IAG 1150 High Compression 2.5L Subaru Closed Deck Short Block For WRX STI LGT FXT - 1150 BHP
Built for high-octane fuels such as E85 and race gas, the IAG 1150 High Compression 2.5L Closed Deck Short Block is the ideal choice for high-horsepower drag racing scenarios. While suitable for street use, it’s built to dominate the track. Compared to our regular 1150 Short Block pistons with compression ratios of 8.5:1 (D Heads, EJ255) and 8.2:1 (B, V, and W Heads, EJ257), the IAG High Compression 1150 steps it up to 9.9:1 on D Heads and 9.5:1 on B, V, and W Heads, unlocking more power and efficiency needed for race applications. This high compression Subaru block includes additional features to further strengthen the OEM case halves including Stage 4 Closed Decking and pinned mains secured with ARP case hardware. Our record-setting "Fire-Lock" Head Gasket system and 14mm head studs are used to ensure a tight seal even in extreme conditions. In addition, this short block also features IAG Spec "Tri-Beam" +2mm forged connecting rods. An IAG Spec Billet Crankshaft is used to support additional oiling and prevent main bearing distortion. The upgraded block, billet crank, connecting rods, race bearings, and forged pistons are able to support additional engine load produced by the largest turbochargers and the most demanding uses including competition drag racing. The IAG 1150 High Compression Short Block includes all the premium components of our 1150 short block, upgraded with custom high compression pistons. These pistons increase the compression ratio by reducing the pistons negative cc volume, and changing from a “dish” to a “flat top” style piston, making them ideal for racing applications where power and efficiency matter most. To ensure optimal performance, this short block requires consistent use of high-octane fuels like E85 or race gas. Pump gas is suitable only during the break-in process. The IAG 1150 Short Block has a power output rating of 1150 BHP All IAG Short Blocks are balanced and blueprinted Vehicle Specific Saab: 9-2X 2005 - 2006 Subaru: Baja 2004 - 2006 Subaru: Forester 2004 - 2013 Subaru: Impreza 2002 - 2014 Subaru: Legacy 2005 - 2009 Subaru: Outback 2005 - 2009 Subaru: WRX 2012 - 2012 Subaru: WRX STI 2015 - 2021 Attributes: Brand Name: IAG Performance GTIN: 00887753987075 Assembled: Yes Assembly Lubricant Included: No Bore Diameter: 99.75 Compression Ratio: 9.9:1 on D Cylinder Heads (EJ255), 9.5:1 on B, V and W EJ257 Heads Connecting Rod Beam Style: X Beam Connecting Rod Material: T-6 Billet Aluminum Cylinder Quantity: 0 Engine Block Material: Aluminum Engine Oil Pump Included: No Engine Water Pump Included: No Flexplate Included: No Flywheel Included: No Fuel Type: All Grade Type: Performance Intake Manifold Included: No Oil Pan Included: No Piston Material: Forged Aluminum Piston Rings Included: Yes Piston Style: Flat Power Rating: 1150 BHP Timing Cover Included: No Timing Set Included: No Valve Covers Included: No Windage Tray Included: No Wrist Pin Style: Full Floating Extended Information: Country of Origin: US Emissions : 4 Life Cycle Status: Available To Order Packing Information: Quantity of Each: 1 Package UOM: EA Dimension: 21 x 17 x 21 inches Weight: 100 POUNDS PDF: