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IAG 500 EJ25 Long Block Engine w/ Stage 1 Heads
Fits - 06-14 WRX, 04-19 STI, 04-13 FXT, 05-09 LGT
The IAG Performance Hand-Built 500 Subaru EJ25 Long Block Packages are a complete, valve cover to valve cover, crate engine. These engines offer significant ease of installation for customers seeking a complete “drop-in” engine package for their Subaru WRX, STI, Forester XT or Legacy GT. The Long Blocks feature a combination of our proven IAG Performance Short Block and Cylinder Head package, 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 500 package is ideal for clients looking for a long block engine package to support up to 500 BHP applications. The IAG 500 long block features our highly popular Stage 1 short block that utilizes a brand new EJ25 Subaru case, 99.5mm IAG-Spec JE forged pistons, OEM STI Crank and STI connecting rods. The block is then paired up with our IAG Stage 1 Cylinder Head Package which features Subaru WRX STI OEM cylinder head castings and GSC valvetrain components. To complete the package, we add an 11mm ARP 2000 head stud set and all required gaskets for the final valve cover-to-valve cover assembly.
IAG’s Break-in Instructions MUST be followed, and the long block must be professionally installed for the 12 month/12,000 mile workmanship warranty to be applicable. If the previous engine experienced an internal failure then all oiling components (i.e. cooler, pump, pickup, cam gears, and solenoids, etc) as well as other necessary components as per your installer’s recommendations, must be replaced during installation.
IAG 500 Long Block Engine Includes:
Stage 1 Short Block:
- Case Halves - Brand new Subaru OEM case halves 99.5mm Stock Bore
- Pistons - IAG-Spec JE 99.5mm Forged Pistons, Ring Set, .180" Chromoly Steel Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pin)
- Connecting Rods - Early OEM (Stronger Style) STI rods
- Rod / Main Bearings - ACL or King Bearings
- Crankshaft - Standard New Subaru Nitride Treated 2017+ STI Crankshaft
- Case / Main Bolts - Standard FHI Subaru case bolts
Stage 1 Heads:
- Heads - Brand New Subaru OEM WRX STI Cylinder Head Castings
- Intake Valves - GSC 36mm (Standard) Intake Valves
- Exhaust Valves - GSC 32mm (Standard) Exhaust Valves
- Springs / Retainers - GSC Single Valve Springs & Titanium Retainers
- Guides - OEM Valve Guides
- Valve Seals - GSC Valve Stem Seals
- Lifters - OEM Lifter Buckets
- Camshafts - GSC Stage 1 Billet Camshafts
- Multi-Angle Valve Job
- Machined Cam Lobe Clearance
- Resurface
- Ultrasonic Cleaning
- Final Lash
Gaskets, Hardware & Accessories:
- Head Studs - ARP 2000 11mm Set
- Head Gaskets - OEM
- Valve Cover Gaskets - OEM
- Cam Seals - OEM
- Valve Covers - OEM
- Wrist Pin Seal, Rear Main Seal & Separator Kit
- Crankshaft Woodruff Key
Power: The IAG 500 Long Block has a power output rating of 500BHP.
*All IAG short blocks are balanced and blueprinted.
Additional Options:
IAG sells separately a Long Block Basic Installation Kit that provides all of the basic components needed to install one of our EJ25 Long Block Engine Packages in one complete kit. All fluids for initial break-in are included. - $1499.99
When purchasing just select the kit which fits your year and model.
Shipping:
All IAG Longs Blocks are crated and shipped by freight trucks which include lift gate service. A flat rate shipping charge of $399.99 applies to the lower 48 US states (Prices subject to change without notice). Please contact us for a shipping quote to Hawaii, Alaska, and Internationally.
Please review the PDF document below regarding installation, break-in procedures and warranty information.
 WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.
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AG (Standard) Short Block Warranty Limitations are as follows:
- Standard Warranty period begins on the day the engine was delivered.
- Standard Warranty applies only to short block components manufactured and assembled by IAG Performance.
- Standard Warranty does not extend to any other part of the engine, turbocharger, accessories, or vehicle in which the engine is installed, or subsequent damage to any component or part of the vehicle due to an engine failure.
- Standard Warranty coverage excludes any shipping costs incurred to return the product to our facility. If the warranty claim is denied, the client will be responsible for return shipping from our facility.
- Standard Warranty coverage excludes any and all labor expenses needed for reassembly, as well as any components (i.e. gaskets, fluids, etc.) required for reinstallation.
- Standard Warranty is only offered if the short block is professionally installed, with receipts provided.
- Standard Warranty is non-transferrable and only offered to the original purchaser of the engine.
- All parts used in the assembly of the IAG built short block carry the manufacturer’s individual component warranties. No warranty is expressed or implied for any customer-supplied components.
- Standard Warranty clients are responsible for initiating a warranty claim with IAG directly.
- The client agrees that they will be held responsible for all engine tear down costs for claims deemed insufficient and/or invalid.
- Proof of proper maintenance is the owner’s responsibility.
- Any covered repairs or replacement will not extend the warranty period.
- You must register your engine by completing the online form at https://www.iagperformance.com/warranty
Model Year & Fitment
- 2006 Subaru WRX
- 2007 Subaru WRX
- 2008 Subaru WRX
- 2009 Subaru WRX
- 2010 Subaru WRX
- 2011 Subaru WRX
- 2012 Subaru WRX
- 2013 Subaru WRX
- 2014 Subaru WRX
- 2004 Subaru STI
- 2005 Subaru STI
- 2006 Subaru STI
- 2007 Subaru STI
- 2008 Subaru STI
- 2009 Subaru STI
- 2010 Subaru STI
- 2011 Subaru STI
- 2012 Subaru STI
- 2013 Subaru STI
- 2014 Subaru STI
- 2015 Subaru STI
- 2016 Subaru STI
- 2017 Subaru STI
- 2018 Subaru STI
- 2019 Subaru STI
- 2005 Subaru Legacy GT
- 2006 Subaru Legacy GT
- 2007 Subaru Legacy GT
- 2008 Subaru Legacy GT
- 2009 Subaru Legacy GT
- 2004 Subaru Forester XT
- 2005 Subaru Forester XT
- 2006 Subaru Forester XT
- 2007 Subaru Forester XT
- 2008 Subaru Forester XT
- 2009 Subaru Forester XT
- 2010 Subaru Forester XT
- 2011 Subaru Forester XT
- 2012 Subaru Forester XT
- 2013 Subaru Forester XT
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