{"id":17846,"date":"2025-05-28T12:46:59","date_gmt":"2025-05-28T09:46:59","guid":{"rendered":"https:\/\/www.mwsteel.eu\/?post_type=product&#038;p=17846"},"modified":"2026-09-18T13:52:25","modified_gmt":"2026-09-18T10:52:25","slug":"hks-spark-plugs-m40-xl-m45-xl","status":"publish","type":"product","link":"https:\/\/www.mwsteel.eu\/en\/product\/hks-spark-plugs-m40-xl-m45-xl\/","title":{"rendered":"HKS Spark Plugs M40-XL, M45-XL"},"content":{"rendered":"<p>We have the full selection of HKS Super Fire Racing spark plugs for race and tuning applications, featuring reinforced ignition capabilities, durability and anti-insulation.<\/p>\n<p>The heat ranges are designed to withstand high temperatures and pressures under racing conditions.<\/p>\n<p>The thermal edge of the ceramic insulator discharges to help decrease carbon deposits under long idling.<\/p>\n<p>Their iridium alloy center electrode reduces voltage requirements and improves ignition performance and durability.<\/p>\n<p>Notable engine applications include:<\/p>\n<p>Mitsubishi Lancer Evo X (4B11T engine): Both M40XL and M45XL are popular choices for this engine, depending on the level of tune<\/p>\n<p>Mercedes-Benz AMG 5.5L Bi-Turbo engines<\/p>\n<p>Certain Mini Cooper models (especially with the N12\/N14\/N18 engines, although specific fitment varies by year and engine code)<\/p>\n<p>Certain Kia\/Hyundai platforms (e.g., some 2.0T, 2.5T, and 1.6T engines).<\/p>\n<p>The chart below illustrates the respective Denso and NGK heat range indexes.<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-17801\" src=\"https:\/\/www.mwsteel.eu\/wp-content\/uploads\/2025\/05\/HKS-lampoarvotaulukko-325x57.jpg\" alt=\"\" width=\"530\" height=\"93\" srcset=\"https:\/\/www.mwsteel.eu\/wp-content\/uploads\/2025\/05\/HKS-lampoarvotaulukko-325x57.jpg 325w, https:\/\/www.mwsteel.eu\/wp-content\/uploads\/2025\/05\/HKS-lampoarvotaulukko-600x104.jpg 600w, https:\/\/www.mwsteel.eu\/wp-content\/uploads\/2025\/05\/HKS-lampoarvotaulukko.jpg 707w\" sizes=\"(max-width: 530px) 100vw, 530px\" \/><\/p>\n<p>Choose the best option from the drop down menu.<\/p>\n","protected":false},"excerpt":{"rendered":"<h4>Technical specifications<\/h4>\n<ul>\n<li>The HKS M-XL series spark plugs feature a narrow Long Reach M12 x 26,5 thread and a plug wrench size 16 mm \/ 5\/8&quot;<\/li>\n<li>Some Subaru and Honda applications, particularly those requiring a 12mm thread with a long reach.<\/li>\n<li><strong>Two heat ranges are offered:<\/strong> 40 (NGK 8) and 45 (NGK 9).<\/li>\n<\/ul>\n","protected":false},"featured_media":17804,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[1046],"product_tag":[],"class_list":["post-17846","product","type-product","status-publish","has-post-thumbnail","product_cat-spark-plugs","pa_tuotteet-hks-en","first","instock","taxable","shipping-taxable","purchasable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/product\/17846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/comments?post=17846"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/media\/17804"}],"wp:attachment":[{"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/media?parent=17846"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/product_brand?post=17846"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/product_cat?post=17846"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/product_tag?post=17846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}