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IAG Performance IAG 950 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 950 BHP IAG-ENG-S950
$7,753.99
The IAG 950 Short Block is the ultimate "weekend racer" block. Built to withstand up to 950 BHP, this is our strongest "Street" short block offering. The IAG 950 short block features +2mm IAG Spec H-Beam forged connecting rods, IAG-Spec JE Pistons with electroless nickel plated coating with H13 tool steel wrist pins, and our venerable "Fire-Lock™" head gasket system for 14mm head studs. Each IAG 950 short block is hand assembled using ACL or King rod and main bearings. This combination of parts makes the IAG 950 the perfect block for drag or road racing. The IAG 950 Short Block starts with brand new Subaru 2.5L engine case halves. Our machinists machine the assembled case halves in our Haas VF-4SS CNC mill to accept the IAG Closed Deck inserts, transforming the block into a solid deck. Next, a deck pair of deck plates are attached and the short block is bored and honed to 99.75mm in our in-house Sunnen SV-30 computer controlled cylinder hone. IAG's in-house honing process allows us to set custom piston to wall clearances to ensure quiet operation and reduced oil consumption. The Haas mill also cuts a groove at the top of each cylinder to accept the Fire-Lock™ head gasket rings and drills each head bolt hole for 14mm head studs. The modified case halves are then assembled using a new 2017+ Subaru 2.5L nitride treated STI crankshaft and IAG-Spec Tuff H-Beam connecting rods with ARP rod bolts. IAG Short blocks feature ACL or King Race rod and main bearings. Finally, the case halves are sealed with new OEM main/case bolts and sealant.
This Part Fits:
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2005 | Saab | 9-2X | Aero | |
| 2006 | Saab | 9-2X | Aero | |
| 2004 | Subaru | Baja | Turbo | |
| 2005 | Subaru | Baja | Turbo | |
| 2006 | Subaru | Baja | Turbo | |
| 2008 | Subaru | Forester | 2.5 XT | |
| 2008 | Subaru | Forester | Sports 2.5 XT | |
| 2004 | Subaru | Forester | XT | |
| 2010 | Subaru | Forester | XT Sports | |
| 2011 | Subaru | Forester | XT Sports | |
| 2012 | Subaru | Forester | XT Sports | |
| 2011 | Subaru | Forester | XT Touring | |
| 2012 | Subaru | Forester | XT Touring | |
| 2013 | Subaru | Forester | XT Touring | |
| 2009 | Subaru | Impreza | 2.5 GT | |
| 2010 | Subaru | Impreza | 2.5 GT | |
| 2002 | Subaru | Impreza | WRX | (Requires Mods) |
| 2003 | Subaru | Impreza | WRX | (Requires Mods) |
| 2004 | Subaru | Impreza | WRX | (Requires Mods),(Requires Mods) |
| 2005 | Subaru | Impreza | WRX | (Requires Mods),(Requires Mods) |
| 2006 | Subaru | Impreza | WRX | (Requires Mods),(Requires Mods) |
| 2007 | Subaru | Impreza | WRX | (Requires Mods),(Requires Mods) |
| 2008 | Subaru | Impreza | WRX | (Requires Mods),(Requires Mods) |
| 2009 | Subaru | Impreza | WRX | |
| 2010 | Subaru | Impreza | WRX | |
| 2011 | Subaru | Impreza | WRX | |
| 2012 | Subaru | Impreza | WRX | |
| 2013 | Subaru | Impreza | WRX | |
| 2014 | Subaru | Impreza | WRX | |
| 2010 | Subaru | Impreza | WRX GT | |
| 2009 | Subaru | Impreza | WRX Premium | |
| 2010 | Subaru | Impreza | WRX Premium | |
| 2011 | Subaru | Impreza | WRX Premium | |
| 2012 | Subaru | Impreza | WRX Premium | |
| 2010 | Subaru | Impreza | WRX SE | |
| 2004 | Subaru | Impreza | WRX STI | |
| 2005 | Subaru | Impreza | WRX STI | |
| 2006 | Subaru | Impreza | WRX STI | |
| 2007 | Subaru | Impreza | WRX STI | |
| 2008 | Subaru | Impreza | WRX STI | |
| 2009 | Subaru | Impreza | WRX STI | |
| 2010 | Subaru | Impreza | WRX STI | |
| 2011 | Subaru | Impreza | WRX STI | |
| 2012 | Subaru | Impreza | WRX STI | |
| 2013 | Subaru | Impreza | WRX STI | |
| 2014 | Subaru | Impreza | WRX STI | |
| 2010 | Subaru | Impreza | WRX STI Special Edition | |
| 2006 | Subaru | Impreza | WRX TR | |
| 2007 | Subaru | Impreza | WRX TR | |
| 2011 | Subaru | Legacy | 2.5GT | |
| 2012 | Subaru | Legacy | 2.5GT | |
| 2009 | Subaru | Legacy | GT Limited | |
| 2006 | Subaru | Legacy | GT spec.B | |
| 2007 | Subaru | Legacy | GT spec.B | |
| 2008 | Subaru | Legacy | GT spec.B | |
| 2009 | Subaru | Legacy | GT spec.B | |
| 2008 | Subaru | Outback | 2.5 XT | |
| 2005 | Subaru | Outback | XT | |
| 2006 | Subaru | Outback | XT | |
| 2007 | Subaru | Outback | XT | |
| 2008 | Subaru | Outback | XT | |
| 2005 | Subaru | Outback | XT Limited | |
| 2006 | Subaru | Outback | XT Limited | |
| 2007 | Subaru | Outback | XT Limited | |
| 2008 | Subaru | Outback | XT Limited | |
| 2009 | Subaru | Outback | XT Limited | |
| 2012 | Subaru | WRX | STI | |
| 2015 | Subaru | WRX STI | ||
| 2016 | Subaru | WRX STI | ||
| 2017 | Subaru | WRX STI | ||
| 2018 | Subaru | WRX STI | ||
| 2019 | Subaru | WRX STI | ||
| 2020 | Subaru | WRX STI | ||
| 2021 | Subaru | WRX STI |
Specifications:
| Prop 65 - Short Label | WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov |
| Prop 65 (C, R or CR) | CR |
| Prop 65 Yes/No | Yes |
| Title | IAG 950 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 950 BHP |
| Power Rating | 950 BHP |
| Compression Ratio | 8.5:1 on D Cylinder Heads (EJ255), 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket. |
| 306 | Yes |
| 9773 | H Beam |
| 4081 | No |
| 905 | 99.75 |
| 9772 | T-6 Billet Aluminum |
| 6618 | 0 |
| 9774 | Aluminum |
| 10509 | No |
| 9824 | No |
| 9703 | No |
| 458 | No |
| 1741 | All |
| 3390 | Performance |
| 9780 | No |
| 9776 | No |
| 95 | Forged Aluminum |
| 4087 | Yes |
| 9770 | Dome |
| 9777 | No |
| 10364 | No |
| 1956 | No |
| 10026 | No |
| 10575 | Full Floating |
| Description_MKT | The IAG 950 Short Block is the ultimate "weekend racer" block. Built to withstand up to 950 BHP, this is our strongest "Street" short block offering. The IAG 950 short block features +2mm IAG Spec H-Beam forged connecting rods, IAG-Spec JE Pistons with electroless nickel plated coating with H13 tool steel wrist pins, and our venerable "Fire-Lock™" head gasket system for 14mm head studs. Each IAG 950 short block is hand assembled using ACL or King rod and main bearings. This combination of parts makes the IAG 950 the perfect block for drag or road racing. The IAG 950 Short Block starts with brand new Subaru 2.5L engine case halves. Our machinists machine the assembled case halves in our Haas VF-4SS CNC mill to accept the IAG Closed Deck inserts, transforming the block into a solid deck. Next, a deck pair of deck plates are attached and the short block is bored and honed to 99.75mm in our in-house Sunnen SV-30 computer controlled cylinder hone. IAG's in-house honing process allows us to set custom piston to wall clearances to ensure quiet operation and reduced oil consumption. The Haas mill also cuts a groove at the top of each cylinder to accept the Fire-Lock™ head gasket rings and drills each head bolt hole for 14mm head studs. The modified case halves are then assembled using a new 2017+ Subaru 2.5L nitride treated STI crankshaft and IAG-Spec Tuff H-Beam connecting rods with ARP rod bolts. IAG Short blocks feature ACL or King Race rod and main bearings. Finally, the case halves are sealed with new OEM main/case bolts and sealant. |
| Description_FAB | The IAG 950 Short Block has a power output rating of 950 BHP |
| Description_FAB | All IAG Short Blocks are balanced and blueprinted |
| Description_FAB | Compression Ratio: 8.5:1 on D Cylinder Heads (EJ255) Compression Ratio: 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket. |
| Description_TLE | IAG Performance 950 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 950 BHP |
| Description_SHO | Short Block |
| Description_INV | IAG 950 EJ25 Subaru Short Block |
| Description_ASC | 950 Closed Deck EJ25 Short Block Includes: Case Halves - Converted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 99.75mm, Fire-Lock - 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, Head Studs - Machine Case for 14mm head studs - Head studs are sold separately, Pistons - IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Electroless Nickel Plated Tops & Ring area, Ring Set, .250" / .906" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins), Connecting Rods - IAG-Spec Tuff H-Beam +2mm / ARP 625+ Rod Bolts, Rod / Main Bearings - ACL or King Race bearings, Crankshaft - Standard New Subaru Nitride Treated 2017+ STI Crankshaft, Case / Main Bolts - Standard FHI Subaru case bolts |
| Description_KSW | IAG Performance |
| Description_LAB | 950 EJ25 Subaru Closed Deck Short Block -950 BHP |
| Description_DES | IAG 950 EJ25 Subaru Closed Deck Short Block -950 BHP |
| Description_APS | Saab: 9-2X 05 - 06 Aero |
| Description_EXT | IAG 950 EJ25 Subaru Closed Deck Short Block For WRX, STI, LGT, FXT - 950 BHP |
| Description_DEF | Engine Short Block |