c\/li\u003e\n  \u003cli\u003eDesigned for service life exceeding 100,000 miles under normal conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation and reliability features should I expect?\u003c\/h3\u003e\n\u003cp\u003eDenso builds these plugs with installer‑friendly and engine‑safe features to minimize problems during service. Machine‑rolled threads and a copper‑glass seal improve fit, prevent seizing, and keep combustion gases contained around the insulator.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMachine‑rolled threads to prevent cross‑threading and seizure\u003c\/li\u003e\n  \u003cli\u003eCopper‑glass seal for a gas‑tight bond between electrode and insulator\u003c\/li\u003e\n  \u003cli\u003ePurified alumina insulator for strength and thermal conductivity\u003c\/li\u003e\n  \u003cli\u003eFive‑rib insulator design to prevent flashover and improve reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will these plugs impact everyday driving and fuel economy?\u003c\/h3\u003e\n\u003cp\u003eBy improving ignitability and promoting more complete combustion, Iridium TT plugs can help engines run more efficiently and respond better to throttle inputs. While actual fuel savings depend on driving habits and vehicle condition, many drivers notice smoother acceleration and steadier idling after installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eImproved ignitability can reduce incomplete combustion events\u003c\/li\u003e\n  \u003cli\u003eSmoother power delivery and faster throttle response\u003c\/li\u003e\n  \u003cli\u003eConsistent spark reduces rough idling and hesitation\u003c\/li\u003e\n  \u003cli\u003eLonger service intervals compared with conventional plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers and technicians who want a high‑durability, performance‑oriented replacement spark plug that balances longevity with improved ignition. Ideal for modern gasoline engines where stable, concentrated spark and long intervals between changes are priorities — especially for owners seeking reduced maintenance frequency and predictable engine response.\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 Denso IKH16TT plugs compatible with my car?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your vehicle's owner's manual or parts lookup for IKH16TT fitment; compatibility depends on engine and manufacturer specifications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace Denso Iridium TT plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Under normal driving, these plugs are rated for extended life—commonly up to 100,000 miles—but follow your vehicle manufacturer’s recommended interval.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Denso","offers":[{"title":"Default Title","offer_id":48082908184734,"sku":"B071FR51VC","price":63.43,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/denso-ikh16tt-front-packaging.jpg?v=1785819208","url":"https:\/\/northtrailauto.ca\/products\/denso-iridium-tt-spark-plugs-ikh16tt-4-pack-0-4mm-iridium-center-twin-tip-for-better-ignition-and-longevity","provider":"North Trail Auto","version":"1.0","type":"link"}