{"product_id":"iag-performance-750-ej25-closed-deck-short-block","title":"IAG Performance 750 EJ25 Closed Deck Short Block","description":"\u003ch2\u003eSubaru WRX\/STI\/FXT\/LGT (EJ25)\u003c\/h2\u003e\n\u003cp\u003eThe IAG Performance 750 EJ25 Closed Deck Short Block delivers race-proven reliability for high-performance Subaru builds targeting 750+ BHP. Featuring IAG's proprietary closed deck design and premium forged internals, this short block provides the foundation for serious street and track applications where durability under boost is essential.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1 in Stock – Almost Gone\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIAG 750 Closed Deck 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\u003ePistons:\u003c\/strong\u003e IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Ring Set, .210\" 9310 Steel 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 \/ ARP2000 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\u003e9.5:1\u003c\/strong\u003e on D Cylinder EJ255 Heads w\/ OEM Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8.9:1\u003c\/strong\u003e on B, V and W EJ257 Heads w\/ OEM Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9.6:1\u003c\/strong\u003e on S20 Heads without Combustion Chamber Mod and with OEM Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9.1:1\u003c\/strong\u003e on D Cylinder EJ255 Heads w\/ .039\" JE Proseal Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8.6:1\u003c\/strong\u003e on B, V and W EJ257 Heads w\/ .039\" JE Proseal Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9.2:1\u003c\/strong\u003e on S20 Heads without Combustion Chamber Mod and with .039\" JE Proseal Head Gasket\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 high-boost applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Capacity:\u003c\/strong\u003e Designed to support 750+ BHP (560+ 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 CNC-machined closed deck conversion with exact tolerances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged Internals:\u003c\/strong\u003e High-strength forged pistons and connecting rods\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Bearings:\u003c\/strong\u003e ACL or King Race Series bearings throughout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assurance:\u003c\/strong\u003e Each engine individually tested and inspected\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 2.5L (EJ25)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock:\u003c\/strong\u003e IAG Closed Deck Block with Fire-Lock receiver groove machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 99.75mm (bored and honed)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePistons:\u003c\/strong\u003e IAG-Spec JE FSR 99.75mm 2618 forged pistons with perfect skirt coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRods:\u003c\/strong\u003e IAG-Spec Tuff H-beam connecting rods with ARP2000 rod bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankshaft:\u003c\/strong\u003e Nitride treated Subaru 2017+ STI crankshaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e ACL or King Race Series main and rod bearings\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 (1993-2021)\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\u003eRequired Components (Sold Separately)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder heads\u003c\/li\u003e\n\u003cli\u003eTiming components\u003c\/li\u003e\n\u003cli\u003eOil pump and water pump\u003c\/li\u003e\n\u003cli\u003eAll gaskets and seals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose IAG Performance?\u003c\/h3\u003e\n\u003cp\u003eIAG Performance has earned its reputation as one of the most trusted names in Subaru performance engineering. With decades of motorsport experience and countless championship-winning builds, their closed deck short blocks represent the gold standard for high-horsepower Subaru applications. Each engine is hand-assembled by experienced technicians and undergoes rigorous quality control to ensure it meets IAG's exacting standards.\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 Gaskets, head studs, 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.\u003cbr\u003e\u003cbr\u003e\u003cbr\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":50766361624880,"sku":"IAG-ENG-S750","price":9899.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/apivskc2d__78153.1633558767.1280.1280__86239.jpg?v=1771378284","url":"https:\/\/coore.com.au\/products\/iag-performance-750-ej25-closed-deck-short-block","provider":"Coore | Performance \u0026 Aftermarket","version":"1.0","type":"link"}