{"product_id":"4b11t-1mm-intake-valve-set","title":"4B11T +1mm Intake Valve Set","description":"The GSC Power Division 4B11T 21-4N Chrome Polished Intake Valve Set is engineered for performance enthusiasts seeking to maximize airflow in their Mitsubishi Lancer Evolution X (2008-2016) and Lancer Ralliart (2009-2014) models.\n\nThese intake valves feature a 36mm head diameter, which is 1mm larger than stock, to significantly increase intake flow capacity and support builds up to 500+ horsepower. Constructed from a high-nickel alloy 21-4N stainless steel, they are built to withstand high boost and temperatures up to 1600°F, making them ideal for turbocharged applications.\n\nInstallation requires professional attention. Specifically, valve seat machining of 0.5-1.0mm for the 36mm head using a multi-angle cutter is necessary to achieve a proper interference fit. It is also recommended to inspect valve guides for wear before installation, with bronze guides being a consideration for extreme builds. While stock springs can work for mild builds under 350whp, upgrading to GSC springs is advised for builds over 400whp to control valve float at 9000+ RPM.\n\nThis set is compatible with OEM retainers and GSC valve springs part #2003 or equivalents. The fitment includes the 2008-2015 Mitsubishi Lancer Evolution X (GSR, MR, and Final Edition submodels with the stock 4B11T cylinder head) and the 2009-2014 Mitsubishi Lancer Ralliart.","brand":"GSC Power-Division","offers":[{"title":"Default Title","offer_id":52688623862072,"sku":"GSC2024-8","price":154.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687902652.jpg?v=1784891994","url":"https:\/\/store.motormia.co\/products\/4b11t-1mm-intake-valve-set","provider":"MOTORMIA","version":"1.0","type":"link"}