The IAG Performance hand-built Subaru 1150 2.35L Destroked Long Block Engine package is a complete, valve cover to valve cover, crate engine. This engine provides a straightforward "drop-in" solution for those looking to upgrade their 2004-2007 Subaru STI, 2004-2005 Subaru FXT, or 2005-2006 Subaru LGT. This long block features a combination of our proven IAG EJ25 2.35L Destroked Closed Deck Short Block and IAG 1150 Cylinder Head packages, along with a full range of carefully selected high-performance components to complete the assembly. When paired with our Long Block Installation Packages, you’ll have a true plug-and-play solution to get you back on the road, FAST! All components included are BRAND NEW and there is NEVER A CORE CHARGE required. IAG’s 1150 2.35L Destroked Long Block Engine package delivers track-level power, making it ideal for high-performance applications that support up to 1150 BHP. This comprehensive Long Block package features our IAG 1150 Closed Deck Short Block that utilizes a brand new Subaru EJ25 engine case that is converted to closed deck and is bored and honed to 99.75mm. The IAG 1150 2.35L block features 14mm head stud machining, as well as our Fire-Lock™ gasket solution that is loosely derived from diesel technology where a counterbore step is machined around each cylinder bore allowing specially sized fire rings to drop into the machined area and head gasket bores. The combination of the alloy compression shims and gaskets assure maximum sealing for Subaru EJ25 turbocharged engines. The IAG 1150 internals include custom JE 99.75mm FSR 2618 pistons, JE Pro Seal Ring Set, along with .250" H13 tool steel wrist pins. Also included are custom IAG spec +2mm H-beam forged connecting rods, IAG Spec billet 75mm crankshaft, ACL Race Bearings and ARP case bolts.

IAG 1150 EJ25 2.35L Long Block Includes: IAG 1150 EJ25 2.35L Short Block: Case Halves -Brand new Subaru OEM case halves, Pinned Mains - Machine case for 9.5mm pinned mains and lined honed, 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 -Machined for 14mm Head Studs, Pistons -JE 99.75mm FSR 2618 Custom Pistons and .240" H13 Tool Steel Wrist Pins with JE Pro Seal Ring Set, Connecting Rods -Custom IAG Spec +2mm Tri-Beam Forged Connecting Rods with ARP 625+ Rod Bolts, Rod / Main Bearings -ACL Race Bearings, Crank -IAG Spec Billet 75mm Crankshaft, Case / Main Bolts -ARP Case Bolts.. IAG 1150 Fully CNC Ported Cylinder Heads: Heads - Brand New Subaru OEM WRX STI Cylinder Head Castings, Machine Porting - CNC Ported Intake and Exhaust Runners, Intake Valves - Ferrea 37mm (+1mm) Comp Plus Intake Valves, Exhaust Valves - Ferrea 33mm (+1mm) Comp Plus Exhaust Valves, Springs / Retainers - Ferrea Dual Valve Springs & Titanium Retainers, Keepers - Ferrea Valve Keepers, Guides - GSC Manganese Bronze Valve Guides, Valve Seals - GSC Valve Stem Seals, Lifters - Kelford DLC Coated Lifter Buckets, Camshafts - GSC Stage 3 Billet Camshafts, Multi-Angle Valve Job, Machined Cam Lobe Clearance, Drilled For 14mm Heads Studs, Resurface, Ultrasonic Cleaning, Final Lash. Gaskets, Hardware & Accessories: Head Studs - IAG / ARP 14mm Set, Head Gaskets - IAG Fire-Lock™, Valve Cover Gaskets - OEM, Cam Seals - OEM, Valve Covers - OEM, Wrist Pin Seal, Rear Main Seal & Separator Kit, Crankshaft Woodruff Key.
,Power: The IAG 1150 Long Block has a power output rating of 1150BHP.
,All IAG short blocks are balanced and blueprinted.