{"id":17913,"date":"2025-05-28T20:24:38","date_gmt":"2025-05-28T17:24:38","guid":{"rendered":"https:\/\/www.mwsteel.eu\/?post_type=product&#038;p=17913"},"modified":"2026-09-18T13:52:40","modified_gmt":"2026-09-18T10:52:40","slug":"hks-spark-plugs-rutenium-mr40-xlz-mr45-xlz-mr45-hlz","status":"publish","type":"product","link":"https:\/\/www.mwsteel.eu\/en\/product\/hks-spark-plugs-rutenium-mr40-xlz-mr45-xlz-mr45-hlz\/","title":{"rendered":"HKS Spark Plugs Ruthenium MR40-XLZ, MR45-XLZ, MR45-HLZ"},"content":{"rendered":"<p>We offer a full selection of HKS Super Fire Racing family of spark plugs optimized for race and tuning applications, featuring reinforced ignition capabilities, durability and anti-insulation.<\/p>\n<p>The thermal edge of the ceramic insulator discharges to help decrease carbon deposits under long idling.<\/p>\n<p>Heat ranges are designed to withstand high temperatures and pressures under demanding race conditions.<\/p>\n<p>The HKS MR40-XLZ, MR45-XLZ and MR45-HLZ spark plugs are part of the newer HKS &quot;MR Series&quot; of Super Fire Racing plugs.<\/p>\n<p>The &quot;MR&quot; specifically highlights that these plugs incorporate a Ruthenium Alloy Electrode for enhanced performance and longevity.<\/p>\n<p>These plugs are designed for modern performance cars that utilize the M12 thread and long reach, particularly those where a protruding electrode offers benefits.<\/p>\n<p>MR40\/45-XLZ: Suzuki Swift Sport (ZC33S)<\/p>\n<p>MR45-HLZ: Honda Civic Type R (FK8\/FL5) , Toyota GR Yaris, Subaru BRZ \/ Toyota 86 (FA20\/FA24) applications, especially for tuned setups.<\/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=\"519\" height=\"91\" 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: 519px) 100vw, 519px\" \/><\/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>They have a Long Reach M12 x 26,5 thread and a wrench size 14 mm \/ 35\/64&quot; (HLZ) or 16 mm \/ 5\/8&quot; (XLZ), and their firing point protrudes 2 mm \/ 5\/64&quot;.<\/li>\n<li><strong>MR-XLZ -series offers two heat ranges:<\/strong> 40 (NGK 8) and 45 (NGK 9)<\/li>\n<li>MR-HLZ -model heat range is 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-17913","product","type-product","status-publish","has-post-thumbnail","product_cat-spark-plugs","pa_tuotteet-hks-en","first","onbackorder","taxable","shipping-taxable","purchasable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/product\/17913","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=17913"}],"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=17913"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/product_brand?post=17913"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/product_cat?post=17913"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.mwsteel.eu\/en\/wp-json\/wp\/v2\/product_tag?post=17913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}