{"product_id":"5150-bmw-toyota-b58-performance-valve-seat-set-by-5150-autosport","title":"B58 High Performance Valve Seats","description":"\u003cp\u003e\u003cstrong\u003e5150 MoldStar 90 High Performance Valve Seat Set – BMW \u0026amp; Toyota B58\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 5150 MoldStar 90 Valve Seat Kit is designed for high horsepower BMW and Toyota B58 cylinder heads operating under extreme boost, cylinder pressure, exhaust temperature, and RPM.\u003c\/p\u003e\n\u003cp\u003eEach complete kit includes 12 intake and 12 exhaust valve seats manufactured from MoldStar 90, a premium beryllium-free copper alloy selected for its combination of excellent thermal conductivity, strength, wear resistance, and high-temperature performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Replace the Factory Valve Seats?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a factory B58, the OEM valve seats are designed around factory power, RPM, temperature, emissions, and durability requirements. Once the engine is pushed into serious racing territory, the demands placed on the valve and seat increase dramatically.\u003c\/p\u003e\n\u003cp\u003eThe valve seat does much more than provide a surface for the valve to close against. It is responsible for maintaining the seal of the combustion chamber while also providing an important path for transferring heat out of the valve and into the cylinder head.\u003c\/p\u003e\n\u003cp\u003eThis becomes especially important on high-boost racing engines where exhaust gas temperature and cylinder pressure are significantly increased.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy MoldStar 90?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHeat management is one of the biggest advantages.\u003c\/p\u003e\n\u003cp\u003eEvery time the valve closes against the seat, heat is transferred from the valve into the seat and then into the surrounding cylinder head. MoldStar 90's copper-based construction provides excellent thermal conductivity, helping remove heat from the valve more efficiently.\u003c\/p\u003e\n\u003cp\u003eControlling valve temperature becomes increasingly important in applications involving:\u003c\/p\u003e\n\u003cp\u003eHigh boost and cylinder pressure\u003cbr\u003eHigh exhaust gas temperatures\u003cbr\u003eLarge turbochargers\u003cbr\u003eExtended high-RPM operation\u003cbr\u003eDrag and roll racing\u003cbr\u003eRoad and circuit racing\u003cbr\u003eUpgraded camshafts and valve springs\u003cbr\u003eOversized performance valves\u003cbr\u003eFully CNC-ported racing cylinder heads\u003cbr\u003eImproved Valve Sealing\u003c\/p\u003e\n\u003cp\u003eAt extreme cylinder pressures, maintaining a precise valve-to-seat seal is critical. A compromised valve job can result in lost compression, reduced combustion efficiency, excessive valve temperature, and eventually valve or seat damage.\u003c\/p\u003e\n\u003cp\u003eProperly machined MoldStar 90 seats provide an excellent foundation for a precision performance valve job and help maintain consistent sealing under demanding operating conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBetter Heat Transfer = Better Valve Protection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe exhaust valve is one of the most thermally stressed components in a turbocharged engine. A significant amount of its heat is transferred through the valve face when it contacts the valve seat.\u003c\/p\u003e\n\u003cp\u003eImproving this heat-transfer path can help control valve temperatures and is particularly beneficial on B58 engines experiencing sustained high EGT and increased boost.\u003c\/p\u003e\n\u003cp\u003eThis is why we consider the valve seat an important component when building a complete competition B58 cylinder head, rather than focusing only on larger valves, stronger springs, and aggressive camshafts.\u003c\/p\u003e\n\u003cp\u003eDesigned for Serious B58 Builds\u003c\/p\u003e\n\u003cp\u003eWe recommend MoldStar 90 valve seats when building B58 cylinder heads for applications where power, boost, RPM, and operating temperature have moved substantially beyond factory levels.\u003c\/p\u003e\n\u003cp\u003eThey are also an excellent choice when installing oversized valves or replacing damaged factory valve seats, allowing the machine shop to establish the correct seat geometry specifically for the new valve and intended application.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKit Includes\u003c\/strong\u003e\u003cbr\u003e12 x Intake Valve Seats\u003cbr\u003e12 x Exhaust Valve Seats\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eBeryllium-Free Copper Alloy\u003cbr\u003eExcellent Thermal Conductivity\u003cbr\u003eHigh Strength and Wear Resistance\u003cbr\u003eDesigned for High-Boost \u0026amp; High-RPM Applications\u003cbr\u003eIdeal for Oversized Performance Valves\u003cbr\u003eExcellent Foundation for Precision Multi-Angle Valve Jobs\u003cbr\u003eDesigned for BMW \u0026amp; Toyota B58 Cylinder Heads\u003cbr\u003eProfessional Machining Required\u003c\/p\u003e\n\u003cp\u003eMoldStar 90 valve seats require professional cylinder-head machining and installation. Correct interference fit, seat depth, concentricity, valve-seat width, and final valve-job geometry are critical.\u003c\/p\u003e\n\u003cp\u003eFor maximum-effort B58 racing engines, we recommend combining MoldStar 90 seats with upgraded valves, performance valve guides, springs and retainers, performance camshafts, and a professionally CNC-machined cylinder head.\u003c\/p\u003e\n\u003cp\u003eWhen you're pushing extreme boost and power, keeping the valves cool and the combustion chamber properly sealed becomes critical. MoldStar 90 seats give the B58 cylinder head the thermal management and valve-seat foundation needed for serious racing applications.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eBMW B58 Gen 1 Applications:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e1 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2016-2019     F20\/F21     M140i\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2016-2019     F22\/F23     M240i\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2015-2019     F30\/F31     340i \/ 340i xDrive\u003cbr\u003e2016-2019     F34     340i GT \/ 340i GT xDrive\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2016-2020     F32\/F33\/F36     440i \/ 440i xDrive\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2016-2019     G30\/G31     540i \/ 540i xDrive\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2017-2019     G32     640i GT \/ 640i GT xDrive\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2015-2019     G11\/G12     740i \/ 740i xDrive\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eX3 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2017-2019     G01     X3 M40i\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eX4 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2018-2019     G02     X4 M40i\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eBMW B58 Gen 2 Applications:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e3 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2019-Present     G20\/G21     M340i \/ M340i xDrive\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2020-Present     G22\/G23\/G26     M440i \/ M440i xDrive\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eZ Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2019-Present     G29     Z4 M40i\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2020-Present     G30\/G31 LCI     540i \/ 540i xDrive\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e6 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2020-Present     G32 LCI     640i GT \/ GT 640i xDrive \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2019-Present     G11\/G12 LCI     740i \/ 740i xDrive\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eX3 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2020-Present     G01     X3 M40i\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eX4 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2020-Present     G02     X4 M40i\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eX5 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2018-Present     G05     X5 xDrive40i\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eX6 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2019-Present     G06     X6 xDrive40i\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eX7 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2018-Present     G07     X7 xDrive40i\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eALPINA B58 Gen 2 Applications:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eB3 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2020-Present     G20\/G21     B3\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eB4 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2022-Present     G22     B4\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eB5 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2020-Present     G30     B5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eXB7 Series\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2020-Present     G07     XB7\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eToyota B58 Gen 2 Applications:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eA90 \/ A91 Supra\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003e2020-Present     GR Supra 3.0     \u003cbr\u003e2020-Present     GR Supra 3.0 Premium     \u003cbr\u003e2021-Present     GR Supra 3.0 A91 Edition\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eSupplied in Egypt by iCode — the official 5150 AutoSport dealer.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cem\u003ePrice shown in EGP is an estimate at today's exchange rate. Final price confirmed after shipping and customs fees.\u003c\/em\u003e\u003c\/p\u003e","brand":"5150 AutoSport","offers":[{"title":"Default Title","offer_id":68329848832199,"sku":"5150-BVS-B58","price":54029.46,"currency_code":"EGP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/2108\/3847\/files\/Replacement-Valve-Seats-for-BMW-Toyota-B58-Engines.webp?v=1794334347","url":"https:\/\/icode-egypt.com\/products\/5150-bmw-toyota-b58-performance-valve-seat-set-by-5150-autosport","provider":"iCode - EG","version":"1.0","type":"link"}