{"product_id":"ferrea-acura-k20-31mm-5-45mm-109-15mm-30-deg-flo-dish-head-1mm-comp-plus-exhaust-valve-set-of-8","title":"Ferrea Acura K20 31mm 5.45mm 109.15mm 30 Deg Flo Dish Head +1mm Comp Plus Exhaust Valve - Set of 8","description":"\u003cdiv\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003eFERF1547P\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan itemprop=\"sku\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003ch4\u003e\u003cstrong\u003eFerrea Acura K20 31mm 5.45mm 109.15mm 30 Deg Flo Dish Head +1mm Comp Plus Exhaust Valve – Set of 8\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003eFerrea FERF1547P\u003c\/strong\u003e Competition Plus Exhaust Valves are a high-performance upgrade for Acura\/Honda K20 engines (K20A\/K20Z series). Featuring a 31mm head diameter (+1mm over stock), 5.45mm stem, 109.15mm overall length, 30-degree flo dish head design, and single-groove lock, these valves are engineered for high-RPM racing and boosted applications. Made from ultra-high-tensile-strength stainless steel with special heat-treatment and hard chrome stems, they offer exceptional durability, heat resistance, and flow characteristics. The flo dish head reduces weight while maintaining strength, improving exhaust gas flow and engine breathing. Sold as a set of 8, these valves are ideal for naturally aspirated or turbocharged K20 builds seeking maximum power, reliability, and valve train stability under extreme conditions.\u003c\/p\u003e\n\u003ch4\u003eKey Features \u0026amp; Benefits\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e+1mm Oversized Head (31mm) Increases flow potential for higher horsepower and torque\u003c\/li\u003e\n\u003cli\u003eFlo Dish Head Design Reduces valve weight, improves exhaust scavenging, and enhances high-RPM performance\u003c\/li\u003e\n\u003cli\u003eUltra-High-Tensile Stainless Steel Superior strength and heat resistance for racing\/boosted durability\u003c\/li\u003e\n\u003cli\u003eHard Chrome Stem \u0026amp; Special Heat Treatment Reduces friction, wear, and galling for extended valve life\u003c\/li\u003e\n\u003cli\u003eFerrea Competition Plus Series Trusted in motorsports for precision, reliability, and extreme conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable width=\"100%\" cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eFERF1547P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFerrea\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eAcura\/Honda K20 engines (K20A\/K20Z)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Type\u003c\/td\u003e\n\u003ctd\u003eCompetition Plus Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead Diameter\u003c\/td\u003e\n\u003ctd\u003e31mm (+1mm over stock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStem Diameter\u003c\/td\u003e\n\u003ctd\u003e5.45mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Length\u003c\/td\u003e\n\u003ctd\u003e109.15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead Angle\u003c\/td\u003e\n\u003ctd\u003e30 Degree Flo Dish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eUltra-High-Tensile Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStem Treatment\u003c\/td\u003e\n\u003ctd\u003eHard Chrome\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSet of 8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhats Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSet of 8 Competition Plus exhaust valves 31mm head, 5.45mm stem, 109.15mm length\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for high-RPM racing and boosted K20 applications excellent flow and durability\u003c\/li\u003e\n\u003cli\u003eFlo dish head reduces weight while maintaining structural integrity for high-lift cams\u003c\/li\u003e\n\u003cli\u003eCompatible with stock or aftermarket valve seats\/guides (check seat compatibility for +1mm)\u003c\/li\u003e\n\u003cli\u003eRecommended for use with Ferrea valve springs\/retainers for full valve train upgrade\u003c\/li\u003e\n\u003cli\u003ePrecision-machined in the USA Ferrea's motorsports-proven quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEstimated time: 4-8 hours (full head work recommended)\u003c\/li\u003e\n\u003cli\u003eRequires cylinder head removal and professional valve job\/seat cutting\u003c\/li\u003e\n\u003cli\u003eInstall with proper valve stem seals, keepers, and springs\u003c\/li\u003e\n\u003cli\u003eCheck valve-to-piston clearance, especially with +1mm oversized valves\u003c\/li\u003e\n\u003cli\u003eProfessional engine builder installation strongly recommended for high-performance setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"8\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2002-2006\u003c\/td\u003e\n\u003ctd\u003eAcura\u003c\/td\u003e\n\u003ctd\u003eRSX\u003c\/td\u003e\n\u003ctd\u003eK20A2 \/ K20Z1\u003c\/td\u003e\n\u003ctd\u003eExhaust valves – high-performance upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006-2011\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCivic Si\u003c\/td\u003e\n\u003ctd\u003eK20Z3\u003c\/td\u003e\n\u003ctd\u003eExhaust valves – high-performance upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2012\u003c\/td\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eAccord \/ TSX\u003c\/td\u003e\n\u003ctd\u003eK20A \/ K20Z\u003c\/td\u003e\n\u003ctd\u003eExhaust valves – high-performance upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003ctd\u003eHonda\/Acura\u003c\/td\u003e\n\u003ctd\u003eK20-Powered Vehicles\u003c\/td\u003e\n\u003ctd\u003eK20A\/K20Z Series\u003c\/td\u003e\n\u003ctd\u003eExhaust valves – custom racing\/turbo builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhy Choose Ferrea Competition Plus Valves?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUltra-high-tensile stainless steel for extreme RPM and boost durability\u003c\/li\u003e\n\u003cli\u003eFlo dish design improves flow and reduces weight for better high-RPM performance\u003c\/li\u003e\n\u003cli\u003eHard chrome stems and precision machining for reduced wear and consistent sealing\u003c\/li\u003e\n\u003cli\u003eFerrea trusted in professional racing and high-performance engine builds worldwide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Will these fit my K20A2 RSX Type-S? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, direct fit for K20A\/K20Z series exhaust valves; +1mm oversize for increased flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Are these suitable for turbo or high-boost setups? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, Competition Plus series is engineered for high-heat, high-RPM, and boosted applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to upgrade valve springs? \u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Recommended for high-RPM or boosted use; pair with Ferrea springs\/retainers to prevent float.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eShipping and Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e UPS \/ FedEx Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e In stock – ships same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Secure protective packaging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 2-3 lbs (set of 8 valves)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ferrea","offers":[{"title":"Default Title","offer_id":44550136234063,"sku":"FERF1547P","price":252.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/Ferrea_Ferrea_Acura_K20_31mm_5.45mm_109.15mm_30_Deg_Flo_Dish_Head_1mm_Comp_Plus_Exhaust_Valve_-_Set_of_8.png?v=1782311665","url":"https:\/\/www.blackopsautoworks.com\/products\/ferrea-acura-k20-31mm-5-45mm-109-15mm-30-deg-flo-dish-head-1mm-comp-plus-exhaust-valve-set-of-8","provider":"Black Ops Auto Works","version":"1.0","type":"link"}