{"product_id":"ngk-dpr6ea-9-spark-plugs-set-of-4-nickel-copper-oe-style-0-036-in-gap-5000ω-resistor","title":"NGK DPR6EA-9 Spark Plugs Set of 4 — Nickel\/Copper OE-Style, 0.036 in Gap, 5000Ω Resistor","description":"\u003cp\u003e\u003cstrong\u003eThe NGK DPR6EA-9 is a four-pack of OE-style nickel\/copper spark plugs engineered for reliable ignition performance in compatible Kawasaki and Triumph V‑twin and cruiser engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese DPR6EA-9 (part number 5531) spark plugs combine a copper core with nickel alloy tips and a 5,000‑ohm resistor to deliver consistent, OEM-grade conductivity and suppression of electrical interference. Built with a high‑grade alumina-silicate ceramic insulator, triple gasket sealing, and a crush washer seat, they’re intended as direct replacement plugs for many Kawasaki Vulcan and several Triumph Thunderbird models requiring a 0.036 in (0.9 mm) gap and 0.750 in (19 mm) reach.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and models are these NGK DPR6EA-9 plugs compatible with?\u003c\/h3\u003e\n\u003cp\u003eThese plugs match a range of Kawasaki 1471cc Vulcan 1500 variants (including Classic, Drifter, Nomad FI, Mean Streak, and related OE numbers) produced around 1999–2008, and several Triumph Thunderbird models from 2010–2017 with 1597–1700cc engines. Always confirm fitment with your vehicle’s manual or parts database before installing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eKawasaki VN1500E\/ J\/R\/L\/N\/P models (Vulcan 1500 series) listed in product compatibility.\u003c\/li\u003e\n  \u003cli\u003eTriumph Thunderbird family (including Thunderbird Storm, Commander, LT, Nightstorm SE) model years noted above.\u003c\/li\u003e\n  \u003cli\u003eRequired gap: 0.036 in (0.9 mm); thread diameter: 12.0 mm; reach: 19.0 mm (0.750 in).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key construction and electrical features of these plugs?\u003c\/h3\u003e\n\u003cp\u003eThe DPR6EA-9 uses a solid copper core for heat transfer and conductivity, a nickel alloy center electrode tip, and a single nickel ground electrode in a J-gap arrangement. The 5,000‑ohm resistor helps suppress radio-frequency interference while the ceramic insulator and multiple gaskets protect against combustion leakage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCenter electrode: copper core with nickel tip; ground electrode: nickel.\u003c\/li\u003e\n  \u003cli\u003eResistor type: yes — 5000 ohms to reduce EMI\/RFI interference.\u003c\/li\u003e\n  \u003cli\u003eInsulator: high‑grade alumina silicate ceramic; triple gasket sealing and crush washer seat.\u003c\/li\u003e\n  \u003cli\u003eHex size: 18 mm; insulator height: 50.0 mm; pre‑gap: 0.036 in (0.9 mm).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these plugs compare to precious-metal or long‑life alternatives?\u003c\/h3\u003e\n\u003cp\u003eNGK DPR6EA-9 plugs are standard nickel‑alloy replacements designed to match original equipment nickel plugs. They offer dependable performance at a lower cost than iridium or platinum plugs, but they do not provide the extended service life or high‑temperature wear resistance of precious‑metal types.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBest when replacing factory nickel alloy plugs in compatible engines.\u003c\/li\u003e\n  \u003cli\u003eNot recommended to substitute where factory precious‑metal plugs were installed.\u003c\/li\u003e\n  \u003cli\u003eIdeal for owners seeking OEM-style performance and straightforward service intervals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Motorcyclists and mechanics looking for OEM-equivalent replacement spark plugs for select Kawasaki Vulcan 1500 and Triumph Thunderbird variants will find the NGK DPR6EA-9 set an economical, trustworthy option. If your bike’s factory specification calls for nickel alloy plugs with a 0.036 in gap and a 19 mm reach, this four-pack delivers standard-replacement construction, EMI suppression, and the physical dimensions necessary for a direct fit. Always verify part number 5531 (DPR6EA-9) against your motorcycle’s recommended part list or owner’s manual before purchase or installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eFeatures summary:\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePack of 4 NGK DPR6EA-9 spark plugs (part #5531)\u003c\/li\u003e\n  \u003cli\u003eNickel\/copper construction, 5000 ohm resistor, ceramic insulator\u003c\/li\u003e\n  \u003cli\u003ePre‑gap 0.036 in (0.9 mm), reach 0.750 in (19.0 mm), thread 12.0 mm\u003c\/li\u003e\n  \u003cli\u003eFlat seat with crush washer; hex 18 mm; manufacturer heat range 6\u003c\/li\u003e\n\u003c\/ul\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: Can DPR6EA-9 plugs be used in engines that originally had platinum or iridium plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These are nickel alloy standard‑replacement plugs and aren’t recommended where the factory specified precious‑metal plugs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What gap should I set for NGK DPR6EA-9 plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The factory pre‑gap is 0.036 in (0.9 mm); verify and re‑gap only if your engine’s service manual requires a different specification.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48084435828894,"sku":"B00M5EVA9E","price":31.25,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-dpr6ea-9-front-packaging.jpg?v=1785855196","url":"https:\/\/northtrailauto.ca\/products\/ngk-dpr6ea-9-spark-plugs-set-of-4-nickel-copper-oe-style-0-036-in-gap-5000%cf%89-resistor","provider":"North Trail Auto","version":"1.0","type":"link"}