{"product_id":"med-a-series-road-competition-head-copy","title":"MED A-SERIES ULTIMATE ROAD COMPETITION HEAD","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eExclusive to MED, we consider these to be the ultimate five-port head for fast road, trackday and light competition. Our 'Ultimate' specification is now based on a brand new MED 12G940-style casting, so there's no need to send us an old used head in exchange.\u003c\/p\u003e\n\u003cp\u003eThe 21cc head chambers are accurately CNC machined to the optimum profile, the extra two head stud holes drilled, inlet and exhaust ports enlarged and the restrictive standard valve guide bosses are non-existent. Hardened unleaded exhaust valve seats are fitted as standard.  \u003c\/p\u003e\n\u003cp\u003e35.7mm x 30mm three-angle valves are manufactured from 21NS stainless steel forgings, plasma nitrided for extra strength and wear characteristics, and installed in our own high quality bronze valve guides. \u003c\/p\u003e\n\u003cp\u003eValve caps and collets are brand new MED EN24T steel versions, with MED 170lb double valve springs pre-fitted at the recommended length. \u003c\/p\u003e\n\u003cp\u003eEach head is finished by hand by our expert machinist, pressure checked to 60psi and fully assembled, ready to fit. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCylinder head features\u003cbr\u003e\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"list-style-type: none;\"\u003e\n\u003cul\u003e\n\u003cli\u003eCNC machined chambers to 21cc volume.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e35.7mm x 30mm single-groove competition 21NS stellite-tip valves.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMED bronze valve guides.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e11-stud design.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRestrictive standard valve guide boss omitted. \u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThermostat bypass deleted.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePort profiles optimised for improved flow.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eValve spring platforms accurately machined for optimal fitted spring length.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThree-angle valve seats.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHardened exhaust valve seats for unleaded fuel.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeater tap take-off ready.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e5\/8-inch UNF temperature gauge sender thread.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eViton stem seals\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMED EN24T steel valve caps and collets.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003eMED 'Road' 170lb double valve spring set.\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003eEach casting is embossed with the MED logo and numbered for future traceability.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003eIf you would prefer a new cylinder head as a DIY kit, please see \u003ca href=\"https:\/\/www.med-engineering.co.uk\/collections\/5-port\/products\/med-road-competition-copy\"\u003eMED Road Competition Cylinder Head - kit\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003ePorted to match our inlet\/exhaust gasket, part number \u003ca href=\"https:\/\/www.med-engineering.co.uk\/products\/med-inlet-exhaust-gasket?variant=44459910496549\"\u003e\u003cspan\u003eMED-1914-SG\u003c\/span\u003e\u003c\/a\u003e.  \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e \u003c\/span\u003e\u003c\/p\u003e","brand":"MED Engineering","offers":[{"title":"Default Title","offer_id":55919706046849,"sku":null,"price":2300.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/0114\/0005\/files\/IMG_6970.jpg?v=1784124790","url":"https:\/\/www.med-engineering.co.uk\/products\/med-a-series-road-competition-head-copy","provider":"MED Race Technologies","version":"1.0","type":"link"}