{"product_id":"supertech-valves-black-nitride-k20-k24-rsx-tsx","title":"Supertech Black Nitride Valves for Acura RSX TSX K20 K24","description":"Supertech black nitride exhaust and intake valves for K20\/K24 Acura RSX and TSX. These valves are available in various sizes to match your head diameter. Sold as a set of 8 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 There are a lot of options for the K-Series, please read all the information carefully and review your purchase! \u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff2a00;\"\u003eVehicle Fitment:\u003c\/span\u003e\u003cbr\u003e 2002-2006 Acura RSX Type-S\u003cbr\u003e 2004-2014 Acura TSX\u003cbr\u003e K20\/K24 DOHC VTEC\u003cbr\u003e \u003cbr\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\" border=\"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 Numbers:\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 30.0mm Dish\u003cbr\u003e • Stem Diameter 5.45mm\u003cbr\u003e • Length 108.65mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHEVN-1020D-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;\"\u003eHEVN-1020D-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;\"\u003eStandard 30.0mm Flat\u003cbr\u003e • Stem Diameter 5.45mm\u003cbr\u003e • Length 108.65mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHEVN-1020F-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;\"\u003eHEVN-1020F-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"404040\"\u003e\n\u003ctd style=\"color: #b3b3b3;\"\u003eExhaust\u003c\/td\u003e\n\u003ctd style=\"color: #b3b3b3;\"\u003e+.5mm Oversize 30.50mm Dish\u003c\/td\u003e\n\u003ctd style=\"color: #b3b3b3;\"\u003e*Discontinued*\u003c\/td\u003e\n\u003ctd style=\"color: #b3b3b3;\"\u003eHEVN-1021D\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 30.50mm Flat\u003cbr\u003e • Stem Diameter 5.45mm\u003cbr\u003e • Length 108.65mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHEVN-1021F-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;\"\u003eHEVN-1021F-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 31.00mm Dish\u003cbr\u003e • Stem Diameter 5.45mm\u003cbr\u003e • Length 108.65mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHEVN-1030D-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;\"\u003eHEVN-1030D-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+1mm Oversize 31.00mm Flat\u003cbr\u003e • Stem Diameter 5.45mm\u003cbr\u003e • Length 108.65mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHEVN-1030F-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;\"\u003eHEVN-1030F-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+1.5mm Oversize 31.5mm Flat\u003cbr\u003e • Stem Diameter 5.45mm\u003cbr\u003e • Length 108.65mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHEVN-1033F-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;\"\u003eHEVN-1033F-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr height=\"5\"\u003e\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eIntake\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eStandard 35.0mm Dish\u003cbr\u003e • Stem Diameter 5.48mm\u003cbr\u003e • Length 108.85mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHIVN-1020D-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;\"\u003eHIVN-1020D-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"404040\"\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eIntake\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eStandard 35.0mm Flat\u003cbr\u003e • Stem Diameter 5.48mm\u003cbr\u003e • Length 108.85mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHIVN-1020F-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;\"\u003eHIVN-1020F-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eIntake\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003e+.5mm Oversize 35.50mm Dish\u003cbr\u003e • Stem Diameter 5.48mm\u003cbr\u003e • Length 108.85mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHIVN-1021D-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;\"\u003eHIVN-1021D-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"404040\"\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eIntake\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003e+.5mm Oversize 35.50mm Flat\u003cbr\u003e • Stem Diameter 5.48mm\u003cbr\u003e • Length 108.85mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHIVN-1021F-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;\"\u003eHIVN-1021F-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eIntake\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003e+1mm Oversize 36.00mm Dish\u003cbr\u003e • Stem Diameter 5.48mm\u003cbr\u003e • Length 108.85mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHIVN-1022D-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;\"\u003eHIVN-1022D-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"404040\"\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eIntake\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003e+1mm Oversize 36.00mm Flat\u003cbr\u003e • Stem Diameter 5.48mm\u003cbr\u003e • Length 108.85mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHIVN-1022F-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;\"\u003eHIVN-1022F-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003eIntake\u003c\/td\u003e\n\u003ctd rowspan=\"2\" style=\"color: #ffffff;\"\u003e+2mm Oversize 37.00mm Flat\u003cbr\u003e • Stem Diameter 5.48mm\u003cbr\u003e • Length 108.85mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e8 Valves\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eHIVN-1023F-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;\"\u003eHIVN-1023F-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\u003e \u003cspan style=\"color: #ff2a00;\"\u003eNote:\u003c\/span\u003e\u003cbr\u003eImages are for reference. Some Supertech parts have varying part numbers with slashes, dashes, spaces or quantities. Some of these valve part numbers coincide with F20\/F22.\u003cbr\u003e\u003ca href=\"https:\/\/stmtuned.com\/collections\/supertech-products\" style=\"color: #afafaf;\"\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 30.0mm Dish (Set of 8) (HEVN-1020D-8)","offer_id":50562325807446,"sku":"SUP-HEVN-1020D-8","price":160.33,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 30.0mm Dish (1 Single) (HEVN-1020D-1)","offer_id":50562325840214,"sku":"SUP-HEVN-1020D-1","price":25.57,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 30.0mm Flat (Set of 8) (HEVN-1020F-8)","offer_id":50562325872982,"sku":"SUP-HEVN-1020F-8","price":175.33,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 30.0mm Flat (1 Single) (HEVN-1020F-1)","offer_id":50562325905750,"sku":"SUP-HEVN-1020F-1","price":25.57,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 30.5mm Flat (Set of 8) (HEVN-1021F-8)","offer_id":50562325938518,"sku":"SUP-HEVN-1021F-8","price":175.33,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 30.5mm Flat (1 Single) (HEVN-1021F-1)","offer_id":50562325971286,"sku":"SUP-HEVN-1021F-1","price":22.54,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.0mm Dish (Set of 8) (HEVN-1030D-8)","offer_id":50562326004054,"sku":"SUP-HEVN-1030D-8","price":181.57,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.0mm Dish (1 Single) (HEVN-1030D-1)","offer_id":50562326036822,"sku":"SUP-HEVN-1030D-1","price":23.33,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.0mm Flat (Set of 8) (HEVN-1030F-8)","offer_id":50562326069590,"sku":"SUP-HEVN-1030F-8","price":181.57,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.0mm Flat (1 Single) (HEVN-1030F-1)","offer_id":50562326102358,"sku":"SUP-HEVN-1030F-1","price":23.33,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.5mm Flat (Set of 8) (HEVN-1033F-8)","offer_id":50562326135126,"sku":"SUP-HEVN-1033F-8","price":181.57,"currency_code":"EUR","in_stock":true},{"title":"Exhaust 31.5mm Flat (1 Single) (HEVN-1033F-1)","offer_id":50562326167894,"sku":"SUP-HEVN-1033F-1","price":23.33,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.0mm Dish (Set of 8) (HIVN-1020D-8)","offer_id":50562326200662,"sku":"SUP-HIVN-1020D-8","price":177.92,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.0mm Dish (1 Single) (HIVN-1020D-1)","offer_id":50562326233430,"sku":"SUP-HIVN-1020D-1","price":25.97,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.0mm Flat (Set of 8) (HIVN-1020F-8)","offer_id":50562326266198,"sku":"SUP-HIVN-1020F-8","price":177.92,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.0mm Flat (1 Single) (HIVN-1020F-1)","offer_id":50562326298966,"sku":"SUP-HIVN-1020F-1","price":22.86,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.5mm Dish (Set of 8) (HIVN-1021D-8)","offer_id":50562326331734,"sku":"SUP-HIVN-1021D-8","price":177.92,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.5mm Dish (1 Single) (HIVN-1021D-1)","offer_id":50562326364502,"sku":"SUP-HIVN-1021D-1","price":22.86,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.5mm Flat (Set of 8) (HIVN-1021F-8)","offer_id":50562326397270,"sku":"SUP-HIVN-1021F-8","price":177.92,"currency_code":"EUR","in_stock":true},{"title":"Intake 35.5mm Flat (1 Single) (HIVN-1021F-1)","offer_id":50562326430038,"sku":"SUP-HIVN-1021F-1","price":22.86,"currency_code":"EUR","in_stock":true},{"title":"Intake 36.0mm Dish (Set of 8) (HIVN-1022D-8)","offer_id":50562326462806,"sku":"SUP-HIVN-1022D-8","price":177.92,"currency_code":"EUR","in_stock":true},{"title":"Intake 36.0mm Dish (1 Single) (HIVN-1022D-1)","offer_id":50562326495574,"sku":"SUP-HIVN-1022D-1","price":22.86,"currency_code":"EUR","in_stock":true},{"title":"Intake 36.0mm Flat (Set of 8) (HIVN-1022F-8)","offer_id":50562326528342,"sku":"SUP-HIVN-1022F-8","price":177.92,"currency_code":"EUR","in_stock":true},{"title":"Intake 36.0mm Flat (1 Single) (HIVN-1022F-1)","offer_id":50562326561110,"sku":"SUP-HIVN-1022F-1","price":22.86,"currency_code":"EUR","in_stock":true},{"title":"Intake 37.0mm Flat (Set of 8) (HIVN-1023F-8)","offer_id":50562326593878,"sku":"SUP-HIVN-1023F-8","price":190.59,"currency_code":"EUR","in_stock":true},{"title":"Intake 37.0mm Flat (1 Single) (HIVN-1023F-1)","offer_id":50562326626646,"sku":"SUP-HIVN-1023F-1","price":24.45,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0817\/9531\/8102\/files\/supertech-valves-black-nitride-k20-k24-rsx-tsx-1.jpg?v=1749201337","url":"https:\/\/www.speed-addicts.com\/en\/products\/supertech-valves-black-nitride-k20-k24-rsx-tsx","provider":"Speed Addicts","version":"1.0","type":"link"}