{"product_id":"iag-performance-800-series-fa20-12-5-1-compression-ratio-closed-deck-short-block-2013-2021-brz-2013-2016-frs-2017-2021-gt86","title":"IAG 800 Series FA20 (12.5:1 Compression Ratio) Closed Deck Short Block 13-21 BRZ \/ FRS \/ GT86","description":"\u003cdiv class=\"shg-c\" id=\"s-38e8c126-719c-47b8-a4c8-314d11c96a4c\"\u003e\n\u003cdiv class=\"shg-row\" data-col-grid-mode-on=\"\"\u003e\n\u003cdiv class=\"shg-c-lg-6 shg-c-md-6 shg-c-sm-6 shg-c-xs-12\"\u003e\n\u003cdiv id=\"s-53263f09-7673-4c0c-84c0-3fe90e6b277d\" class=\"shg-c\"\u003e\n\u003cdiv class=\"shg-rich-text shg-theme-text-content\"\u003e\n\u003cdiv class=\"shg-c\" id=\"s-0244def9-48d3-4c52-96e8-691ebadd0fc1\"\u003e\n\u003cdiv class=\"shg-row\" data-col-grid-mode-on=\"\"\u003e\n\u003cdiv class=\"shg-c-lg-6 shg-c-md-6 shg-c-sm-6 shg-c-xs-12\"\u003e\n\u003cdiv id=\"s-2a1bd60c-7dae-494b-901b-d885ccc5875f\" class=\"shg-c\"\u003e\n\u003cdiv class=\"shg-rich-text shg-theme-text-content\"\u003e\n\u003cp data-start=\"142\" data-end=\"560\"\u003eThe IAG 800 Short Block is built for modified FA20 Subaru BRZs and FT86s that need a stronger short block to handle higher cylinder pressures from larger turbochargers. It features a proprietary closed-deck system to reinforce the OEM FA20 cylinder walls, IAG Spec H-Beam forged connecting rods, and enhanced head gasket sealing with o-rings and 1\/2\" head studs—perfect for fully bolted-on and upgraded turbo setups.\u003c\/p\u003e\n\u003cp data-start=\"142\" data-end=\"560\"\u003eStarting with new FA20 engine case halves, each block is machined for improved oil flow and assembled with IAG Closed Deck Inserts, which maintain coolant passages while transforming the block into a solid deck. O-ring grooves and drilled\/tapped holes for 1\/2\" head studs reduce head gasket failure under high cylinder pressures. The block is bored and honed to 86.1mm using our Sunnen SV-30 hone for precise piston-to-wall clearance. Assembly includes a 2020 FA20 crankshaft, IAG Spec H-Beam rods with ARP2000 bolts, and King or ACL bearings. Case halves are sealed with OEM bolts and sealant, and IAG Spec 86.1mm forged pistons complete the build.\u003c\/p\u003e\n\u003cp data-start=\"562\" data-end=\"1250\"\u003eInternal oil passages are inspected and optimized to ensure proper flow, addressing OEM limitations for improved reliability under boost.\u003c\/p\u003e\n\u003cp data-start=\"1252\" data-end=\"1419\"\u003eThe IAG 800 uses JE FSR 86.1mm forged pistons made from 2618 T6 Alloy. Asymmetrical skirts reduce weight and friction while maintaining strength. Smooth dome and dish radii promote excellent flame travel. Pistons are secured with .905 x 2.250\" x .210\" carbon steel wrist pins and Tru Arc locks. This block features 12.5:1 standard compression pistons, ideal for low-boost or stock applications.\u003c\/p\u003e\n\u003cdiv class=\"shg-c-lg-6 shg-c-md-6 shg-c-sm-6 shg-c-xs-12\"\u003e\n\u003cdiv id=\"s-2e0d35e5-2947-4c98-b0ba-35b0c2c5e781\" class=\"shg-c\"\u003e\n\u003cdiv class=\"shg-rich-text shg-theme-text-content\"\u003e\n\u003cdiv class=\"shg-c\" id=\"s-3f0a24d7-d496-47a3-9174-fc9a80bab58f\"\u003e\n\u003cdiv class=\"shg-row\" data-col-grid-mode-on=\"\"\u003e\n\u003cdiv class=\"shg-c-lg-6 shg-c-md-6 shg-c-sm-6 shg-c-xs-12\"\u003e\n\u003cdiv id=\"s-977d328a-6d17-4c94-aea0-60c7e662dda4\" class=\"shg-c\"\u003e\n\u003cdiv class=\"shg-rich-text shg-theme-text-content\"\u003e\n\u003cdiv class=\"shg-c-lg-6 shg-c-md-6 shg-c-sm-6 shg-c-xs-12\"\u003e\n\u003cdiv id=\"s-d7646787-0279-46d2-a5b9-0cf8a67263e6\" class=\"shg-c\"\u003e\n\u003cdiv class=\"shg-rich-text shg-theme-text-content\"\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Halves -\u003c\/strong\u003eBrand new OEM Subaru FA20 case halves, bored and honed to 86.1mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Machining -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eModified for improved oiling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase Machining -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBored and honed to 86.1mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Ringing\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Machine and O-Ring Deck Surface\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Studs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Machine Case for 1\/2\" head studs - *Head studs are sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePistons -\u003c\/strong\u003eIAG-Spec JE 86.1mm Forged Pistons, Ring Set, and .210\" x 2.250\" Chromoly Wrist Pins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnecting Rods -\u003c\/strong\u003eIAG-Spec H-Beam \/ ARP2000 Rod Bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod -\u003c\/strong\u003eACL or King XPG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Bearings\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e-OEM or King XPG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankshaft -\u003c\/strong\u003eNew Subaru FA20 crankshaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCase \/ Main Bolts -\u003c\/strong\u003eStandard Subaru case bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- OEM Oil Plug - comes preinstalled at the oil pan location\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote: \u003c\/strong\u003eCompression Ratio\u003cstrong\u003e: \u003c\/strong\u003e12.5:1 compression on standard gasket thickness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"shg-c\" id=\"s-9b28df8f-ba89-4547-bdca-8b9b3273974c\"\u003e\n\u003cdiv class=\"shg-row\" data-col-grid-mode-on=\"\"\u003e\n\u003cdiv class=\"shg-c-lg-6 shg-c-md-6 shg-c-sm-6 shg-c-xs-12\"\u003e\n\u003cdiv id=\"s-47d77730-56c3-4b89-adb9-a314cb85ae6e\" class=\"shg-c shg-align-center\"\u003e\n\u003cdiv class=\"shogun-heading-component\" data-animations='[{\"event\":\"enterviewport\",\"name\":\"fadeInLeft\",\"delay\":\"\",\"duration\":\"\",\"iterationCount\":\"\",\"shouldBeTriggeredOnce\":false}]'\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/3rKfIKsTcMU?si=Din5g5IpxcWTDYW5\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":44550680215727,"sku":"IAG-ENG-S886H","price":6499.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/3598\/4815\/files\/iag-performance-800-series-fa20-1251-compression-ratio-closed-deck-short-block-2013-2021-brz-2013-2016-frs-2017-2021-gt86-iag-eng-s886h-630336.jpg?v=1730850330","url":"https:\/\/subimods.com\/products\/iag-performance-800-series-fa20-12-5-1-compression-ratio-closed-deck-short-block-2013-2021-brz-2013-2016-frs-2017-2021-gt86","provider":"Subimods.com","version":"1.0","type":"link"}