{"product_id":"iag-performance-950-ej25-closed-deck-short-block","title":"IAG Performance 950 EJ25 Closed Deck Short Block","description":"\u003ch2\u003eSubaru WRX\/STI\/LGT\/FXT\u003c\/h2\u003e\n\u003cp\u003eThe IAG Performance 950 EJ25 Closed Deck Short Block represents the pinnacle of Subaru engine building, engineered for extreme power applications where reliability under stress is non-negotiable. Built with a closed deck design for maximum cylinder strength, this short block is ready to handle serious boost and track abuse.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUsually Ships In 2-3 Weeks\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIAG 950 Closed Deck EJ25 Short Block Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Halves:\u003c\/strong\u003e Converted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 99.75mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire-Lock:\u003c\/strong\u003e IAG Fire-Lock™ receiver groove machining, latest solution to prevent head gasket failure on high horsepower and high boost Subaru's - *IAG Fire-Lock™ head gaskets required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Studs:\u003c\/strong\u003e Machine Case for 14mm head studs - *Head studs are sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePistons:\u003c\/strong\u003e IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Electroless Nickel Plated Tops \u0026amp; Ring area, Ring Set, .250\" \/ .906\" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnecting Rods:\u003c\/strong\u003e IAG-Spec Tuff H-Beam +2mm \/ ARP 625+ Rod Bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod \/ Main Bearings:\u003c\/strong\u003e ACL or King Race bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankshaft:\u003c\/strong\u003e Standard New Subaru Nitride Treated 2017+ STI Crankshaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase \/ Main Bolts:\u003c\/strong\u003e Standard FHI Subaru case bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompression Ratio\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9.1:1\u003c\/strong\u003e on D Cylinder Heads (EJ255)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8.8:1\u003c\/strong\u003e on B, V and W EJ257 Heads with IAG Fire-Lock™ head gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHead Gasket Required\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e*IAG Fire-Lock™ .051\" Head Gaskets with IAG-Spec Alloy Ring Set* PN# IAG-ENG-1741\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosed Deck Block Design:\u003c\/strong\u003e Superior cylinder wall support for extreme boost applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Capacity:\u003c\/strong\u003e Designed to support 950+ BHP (710+ kW)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIAG Fire-Lock Technology:\u003c\/strong\u003e Proprietary receiver groove machining prevents head gasket failure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Machined:\u003c\/strong\u003e 99.75mm bore with CNC-machined closed deck conversion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged Internals:\u003c\/strong\u003e JE FSR forged pistons with electroless nickel plating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Bearings:\u003c\/strong\u003e ACL or King Race Series bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Crankshaft:\u003c\/strong\u003e Nitride treated 2017+ STI crankshaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assurance:\u003c\/strong\u003e Each engine is individually tested and inspected\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSubaru WRX (2002-2014)\u003c\/li\u003e\n\u003cli\u003eSubaru STI (2004-2021)\u003c\/li\u003e\n\u003cli\u003eSubaru Legacy GT (2005-2012)\u003c\/li\u003e\n\u003cli\u003eSubaru Forester XT (2004-2013)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose IAG Performance?\u003c\/h3\u003e\n\u003cp\u003eIAG Performance has built a reputation as one of the most trusted names in Subaru performance engineering. With decades of experience in motorsport and high-performance street applications, their closed deck short blocks are designed for enthusiasts who demand the absolute best foundation for high-horsepower builds. The proprietary Fire-Lock technology provides an additional layer of protection against head gasket failure, a common issue in high-boost applications.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eProfessional installation is strongly recommended. This short block requires additional components including cylinder heads, IAG Fire-Lock head gaskets (PN# IAG-ENG-1741), 14mm head studs (sold separately), timing components, oil pump, water pump, and all associated gaskets and seals. Custom tuning is mandatory for proper operation and to achieve rated power levels.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: This is a short block only. Cylinder heads, Fire-Lock head gaskets, head studs, timing components, and accessories are not included. Lead time is typically 4-6 weeks from order date.\u003c\/em\u003e\u003c\/p\u003e\n\n  \u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/ogInIZNmKo8?si=58qHU9oNldmztokz\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c\/iframe\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":50766222131504,"sku":"IAG-ENG-S950","price":11199.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/apiyke6d7__63217.1633558543.1280.1280__76099.jpg?v=1771374696","url":"https:\/\/coore.com.au\/products\/iag-performance-950-ej25-closed-deck-short-block","provider":"Coore ","version":"1.0","type":"link"}