{"product_id":"nivn-supertech-valves-black-nitride-intake-r35-gtr","title":"Supertech Black Nitride Intake Valves for R35 GTR","description":"Supertech black nitride intake valves for VR38DETT Nissan R35 GTR. These valves are available 38.15mm (+1mm) size to match your head diameter. Sold as a set of 12 or individually as needed. Please do all your research and consult your engine builder if necessary! Black nitride valves are made from one piece forged stainless steel then go through a special hardening process to lessen the friction between the valve and guide.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff2a00;\"\u003eVehicle Fitment:\u003c\/span\u003e\u003cbr\u003e2009+ Nissan R35 GTR\u003cbr\u003e• For intake valves only\u003cbr\u003e• Exhaust valves are sold separately\u003cbr\u003e\u003cbr\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable border=\"0\" cellpadding=\"0\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eFitment:\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eSize:\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eIncludes:\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003ePart Number:\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"404040\"\u003e\n\u003ctd style=\"color: #ffffff;\" rowspan=\"2\"\u003eIntake\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\" rowspan=\"2\"\u003e+1mm Oversize 38.15mm\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e12 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eNIVN-1062-12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"404040\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e1 Valve\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eNIVN-1062-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e\u003cspan style=\"color: #b3b3b3;\"\u003eIntake\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e\u003cspan style=\"color: #b3b3b3;\"\u003e+1.35mm Oversize 38.5mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e\u003cspan style=\"color: #b3b3b3;\"\u003e*Discontinued*\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e\u003cspan style=\"color: #b3b3b3;\"\u003eNIVN-1063\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cspan style=\"color: #ff2a00;\"\u003eAdditional Valve Specs:\u003c\/span\u003e\u003cbr\u003e • Stem Diameter 5.96mm\u003cbr\u003e • Length 95.00mm\u003cbr\u003e\u003cbr\u003eThe \"Black Nitride\" is a hardening treatment that is applied to the whole valve whereas the chrome coating is only applied to the stem. The microhardness is higher than the stainless steel base material, keeping good ductility beneath the hard nitrided layer. Microhardness is 800HV minimum.\u003cbr\u003e\u003cbr\u003eThe Black Nitride surface finish is smoother than with chromed stems, having less friction between stem and guide. The higher the engine speed the bigger the power loss due to internal engine friction! The Black Nitride reduces this power loss due to less valve-guide friction.\u003cbr\u003e\u003cbr\u003ePhotos are for reference.\u003cbr\u003e\u003ca style=\"color: #afafaf;\" href=\"https:\/\/stmtuned.com\/collections\/supertech-products\"\u003e\u003cbr\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: .8em;\"\u003e See more Supertech Parts\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/a\u003e","brand":"Supertech","offers":[{"title":"Oversize 38.15mm (Set of 12) (NIVN-1062-12)","offer_id":50565236621654,"sku":"SUP-NIVN-1062-12","price":318.88,"currency_code":"EUR","in_stock":true},{"title":"Oversize 38.15mm (1 Single) (NIVN-1062-1)","offer_id":50565236654422,"sku":"SUP-NIVN-1062-1","price":32.68,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0817\/9531\/8102\/files\/NIVN-supertech-valves-black-nitride-intake-r35-gtr-set-of-12.jpg?v=1749224266","url":"https:\/\/www.speed-addicts.com\/en\/products\/nivn-supertech-valves-black-nitride-intake-r35-gtr","provider":"Speed Addicts","version":"1.0","type":"link"}