{"product_id":"arcuri-supape-pro-xp-k20-k24-skunk2-311-05-7380","title":"Skunk2 Pro XP Valve Springs for Honda K20, K24, F20C and F22C Engines","description":"\u003cdiv class=\"mts-description-container\"\u003e\n\u003cp\u003eSkunk2 Pro XP valve springs keep the valves under control on Honda K20, K24, F20C and F22C engines, with no valve float above 11,000 rpm. XP means extra seat pressure, for turbocharged and very high rpm engines, while keeping the coil bind height for high-lift camshafts.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSkunk2 Racing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e311-05-7380\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003edual springs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeat pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e445 N (100 lbf) at 40.64 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOpen pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1134 N (255 lbf) at 27.94 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoil bind\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e22.61 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax lift\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17.27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eWhich cars it fits\u003c\/h3\u003e\n\u003cul class=\"mts-notes-list\"\u003e\n\u003cli\u003eHonda K20, K24, F20C and F22C engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat to check\u003c\/h3\u003e\n\u003cul class=\"mts-notes-list\"\u003e\n\u003cli\u003eDual springs wound from Japanese chrome-silicon wire: the inner and outer springs are mated with a slight interference fit and have different frequencies, so they do not resonate together.\u003c\/li\u003e\n\u003cli\u003eThe wire is 100% eddy-current inspected before coiling, then the springs are heat treated, shot peened, chemically polished and nitrided.\u003c\/li\u003e\n\u003cli\u003eOn single-spring K-series heads and on F20C \/ F22C engines they fit only with the Skunk2 312-05-0010 spring bases.\u003c\/li\u003e\n\u003cli\u003eOn 2004 and newer engines, Skunk2 titanium retainers need pre-2004 keepers (no laser-etched marks on the top edge): the angle differs, and the wrong combination can damage the engine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Skunk2 Racing","offers":[{"title":"Default Title","offer_id":54985042755922,"sku":"311-05-7380","price":2833.0,"currency_code":"RON","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1044\/6857\/8642\/files\/311-05-7380-1.jpg?v=1791412620","url":"https:\/\/letsrace.ro\/en\/products\/pro-xp-valve-springs-k20-k24-skunk2-311-05-7380","provider":"Let's Race | Echipamente Motorsport, Trackday si Karting","version":"1.0","type":"link"}