The IAG Performance Hand-Built Subaru EJ25 Closed Deck Long Block Engine Packages are a complete, valve cover to valve cover, crate engine. The Long Blocks feature a combination of our proven IAG Performance 1150 Closed Deck Short Block and IAG 1150 Cylinder Head packages, along with other race-proven components to complete the assembly. When paired with our Long Block Installation Packages, you 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. The IAG 1150 package is ideal for clients looking for an engine package to support up to 1150 BHP applications. The IAG 1150 Long Block features our IAG 1150 Closed Deck Short Block that utilizes a brand new EJ25 Subaru case that is converted to closed deck and is bored and honed to 99.75mm. The IAG 1150 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 a Subaru EJ25 turbocharged engine. The IAG 1150 internals includes IAG-Spec JE FSR 2618 forged pistons that have an Electroless nickel plated coating and wrist pins that are sized to .250" / .927" from H13 material. The pistons are matched to IAG-Spec Tri-Beam connecting rods with ARP 625+ rods bolts, IAG-Spec Billet crankshaft and ARP main bolts. IAG's Standard Long Block Workmanship Warranty covers your long block for 12 months or 12,000 miles. We have also teamed up with a selection of IAG Certified Installation Facilities which offer up to a 24 month/24,000 mile workmanship warranty when the engine is purchased, installed, and tuned by that IAG Certified Installer.

IAG 1150 Closed Deck EJ25 2.5L Long Block Includes: IAG 1150 Closed Deck EJ25 Short Block: Case Halves - Converted to Closed Deck from brand new OEM Subaru case halves, bored and honed to 99.75mm, 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 - IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Electroless Nickel Plated Tops & Ring area, Ring Set, .250" / .927" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins), Connecting Rods - IAG-Spec +2mm Tri-Beam Connecting Rods with ARP 625+ Rod Bolts, Rod / Main Bearings - ACL or King Race Bearings, Crank - IAG-Spec Billet Crank, Case / Main Bolts - ARP Main 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 - OEM 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.