Name: IAG 550 Long Block Engine w/ IAG 550 Heads for 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT
Brand: IAG Performance
SKU: IAG-ENG-L550-OPT
Price: 9799.99 USD
Availability: InStock

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Description
Vehicles
Shipping & Returns
Warranty

Description

IAG 550 LONG BLOCK ENGINE WITH IAG 550 HEADS FOR 02-14 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT

IAG 550 Long Block for EJ20/EJ25 Subaru WRX STI

A "DROP-IN" SOLUTION

The IAG Performance Hand-Built 550 Subaru EJ25 Long Block Packages are a complete, valve cover to valve cover, crate engine. These long block 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 550 Performance Short Block and IAG 550 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.

BUILT WITH 100% NEW COMPONENTS

The IAG 550 package is ideal for clients looking for a long block engine package to support up to 550 BHP applications. The IAG 550 long block features our highly popular IAG 550 Short Block that utilizes a brand new EJ25 Subaru case, 99.5mm IAG-Spec JE forged pistons, IAG Spec H-Beam connecting rods and OEM STI Crank. The block is then paired up with our IAG 550 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 550 EJ25 2.5L SUBARU SHORT BLOCK

Stage 2 Short Block H-Beam Connecting Rods

DESIGNED FOR STRENGTH

The IAG 550 Short Block is designed for modified EJ25 Subarus that need a stronger short block to support increased cylinder pressures created by additional boost pressure. The IAG 550 short block features IAG Spec H-Beam forged connecting rods. The upgraded connecting rods and race bearings are able to support additional engine load produced by larger turbochargers or increased boost which the OEM STI rods found in the Stock short blocks cannot support reliably.

BUILT WITH 100% NEW COMPONENTS

Each IAG 550 Short Block starts with brand new EJ25 Subaru 2.5L, 99.5mm stock bore engine case halves as standard. The case haves are carefullly measured and assembled using a new 2017+ Subaru 2.5L nitride treated STI crankshaft, which is matched to ACL or King race main bearings. The IAG 550 Short Block features IAG Spec H-Beam Connecting Rods with ARP2000 rod bolts, along with ACL or King race rod bearings. The case halves are sealed with new OEM main case bolts and sealant. Finally, IAG Spec JE 99.5mm Forged Pistons are carefully selected, measured, and installed to finish off the short block.

FORGED PISTONS, DESIGNED FOR BOOST

Each IAG 550 Short Block features IAG Spec JE 99.5mm Forged Pistons. These 2618 T6 Alloy high-strength pistons have been specifically designed to support increased cylinder pressures which come with more boost. This is accomplished by using an asymmetrical skirt design instead of the traditional full-round skirt, also this reduces weight significantly. Featuring smooth flowing radii on the domes and dishes, the design promotes excellent flame travel. The pistons are secured to the rods with .905 x 2.250" x .180" wall carbon steel wrist pins with Tru Arc locks.

IAG 550 STREET CYLINDER HEADS PACKAGE FOR 02-14 WRX, 04-21 STI, 05-09 LGT, 04-13 FXT

ENTRY-LEVEL STOCK REPLACEMENT HEADS

The IAG 550 Cylinder Heads are designed to function as an entry-level replacement for stock OEM heads. If your engine has suffered a catastrophic failure which requires replacement of your cylinder heads, or if you don't have OEM heads to start with, the IAG 550 Cylinder Heads are a perfect solution. These heads also work great for cars with basic bolt-on parts up to 550 BHP. These heads include upgraded GSC standard size valves, GSC Viton Valve Stem Seals, IAG Stage 1 Valve Springs with Titanium Retainers, and OEM Keepers. GSC S1 Camshafts are available with OEM valve lifter buckets.

BUILT WITH 100% NEW COMPONENTS

Each IAG 550 Cylinder Head Set starts with new OEM castings from Subaru of America. The first step is to select your Year and Model of vehicle so that we may provide you with the right castings to fit your project. Next, you'll select whether or not you want to include our optional GSC camshaft package. If selected, these heads will include new GSC S1 Camshafts and OEM Lifter Buckets for valve adjustment.

The bare castings are visually inspected and then fixtured into our in-house Centroid 5-axis CNC Machine. In the Centroid, the heads undergo a cam clearance machining process which removes material from the lifter area where larger lift and duration cam profiles are known to contact the castings. (Just in case you want to go bigger later.) Then the heads are fixtured in our Newen Valve Guide and Seat Machine to cut all intake and exhaust seats with a multi-angle valve job that suits the flow characteristics of GSC's standard size 36mm Intake and 32mm Exhaust valves. At this point, the heads' decks are resurfaced using our TS-3000 BlockMate, which cuts the aluminum to a smooth, even finish. Next, the heads are ultrasonically cleaned to remove debris and oils from the machining process. Finally, the heads are reassembled using GSC Stainless Intake and Exhaust Valves, GSC Viton stem seals, IAG-Stage 1 Valve Springs with Titanium Retainers, and OEM Valve Keepers.

Newen Seat and Guide Machine Machining IAG Cylinder Heads

Centroid 560A Machining IAG Subaru Cylinder Heads

GSC S1 CAMSHAFT AND LIFTER BUCKET PACKAGE

The included GSC Power-Division billet S1 camshafts for your IAG 550 Head Package will not drop any low end power, and will create more power and torque across the entire RPM range. These are perfect for stock frame upgraded turbos or up to 500 WHP upgrades. Along with the camshafts we'll include all new OEM valve lifter buckets and set final lash.

COMPLETE TIMING COMPONENT KITS AVAILABLE FOR EVEN EASIER INSTALLATION

Save time and money by adding an IAG Performance Complete Timing Component Kit to your order. For optimal performance of your modified IAG long block, it’s important to use high-quality, reliable components that ensure precise timing to protect your investment. Available in Street or Comp versions each kit includes our high-strength black Kevlar belt, IAG billet aluminum Belt Guide, IAG Oil pump, timing tensioner, idlers, cam bolts, and even the inner and outer timing covers with all hardware. Compatible with all EJ Subaru long blocks, this kit provides all the correct and necessary parts for your swap at a discounted package rate.

Not sure about installing the timing belt and components on your new long block yourself? Let our experts do it for you. Our highly trained technicians have years of experience installing these timing systems, and have performed thousands of installations. Did you know that you can easily cause permanent and catastrophic damage to your valves if the timing procedure is performed incorrectly? Achieve peace of mind in knowing that our experts have set the timing perfectly, making the IAG Long Blocks the easy solution for reliable power.

What's Inside:

IAG 550 EJ25 2.5L LONG BLOCK INCLUDES

IAG 550 EJ25 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 - IAG Spec H-Beam Rods w/ ARP2000 Rod Bolts
Rod / Main Bearings - ACL or King Bearings
Crankshaft - Standard New Subaru Nitride Treated 2017+ STI Crankshaft
Case / Main Bolts - Standard FHI Subaru case bolts

IAG 550 Cylinder 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 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 Rating:

Power: The IAG 550 Long Block has a power output rating of 550BHP.

Long Block Installation Kit

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.
When purchasing just select the kit which fits your year and model. Click Here To Purchase an Install Kit

During installation your mechanic will need to swap over the external components from your engine such as the intake and exhaust manifolds, turbocharger, fuel pump, injectors, etc.

Installation Instructions:

Please review the PDF document below regarding installation, break-in procedures and warranty information.

PDF After Sale Document - Contains Shipping, Engine Care and Warranty Information

Have Questions?

Our Experts Are Here to Help

Our Build Advisors and Customer Support staff can assist you with any questions or concerns about our long blocks. We are here to help you decide which IAG products best fit your performance goals and budget. Just click the button below for assistance.

Quality Guaranteed

Available 24 Month/24,000 Mile Warranty*

We stand behind every hand-built engine we produce. 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.

LEARN MORE

Vehicles

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
2020 Subaru STI
2021 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

Shipping & Returns

SHIPPING

FREE SHIPPING on orders of $250 or more* Simply look for the logo to enjoy free shipping on selected items throughout the store. Oversized packages and freight shipments do not qualify for free shipping. If the items in your order which qualify for 'Free Shipping' total $250 or more, your order ships FREE! Free shipping is only available to the continental United States also referred to as the “lower 48 states”.

Shipping Policy: All products sold on the shopping cart are shipped by UPS or USPS. All packages include shipping insurance in case they are lost or damaged. USPS requires signature confirmation on all insured orders over $200.00. USPS shipping times are estimated and not guaranteed. UPS tracking numbers are automatically generated when a package ships and the number is sent to the email address you provided. If a package contents is damaged during shipping please notify the shipping driver and file a claim with the shipper. You have 14 days to inspect your shipment and contents. After that period of time, IAG is no longer responsible for missing items. You have 30 days to report any damaged or incorrect items, after that period of time IAG is no longer responsible for returns or exchanges. You can contact us by Email or call 410-840-3555 for assistance. *International orders are subject to customs charges, duties or fees. Please check with your local customs office before ordering. IAG is not responsible for international customs charges, duties or brokerage fees.

Drop Shipping: Some items require drop shipping to complete an order. These products are shipped from manufacturer or distributor warehouses across the country. In some cases, this may speed up delivery time. In other cases, it could add 1-3 days to the delivery time. If you have a question regarding an order please contact our sales desk at 410-840-3555.

Order Processing: Orders placed after 3PM EST may not be processed the same day. Order processing may take 24-48 hours. USPS orders placed after 10am EST will ship the following business day if the items are in stock

RETURNS

How do I return an item?

You have 14 days to inspect your shipment and contents. After that period, IAG is no longer responsible for missing items. You have 30 days to report any damaged or incorrect items, after that period IAG is no longer responsible for returns or exchanges. All stocking products are subject to a 30 Day return policy. The item(s), when approved for return, are subject to a 20 percent restocking fee. Canceled orders may be subject to a 20 percent cancellation fee. All product returns require a return authorization number before being shipped back to IAG or the manufacturer. An “RMA” number is obtained by calling the IAG Support Desk at 410-840-3555 or emailing support@iagperformance.com. Some products may require shipping back to the manufacturer for inspection before a return or exchange may be processed. Some products may not be able to be returned. Products that have been modified or installed are not eligible for return. There are no returns or cancellations for Special Order/Made to Order items and Electrical Components (including the COBB Accessport). Items returned after the 30 Day return period without an RMA will be refused. Canceled service appointments with deposits are non-refundable.

Refunds take 30 days or less. Payments made by Credit Card or PayPal are returned back to the original account used during the transaction. There are no cash returns; we will issue a business check for the return of funds. Refunds are decided by the management and not by sales staff. Canceled service appointments with deposits are non-refundable.

Warranty

IAG Performance Product Warranty (Excluding - Short Blocks / Long Blocks)

This limited warranty gives you specific legal rights and you may also have other rights, which vary from state to state. We limit the duration and remedies of all implied warranties, including, without limitation, the warranties of merchantability and fitness for a particular purpose to the duration of this express limited warranty. Some states do not allow limitations on how long an implied warranty lasts. The remedies described below are your sole and exclusive remedies and our entire liability for any breach of this limited warranty. Our liability shall under no circumstances exceed the actual amount paid by you for the product, nor shall we under any circumstances be liable for any consequential, incidental, special or punitive damages or losses, whether direct or indirect.

This warranty covers defects in materials and workmanship of your IAG Performance Product for 12 Months or 12,000 Miles from the date of receipt.

IAG will repair any IAG Manufactured Product that proves to be defective in materials or workmanship within the warranty period. If a repair is not possible, we will either replace your Product with a new Product of similar composition and price, or refund the full purchase price of your Product, at our sole discretion. There is no charge for inspection but the buyer is responsible for shipping charges.

IAG Performance Engine Warranty

For more information concerning our engine warranty please visit IAG Performance Engine Warranty Page

Other Manufacturer Products:

Products not manufactured by IAG are subject to the individual manufacturer warranties which may apply. If you have questions concerning the fitment, appearance, or performance of your item, please contact a member of our customer support team for assistance.

Our customer service team is happy to assist you with the products purchased from IAG Performance. Our support associates can help you with installation support, troubleshooting advice, and help to identify possible manufacturer defects.

For products that are found to have defects, our support department can provide the contact information for the manufacturer to arrange a warranty inspection and, if applicable, any necessary repairs or replacement shipments.

You may also contact the manufacturer directly for information regarding product eligibility and specific terms and conditions of warranty coverage.