{"product_id":"mishimoto-performance-aluminum-radiator-02-05-ep3-civic-si","title":"Mishimoto Performance Aluminum Radiator for 02-05 Civic Si","description":"\u003cul\u003e\n\u003cli\u003eDual-Core Aluminum, No Plastic to Crack \u003c\/li\u003e\n\u003cli\u003eFits EP3 Si \u0026amp; UKDM Type R \u003c\/li\u003e\n\u003cli\u003eCorrect M18x1.5 Fan Switch Port \u003c\/li\u003e\n\u003cli\u003eHigh-Pressure Cap \u0026amp; Magnetic Drain Plug \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eMishimoto Performance Aluminum Radiator (MMRAD-CIV-02SI) - 2002-2005 Civic Si (EP3)\u003c\/h3\u003e\n\n\u003cp\u003eThe EP3 Si runs the K20, and anyone who's tracked one knows the factory radiator gets overwhelmed when you lean on it, coolant temps climb, and the cooling system becomes the thing holding you back on a hot session. This Mishimoto radiator fixes that: a dual-core aluminum unit that holds more coolant, sheds heat better, and won't crack like the aging plastic-tank original. It's a direct fit for the EP3, and it drops in whether you're chasing a leak or building the car for track days.\u003c\/p\u003e\n\n\u003ch4\u003eWhy Swap The Stock One\u003c\/h4\u003e\n\n\u003cp\u003eTwo reasons, and which one applies depends on how you drive the car.\u003c\/p\u003e\n\n\u003cp\u003eIf your EP3 is getting on in years, the factory radiator's plastic end tanks are a known crack-and-leak point, so this is the permanent fix, welded aluminum tanks with nothing to go brittle.\u003c\/p\u003e\n\n\u003cp\u003eIf you track or autocross the car, it's about capacity. The K20 makes real heat when you're working it, and the stock radiator doesn't have the margin for back-to-back sessions on a hot day. More coolant and better dissipation keep temps where they belong so you're not watching the gauge instead of the apex.\u003c\/p\u003e\n\n\u003ch4\u003eDual-Core Aluminum\u003c\/h4\u003e\n\n\u003cp\u003eIt's a \u003cstrong\u003etwo-row, 1.42\" brazed aluminum core with TIG-welded end tanks\u003c\/strong\u003e, holding 1.58 gallons, more than stock. Aluminum handles heat and pressure better than the factory plastic-and-aluminum unit and sheds heat more efficiently, so both the construction and the extra capacity work in your favor. The \u003cstrong\u003epolished end tanks\u003c\/strong\u003e are a nice touch too, they clean up the engine bay in a car where you actually see the radiator.\u003c\/p\u003e\n\n\u003cp\u003eThe included \u003cstrong\u003e1.3 bar high-pressure cap\u003c\/strong\u003e raises the coolant's boiling point, more pressure means it can run hotter before it boils, which is exactly the margin you want on track. A \u003cstrong\u003emagnetic drain plug\u003c\/strong\u003e is in there as well, catching metal debris in the system before it circulates through your pump and engine.\u003c\/p\u003e\n\n\u003ch4\u003eIt Also Fits The UKDM Type R\u003c\/h4\u003e\n\n\u003cp\u003eWorth knowing: this radiator fits the \u003cstrong\u003eUSDM EP3 Civic Si and the UKDM EP3 Civic Type R\u003c\/strong\u003e (2002-2005). Same chassis, same radiator, so whichever EP3 you've got, this is the one.\u003c\/p\u003e\n\n\u003ch4\u003eAbout The Fan Switch Port\u003c\/h4\u003e\n\n\u003cp\u003eA common question on this radiator, so here's the answer up front: it includes the proper \u003cstrong\u003eM18x1.5 port for the radiator fan switch\u003c\/strong\u003e, located next to the outlet, same as the factory setup. It ships capped, so you'll uncap it and transfer your fan switch over on install. Nothing's welded over, you've got the port you need.\u003c\/p\u003e\n\n\u003ch4\u003eManual Transmission\u003c\/h4\u003e\n\n\u003cp\u003eNote this radiator is for \u003cstrong\u003emanual transmission\u003c\/strong\u003e EP3s. Given it's the Si (and Type R), that covers the vast majority of these cars, but worth confirming you're running a manual before ordering.\u003c\/p\u003e\n\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\n\u003cp\u003e2002-2005 Honda Civic Si (EP3, K20A3), USDM\u003cbr\u003e2002-2005 Honda Civic Type R (EP3), UKDM\u003c\/p\u003e\n\n\u003cp\u003ePart number MMRAD-CIV-02SI. Manual transmission. Direct fit, factory location. Have an 01-05 Non-Si? That takes a \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/mishimoto-performance-aluminum-radiator-01-05-civic-non-si\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edifferent radiator\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch4\u003eWho Should Grab This\u003c\/h4\u003e\n\n\u003cp\u003eThis is for the EP3 Si or Type R owner who tracks the car and wants cooling that keeps up, or whose factory radiator is cracking at the plastic tanks. Dual-core aluminum that won't fail like the original, more capacity, the correct fan switch port, a high-pressure cap and magnetic drain plug included, and polished tanks that look right in the bay. Drop it in and keep the K20 cool when you're pushing it.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e 2002-2005 Civic Si (EP3, K20A3, USDM) and Civic Type R (EP3, UKDM), manual transmission. \u003cstrong\u003ePart number:\u003c\/strong\u003e MMRAD-CIV-02SI. \u003cstrong\u003eConstruction:\u003c\/strong\u003e dual-core (2-row) 1.42\" brazed aluminum, TIG-welded polished end tanks. \u003cstrong\u003eCapacity:\u003c\/strong\u003e 1.58 gal. \u003cstrong\u003eFan switch:\u003c\/strong\u003e M18x1.5 port included (capped). \u003cstrong\u003eIncludes:\u003c\/strong\u003e 1.3 bar high-pressure cap, magnetic drain plug. \u003cstrong\u003eInstall:\u003c\/strong\u003e direct fit, factory location. \u003cstrong\u003eWarranty:\u003c\/strong\u003e Mishimoto lifetime.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cp\u003e2002-2005 Honda Civic Si\u003cbr\u003e2001-2005 Honda Civic Type R\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Mishimoto","offers":[{"title":"Default Title","offer_id":67663234629666,"sku":"MIS-MMRAD-CIV-02SI","price":299.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/53b481deceab5eb72fcef24eeb9d01dfL.jpg?v=1790970642","url":"https:\/\/www.hybrid-racing.com\/products\/mishimoto-performance-aluminum-radiator-02-05-ep3-civic-si","provider":"Hybrid Racing","version":"1.0","type":"link"}