IAG 950 EJ25 Subaru Closed Deck Short Block For WRX STI LGT FXT - 950 BHP

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. The IAG 950 Short Block has a power output rating of 950 BHP All IAG Short Blocks are balanced and blueprinted 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. Vehicle Specific Saab: 9-2X 2005 - 2006 Subaru: Baja 2004 - 2006 Subaru: Forester 2004 - 2013 Subaru: Impreza 2002 - 2014 Subaru: Legacy 2005 - 2012 Subaru: Outback 2005 - 2009 Subaru: WRX 2012 - 2012 Subaru: WRX STI 2015 - 2021 Attributes: Brand Name: IAG Performance GTIN: 00887753904133 Assembled: Yes Assembly Lubricant Included: No Bore Diameter: 99.75 Compression Ratio: 8.5:1 on D Cylinder Heads (EJ255), 8.2:1 on B, V and W EJ257 Heads with standard thickness gasket. Connecting Rod Beam Style: H 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: Dome Power Rating: 950 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 : Emissions Compliance Exempt 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: