{"product_id":"supertech-valves-black-nitride-4g63-evo-dsm","title":"Supertech Black Nitride Valves for 4G63 Evo\/DSM","description":"Supertech black nitride intake and exhaust valves for 4G63 Evo, DSM and GVR4. These valves are available in various sizes to match your head diameter. Intake and exhaust valves are sold separately or as a set of 8. For a full replacement you'll need 8 intake and 8 exhaust valves. Please do all your research and consult your engine builder if necessary!\u003cbr\u003e\u003cbr\u003eBlack 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\u003e1992-2006 Evolution I-IX\u003cbr\u003e1990-1999 Eclipse GST\/GSX\u003cbr\u003e1990-1998 Talon TSi\u003cbr\u003e1990-1994 Laser RS\u003cbr\u003e1991-1992 Galant VR-4\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 rowspan=\"2\" style=\"color: #ffffff;\"\u003eExhaust\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eStandard 30.5mm\u003cbr\u003e • Stem Diameter 6.54mm\u003cbr\u003e • Length 109.6mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMEVN-1007-8\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;\"\u003eMEVN-1007-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eExhaust\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003e+.5mm Oversize 31.0mm\u003cbr\u003e • Stem Diameter 6.54mm\u003cbr\u003e • Length 109.6mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMEVN-1008-8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e1 Valve\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMEVN-1008-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"404040\"\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eExhaust\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003e+1mm Oversize 31.5mm\u003cbr\u003e • Stem Diameter 6.54mm\u003cbr\u003e • Length 109.6mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMEVN-1009-8\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;\"\u003eMEVN-1009-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\" rowspan=\"2\"\u003eIntake\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\" rowspan=\"2\"\u003eStandard 34.0mm\u003cbr\u003e • Stem Diameter 6.57mm\u003cbr\u003e • Length 109.6mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMIVN-1007-8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e1 Valve\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMIVN-1007-1\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+.5mm Oversize 34.5mm\u003cbr\u003e • Stem Diameter 6.57mm\u003cbr\u003e • Length 109.6mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMIVN-1008-8\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;\"\u003eMIVN-1008-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\" rowspan=\"2\"\u003eIntake\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\" rowspan=\"2\"\u003e+1mm Oversize 35.0mm\u003cbr\u003e • Stem Diameter 6.57mm\u003cbr\u003e • Length 109.6mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMIVN-1009-8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e1 Valve\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMIVN-1009-1\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+2mm Oversize 36mm\u003cbr\u003e • Stem Diameter 6.57mm\u003cbr\u003e • Length 109.6mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eMIVN-1010-8\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;\"\u003eMIVN-1010-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\nThe \"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\u003eThe MEVN-1007 exhaust and MIVN-1008 intake are pictured.\u003cbr\u003e\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":"Exhaust 30.5mm (Set of 8) (MEVN-1007-8)","offer_id":50565438505302,"sku":"SUP-MEVN-1007-8","price":171.45,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 30.5mm (1 Single) (MEVN-1007-1)","offer_id":50565438538070,"sku":"SUP-MEVN-1007-1","price":23.93,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.0mm (Set of 8) (MEVN-1008-8)","offer_id":50565438570838,"sku":"SUP-MEVN-1008-8","price":175.08,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.0mm (1 Single) (MEVN-1008-1)","offer_id":50565438603606,"sku":"SUP-MEVN-1008-1","price":24.37,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.5mm (Set of 8) (MEVN-1009-8)","offer_id":50565438636374,"sku":"SUP-MEVN-1009-8","price":171.45,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.5mm (1 Single) (MEVN-1009-1)","offer_id":50565438669142,"sku":"SUP-MEVN-1009-1","price":24.37,"currency_code":"EUR","in_stock":true},{"title":"Intake 34.0mm (Set of 8) (MIVN-1007-8)","offer_id":50565438701910,"sku":"SUP-MIVN-1007-8","price":178.54,"currency_code":"EUR","in_stock":true},{"title":"Intake 34.0mm (1 Single) (MIVN-1007-1)","offer_id":50565438734678,"sku":"SUP-MIVN-1007-1","price":24.83,"currency_code":"EUR","in_stock":true},{"title":"Intake 34.5mm (Set of 8) (MIVN-1008-8)","offer_id":50565438767446,"sku":"SUP-MIVN-1008-8","price":178.63,"currency_code":"EUR","in_stock":true},{"title":"Intake 34.5mm (1 Single) (MIVN-1008-1)","offer_id":50565438800214,"sku":"SUP-MIVN-1008-1","price":24.83,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.0mm (Set of 8) (MIVN-1009-8)","offer_id":50565438832982,"sku":"SUP-MIVN-1009-8","price":178.46,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.0mm (1 Single) (MIVN-1009-1)","offer_id":50565438865750,"sku":"SUP-MIVN-1009-1","price":24.83,"currency_code":"EUR","in_stock":true},{"title":"Intake 36.0mm (Set of 8) (MIVN-1010-8)","offer_id":50565438898518,"sku":"SUP-MIVN-1010-8","price":187.64,"currency_code":"EUR","in_stock":true},{"title":"Intake 36.0mm (1 Single) (MIVN-1010-1)","offer_id":50565438931286,"sku":"SUP-MIVN-1010-1","price":24.83,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0817\/9531\/8102\/files\/MEVN-supertech-valves-black-nitride-exhaust-4g63-set-of-8.jpg?v=1749225721","url":"https:\/\/www.speed-addicts.com\/en\/products\/supertech-valves-black-nitride-4g63-evo-dsm","provider":"Speed Addicts","version":"1.0","type":"link"}