{"product_id":"mishimoto-performance-aluminum-radiator-for-2012-2015-honda-civic-si-mmrad-civ-12si","title":"Mishimoto Performance Aluminum Radiator for 2012-2015 Honda Civic SI (MMRAD-CIV-12SI)","description":"\u003cstyle\u003e\u003c!--\n.more-btn {\ntransition-duration: 0.4s;\nfont-size: 9pt;\nfont-weight:bold;\nborder:none;\ncursor:pointer;\nwidth:300px;\nheight:36px;\ncolor:white;\nbackground-color:#7C1010;\nborder-radius:14px;\n}\n.more-btn:hover {\ntext-decoration:underline;\n}\n--\u003e\u003c\/style\u003e\n\u003cdiv style=\"margin-left: auto; margin-right: auto; max-width: 1400px;\"\u003e\n\u003chr style=\"background-color: black; padding: 0; margin: 0px;\"\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"line-height: 18px; font-size: 11.5pt; font-family: 'Helvetica',sans-serif; color: black;\"\u003eUpgrade the cooling system of your 2012-2015 Honda Civic Si with this Mishimoto Performance Aluminum Radiator, built to manage the sustained thermal output of a high-revving K-series engine on the street and the track. All-aluminum construction with precision TIG-welded end tanks outlasts the factory plastic-tanked unit prone to cracking under heat cycling and repeated high-rpm use. A 63% increase in core volume over the OEM radiator delivers greater surface area and thermal capacity, keeping coolant temperatures stable during back-to-back pulls, spirited street sessions, and weekend track days where the stock radiator starts to fall behind. Designed as a direct-fit replacement for the 2012-2015 Honda Civic Si, this radiator drops in without cutting, fabricating, or modifications, and works seamlessly with all stock hoses and components without alteration. The included high-pressure radiator cap maintains optimal system pressure from the first drive, extracting the full benefit of the upgraded core. The Mishimoto Magnetic Drain Plug catches ferrous metallic debris before it circulates through the cooling system, protecting your K-series engine internals and extending service life beyond what the factory setup allows. Don't wait for your stock radiator to crack and leave you sidelined. Whether you daily drive your Civic Si, push it hard on weekend canyon runs, or are building toward a higher-output K-series setup, this aluminum radiator handles the sustained thermal demands your factory unit was never built for. Proactive cooling upgrades protect your engine investment - and this one is built to outlast it. Backed by the Mishimoto Lifetime Warranty, this Performance Aluminum Radiator is the last cooling upgrade your 2012-2015 Honda Civic Si will ever need.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr style=\"background-color: black; padding: 0; margin: 0px;\"\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Key Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cul style=\"line-height: 18px; font-size: 11.5pt; font-family: 'Helvetica',sans-serif; color: black;\"\u003e\n\u003cli\u003eBuilt for the high-rev demands of the Civic Si K-series — the oversized aluminum core absorbs sustained thermal output during back-to-back pulls, spirited street driving, and track sessions where the stock radiator begins to fall behind.\u003c\/li\u003e\n\u003cli\u003e63% more core volume over stock — the enlarged core delivers greater surface area and thermal capacity than the factory unit, running measurably cooler when the K-series is pushed hardest.\u003c\/li\u003e\n\u003cli\u003eAll-aluminum construction, no plastic to crack — full aluminum end tanks joined by precision TIG-welds replace the factory components that fail under heat cycling and sustained high-rpm use.\u003c\/li\u003e\n\u003cli\u003eMagnetic drain plug removes ferrous debris before it circulates — catches metallic particles from the cooling system to protect K-series engine internals and extend service life beyond the stock interval.\u003c\/li\u003e\n\u003cli\u003eIncluded high-pressure radiator cap maintains optimal system pressure — delivers enhanced cooling performance from the first drive without sourcing additional components.\u003c\/li\u003e\n\u003cli\u003eDrops in without modification — confirmed direct fit for the 2012-2015 Honda Civic Si, compatible with all stock hoses and components — no cutting, fabricating, or adapter work required.\u003c\/li\u003e\n\u003cli\u003eOwn it for life — backed by Mishimoto's Lifetime Warranty, your investment is protected long after install day.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr style=\"background-color: black; padding: 0; margin: 0px;\"\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003ctable style=\"width: 100%; table-layout: auto; line-height: 30px; font-size: 11.5pt; font-family: 'Helvetica',sans-serif; color: black;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand:\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/ja\/collections\/mishimoto\"\u003eMishimoto\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: lightgray;\"\u003e\n\u003ctd\u003eProduct Category:\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/ja\/collections\/cooling\"\u003eCooling\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type:\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/ja\/collections\/radiators\"\u003eRadiators\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: lightgray;\"\u003e\n\u003ctd\u003eUPC:\u003c\/td\u003e\n\u003ctd\u003e840197727058\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Length (IN):\u003c\/td\u003e\n\u003ctd\u003e27.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: lightgray;\"\u003e\n\u003ctd\u003eOverall Height (IN):\u003c\/td\u003e\n\u003ctd\u003e19.18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Width (IN):\u003c\/td\u003e\n\u003ctd\u003e5.22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: lightgray;\"\u003e\n\u003ctd\u003eCore Length (IN):\u003c\/td\u003e\n\u003ctd\u003e26.36\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Height (IN):\u003c\/td\u003e\n\u003ctd\u003e14.69\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: lightgray;\"\u003e\n\u003ctd\u003eCore Thickness (in):\u003c\/td\u003e\n\u003ctd\u003e1.02\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRows:\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: lightgray;\"\u003e\n\u003ctd\u003eInlet (IN):\u003c\/td\u003e\n\u003ctd\u003e1.26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutlet (IN):\u003c\/td\u003e\n\u003ctd\u003e1.26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: lightgray;\"\u003e\n\u003ctd\u003eDrain Plug Thread Size:\u003c\/td\u003e\n\u003ctd\u003eM12X1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Codes:\u003c\/td\u003e\n\u003ctd\u003eK24Z7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: lightgray;\"\u003e\n\u003ctd\u003eChassis Codes:\u003c\/td\u003e\n\u003ctd\u003eFG4,FB6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoolant Capacity:\u003c\/td\u003e\n\u003ctd\u003e0.69\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr style=\"background-color: black; padding: 0; margin: 0px;\"\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Included Items\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cul style=\"line-height: 24px; font-size: 11.5pt; font-family: 'Helvetica',sans-serif; color: black;\"\u003e\n\u003cli\u003eMishimoto Radiator\u003c\/li\u003e\n\u003cli\u003eMishimoto Radiator Cap\u003c\/li\u003e\n\u003cli\u003eMagnetic Drain Plug\u003c\/li\u003e\n\u003cli\u003eMishimoto Lifetime Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr style=\"background-color: black; padding: 0; margin: 0px;\"\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Documents\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\n\u003ca style=\"font-size: 11.5pt; font-family: 'Helvetica',sans-serif;\" href=\"https:\/\/www.mishimoto.com\/mwdownloads\/download\/link\/id\/2703\" title=\"Mishimoto Product Installation Guides\" target=\"_blank\"\u003eProduct Installation Guides\u003c\/a\u003e\n\u003cbr\u003e\n\u003ca style=\"font-size: 11.5pt; font-family: 'Helvetica',sans-serif;\" href=\"https:\/\/www.mishimoto.com\/lifetime-warranty\" title=\"Mishimoto Product Warranty\" target=\"_blank\"\u003eProduct Warranty\u003c\/a\u003e\n\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr style=\"background-color: black; padding: 0; margin: 0px;\"\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Applications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003ctable style=\"width: 100%; table-layout: auto; line-height: 20px; font-size: 11.5pt; font-family: 'Helvetica',sans-serif; color: black;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cu\u003eYear\u003c\/u\u003e\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cu\u003eMake\u003c\/u\u003e\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cu\u003eModel\u003c\/u\u003e\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cu\u003eTrim\u003c\/u\u003e\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cu\u003eEngine\u003c\/u\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012-2015\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCivic\u003c\/td\u003e\n\u003ctd\u003eSi 2DR\/4DR\u003c\/td\u003e\n\u003ctd\u003eL4 2.4L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding-top: 20px; text-align: center;\" colspan=\"4\"\u003e\u003ca href=\"\/ja\/collections\/honda-civic\"\u003e\u003cbutton class=\"more-btn\" type=\"button\"\u003eMORE HONDA CIVIC PRODUCTS\u003c\/button\u003e\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr style=\"background-color: black; padding: 0; margin: 0px;\"\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Brand Information\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"line-height: 18px; font-size: 11.5pt; font-family: 'Helvetica',sans-serif; color: black;\"\u003eMishimoto, the world leader in performance cooling products, was created for automotive enthusiasts by automotive enthusiasts. Established in 2005, we have more than a decade of experience in working toward our goal of providing superior cooling system upgrades. Mishimoto has produced a line of upgrades to fit nearly any application, including sport compacts, powersports, trucks, Jeeps, muscle vehicles, daily drivers, and the classics. Mishimoto's corporate headquarters are located in an 82,000 sq ft office and warehousing facility in New Castle, Delaware. Next door is our 27,000 sq ft, state-of-the-art engineering studio, where we have assembled the industry's cutting-edge tools for evaluating Mishimoto test vehicles. This one-of- a-kind facility allows us to maintain a leading position in our industry. With another office in Sparks, Nevada, as well as international locations in London, Shanghai, and Sydney, we have built an unprecedented global infrastructure for the benefit of all our worldwide customers.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr style=\"background-color: black; padding: 0; margin: 0px;\"\u003e\n\u003c\/div\u003e","brand":"Mishimoto","offers":[{"title":"Default Title","offer_id":53483749802273,"sku":"MMRAD-CIV-12SI","price":399.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/3863\/6065\/files\/MMRAD-CIV-12SI_img_0.jpg?v=1789024318","url":"https:\/\/lsdmotorsports.com\/ja\/products\/mishimoto-performance-aluminum-radiator-for-2012-2015-honda-civic-si-mmrad-civ-12si","provider":"LSD Motorsports","version":"1.0","type":"link"}