{"product_id":"iag-performance-arp-14mm-head-stud-set-for-subaru-wrx-sti-legacy-gt-forester-xt","title":"IAG Performance ARP 14mm Head Stud Set for Subaru WRX\/STI\/Legacy GT\/Forester XT","description":"\u003ch2\u003eSubaru WRX\/STI\/Legacy GT\/Forester XT\u003c\/h2\u003e\n\n\u003cp\u003eThe IAG Performance ARP 14mm Head Stud Set is the essential upgrade for any high-performance Subaru build, providing superior clamping force and reliability compared to factory head bolts. Engineered specifically for use with IAG closed deck blocks and Fire-Lock head gaskets, these ARP studs are mandatory for builds targeting serious power levels.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e14mm Diameter:\u003c\/strong\u003e Larger than OEM 12mm for increased clamping force and reliability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eARP2000 Material:\u003c\/strong\u003e Premium aerospace-grade alloy steel construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior Clamping Force:\u003c\/strong\u003e Maintains head gasket seal under extreme cylinder pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Threads:\u003c\/strong\u003e Rolled threads for superior strength and fatigue resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Kit:\u003c\/strong\u003e Includes studs, washers, and premium ARP assembly lubricant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable:\u003c\/strong\u003e Can be removed and reinstalled multiple times without degradation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired for IAG Builds:\u003c\/strong\u003e Mandatory for IAG closed deck blocks with Fire-Lock technology\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Diameter:\u003c\/strong\u003e 14mm (vs. OEM 12mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e ARP2000 alloy steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e Rolled threads for maximum strength\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black oxide coating for corrosion resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque Specification:\u003c\/strong\u003e Follow ARP installation instructions (included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Complete set of studs, washers, and ARP Ultra-Torque assembly lubricant\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSubaru WRX (2002-2014) - EJ25 engines\u003c\/li\u003e\n\u003cli\u003eSubaru STI (2004-2021) - EJ257 engines\u003c\/li\u003e\n\u003cli\u003eSubaru Legacy GT (2005-2012) - EJ255 engines\u003c\/li\u003e\n\u003cli\u003eSubaru Forester XT (2004-2013) - EJ255 engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Block must be machined for 14mm head studs (standard on IAG closed deck blocks)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eComplete set of ARP 14mm head studs\u003c\/li\u003e\n\u003cli\u003eHardened washers\u003c\/li\u003e\n\u003cli\u003ePremium ARP Ultra-Torque assembly lubricant\u003c\/li\u003e\n\u003cli\u003eDetailed installation instructions with torque specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Upgrade to 14mm Head Studs?\u003c\/h3\u003e\n\u003cp\u003eFactory 12mm head bolts are adequate for stock power levels, but they become a critical weakness in high-boost applications. The larger 14mm diameter provides significantly more clamping force, preventing head gasket failure and head lift under extreme cylinder pressures. ARP studs also offer superior material properties and can be torqued to higher specifications than OEM bolts, ensuring your head gasket stays sealed even at 950+ BHP.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock Preparation:\u003c\/strong\u003e Engine block MUST be machined for 14mm head studs (standard on IAG closed deck blocks)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque Wrench:\u003c\/strong\u003e Precision torque wrench required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Lube:\u003c\/strong\u003e Use only ARP Ultra-Torque lubricant (included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque Sequence:\u003c\/strong\u003e Follow ARP's specified torque sequence and values precisely\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Installation:\u003c\/strong\u003e Strongly recommended for proper installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Preparation:\u003c\/strong\u003e Block threads must be clean and chased before installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIAG 950 EJ25 Closed Deck Short Block (IAG-ENG-S950) - Required\u003c\/li\u003e\n\u003cli\u003eIAG Fire-Lock .051\" Head Gaskets (IAG-ENG-1741) - Required\u003c\/li\u003e\n\u003cli\u003eIAG Performance closed deck blocks with 14mm head stud machining\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy ARP?\u003c\/h3\u003e\n\u003cp\u003eARP (Automotive Racing Products) is the world leader in fastener technology, trusted by professional race teams and engine builders worldwide. Their proprietary ARP2000 material and precision manufacturing processes ensure consistent quality and performance. Unlike factory head bolts which are designed for single use, ARP studs can be removed and reinstalled multiple times, making them ideal for race engines that require frequent maintenance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e These 14mm head studs require the engine block to be specifically machined for 14mm studs. They will NOT fit standard Subaru blocks without proper machining. All IAG closed deck blocks come pre-machined for 14mm head studs. Professional installation and precise torque procedures are essential for proper head gasket sealing.\u003c\/em\u003e\u003c\/p\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":50766327054640,"sku":"IAG-ENG-1711","price":1179.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/apid9q4mt__65879.jpg?v=1771377344","url":"https:\/\/coore.com.au\/products\/iag-performance-arp-14mm-head-stud-set-for-subaru-wrx-sti-legacy-gt-forester-xt","provider":"Coore | Performance \u0026 Aftermarket","version":"1.0","type":"link"}