{"product_id":"bull-boost-performance-cylinder-head-stud-kit-subaru-wrx-sti-ej20-ej25-dohc-turbo-260-4701","title":"Bull Boost Performance Cylinder Head Stud Kit – Subaru WRX \/ STI EJ20 \u0026 EJ25 DOHC Turbo (260-4701)","description":"\u003ch3 data-section-id=\"suxyoc\" data-start=\"0\" data-end=\"108\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"4\" data-end=\"106\"\u003eBull Boost Performance Cylinder Head Stud Kit – Subaru WRX \/ STI EJ20 \u0026amp; EJ25 DOHC Turbo (260-4701)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"110\" data-end=\"141\"\u003e\u003cstrong data-start=\"110\" data-end=\"126\"\u003ePart Number:\u003c\/strong\u003e 720053572339\u003c\/p\u003e\n\u003chr data-start=\"143\" data-end=\"146\"\u003e\n\u003ch3 data-section-id=\"1dvqnf5\" data-start=\"148\" data-end=\"178\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"152\" data-end=\"176\"\u003eProduct Description:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"179\" data-end=\"526\"\u003eUpgrade the reliability and clamping strength of your engine with the \u003cstrong data-start=\"249\" data-end=\"298\"\u003eBull Boost Performance Cylinder Head Stud Kit\u003c\/strong\u003e, designed for Subaru EJ20 and EJ25 DOHC turbo platforms. Engineered for high-performance and boosted applications, this kit delivers the strength needed to maintain proper head gasket sealing under increased cylinder pressures.\u003c\/p\u003e\n\u003cp data-start=\"528\" data-end=\"840\"\u003eManufactured from high-grade \u003cstrong data-start=\"557\" data-end=\"579\"\u003e35CrMo alloy steel\u003c\/strong\u003e and heat-treated to \u003cstrong data-start=\"600\" data-end=\"614\"\u003eGrade 12.9\u003c\/strong\u003e, these studs offer exceptional tensile strength and durability. Whether you're building a street performance setup or a high-boost track car, this kit provides the confidence and consistency required for demanding conditions.\u003c\/p\u003e\n\u003cp data-start=\"842\" data-end=\"1000\"\u003eDesigned to meet OEM specifications while improving upon factory hardware, these studs ensure precise fitment, easier installation, and long-term reliability.\u003c\/p\u003e\n\u003chr data-start=\"1002\" data-end=\"1005\"\u003e\n\u003ch3 data-section-id=\"37mg0c\" data-start=\"1007\" data-end=\"1030\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1011\" data-end=\"1028\"\u003eKey Features:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1031\" data-end=\"1543\"\u003e\n\u003cli data-section-id=\"10llbox\" data-start=\"1031\" data-end=\"1083\"\u003ePremium \u003cstrong data-start=\"1041\" data-end=\"1067\"\u003eBull Boost Performance\u003c\/strong\u003e head stud kit\u003c\/li\u003e\n\u003cli data-section-id=\"1q2uli2\" data-start=\"1084\" data-end=\"1137\"\u003eHigh-strength \u003cstrong data-start=\"1100\" data-end=\"1135\"\u003e35CrMo alloy steel construction\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"125w1u\" data-start=\"1138\" data-end=\"1195\"\u003eHeat-treated to \u003cstrong data-start=\"1156\" data-end=\"1170\"\u003eGrade 12.9\u003c\/strong\u003e for maximum durability\u003c\/li\u003e\n\u003cli data-section-id=\"kxawlt\" data-start=\"1196\" data-end=\"1251\"\u003eApprox. \u003cstrong data-start=\"1206\" data-end=\"1249\"\u003e1200 MPa (174,000 PSI) tensile strength\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1gllboj\" data-start=\"1252\" data-end=\"1299\"\u003eBlack oxide finish for corrosion resistance\u003c\/li\u003e\n\u003cli data-section-id=\"1csf06x\" data-start=\"1300\" data-end=\"1357\"\u003eProvides superior clamping force to prevent head lift\u003c\/li\u003e\n\u003cli data-section-id=\"1bb6b5e\" data-start=\"1358\" data-end=\"1413\"\u003ePrecision threads for accurate torque and alignment\u003c\/li\u003e\n\u003cli data-section-id=\"hscu6z\" data-start=\"1414\" data-end=\"1488\"\u003eOpen-end stud design for easier cylinder head installation and removal\u003c\/li\u003e\n\u003cli data-section-id=\"arvu03\" data-start=\"1489\" data-end=\"1543\"\u003eIdeal for turbocharged and high-performance builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1545\" data-end=\"1548\"\u003e\n\u003ch3 data-section-id=\"267exh\" data-start=\"1550\" data-end=\"1568\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1554\" data-end=\"1566\"\u003eFitment:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1569\" data-end=\"1719\"\u003e\n\u003cli data-section-id=\"rxylz1\" data-start=\"1569\" data-end=\"1614\"\u003eSubaru Impreza WRX (EJ20 2.0L DOHC Turbo)\u003c\/li\u003e\n\u003cli data-section-id=\"1ljrkpf\" data-start=\"1615\" data-end=\"1664\"\u003eSubaru Impreza WRX STI (EJ25 2.5L DOHC Turbo)\u003c\/li\u003e\n\u003cli data-section-id=\"vbf0dg\" data-start=\"1665\" data-end=\"1719\"\u003eCompatible with all EJ20 \/ EJ25 DOHC turbo engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1721\" data-end=\"1724\"\u003e\n\u003ch3 data-section-id=\"1y7xkuc\" data-start=\"1726\" data-end=\"1752\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1730\" data-end=\"1750\"\u003eWhat’s Included:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1753\" data-end=\"1817\"\u003e\n\u003cli data-section-id=\"r8aqpx\" data-start=\"1753\" data-end=\"1786\"\u003e(12) 11mm Cylinder Head Studs\u003c\/li\u003e\n\u003cli data-section-id=\"osp49v\" data-start=\"1787\" data-end=\"1803\"\u003e(12) Washers\u003c\/li\u003e\n\u003cli data-section-id=\"vfifli\" data-start=\"1804\" data-end=\"1817\"\u003e(12) Nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1819\" data-end=\"1822\"\u003e\n\u003ch3 data-section-id=\"gjswvt\" data-start=\"1824\" data-end=\"1850\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1828\" data-end=\"1848\"\u003eImportant Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1851\" data-end=\"2051\"\u003e\n\u003cli data-section-id=\"am3ggq\" data-start=\"1851\" data-end=\"1910\"\u003eDesigned as a direct replacement for factory head bolts\u003c\/li\u003e\n\u003cli data-section-id=\"beu0da\" data-start=\"1911\" data-end=\"1980\"\u003eProfessional installation recommended for proper torque procedure\u003c\/li\u003e\n\u003cli data-section-id=\"6owpbr\" data-start=\"1981\" data-end=\"2051\"\u003eAlways follow proper torque specs and sequence during installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2053\" data-end=\"2056\"\u003e\n\u003ch3 data-section-id=\"46wmff\" data-start=\"2058\" data-end=\"2088\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2062\" data-end=\"2086\"\u003eWarranty Disclaimer:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2089\" data-end=\"2200\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eAll warranties, claims, and product-related issues must be handled directly through \u003cstrong data-start=\"2173\" data-end=\"2199\"\u003eBULL BOOST PERFORMANCE\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Racing Precision Motorsports","offers":[{"title":"Default Title","offer_id":45129501966396,"sku":"720053572339","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5934\/4956\/files\/EJ200_794x557_35a472a4-9a11-4ea5-a4f8-06380155ce58.webp?v=1778037165","url":"https:\/\/rpm-racing.com\/products\/bull-boost-performance-cylinder-head-stud-kit-subaru-wrx-sti-ej20-ej25-dohc-turbo-260-4701","provider":"Racing Precision Motorsports","version":"1.0","type":"link"}