IAG / Crest CNC Billet Aluminum EJ25 Subaru Case Halves For WRX, STI, Forester XT & Legacy GT
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IAG Performance
IAG / Crest CNC Billet Aluminum EJ25 Subaru Case Halves For WRX, STI, Forester XT & Legacy GT
- SKU:
- IAG-ENG-CX25
- UPC:
- 887753903983
- Availability:
- Built in the Order Received
- Proposition 65:
P65 WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov.
IAG / Crest CNC Billet Aluminum EJ25 Subaru Case Halves For WRX, STI, Forester XT & Legacy GT
IAG / CREST CNC BILLET ALUMINUM EJ25 SUBARU CASE HALVES FOR WRX, STI, FORESTER XT & LEGACY GT
CNC BILLET ALUMINUM EJ25 CASE HALVES
The IAG Performance / Crest CNC Billet Aluminum EJ25 Case Halves are the same premium-grade case halves used in our cutting-edge Stage X Billet Short Block, which has revolutionized the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness that exists in max-power builds. The EJ25 Case Halves are engineered to eliminate case flex in high-power EJ builds, making it possible to reliably run at a power output rating of 1150+BHP. With features like radiused coolant and oil galleries to improve flow, a 4-bolt bottom end for added strength, and replaceable iron sleeves that make rebuilds easier, these case halves offer a rock-solid foundation to build upon.
SOLID FOUNDATION BY CREST CNC
The IAG Performance / Crest CNC Billet Aluminum EJ25 Case Halves are machined by Crest CNC (formerly Willall), renowned for their precision-machined billet aluminum engine blocks and components. With Crest’s proven track record of producing blocks that endure the rigors of high-output engines, these case halves provide an unbeatable foundation for those pushing the limits of performance.
NEXT-LEVEL INNOVATION
The IAG Performance / Crest CNC Billet Aluminum EJ25 Case Halves are engineered with numerous advanced features that enhance strength and reliability. The halves are precision machined from solid 6061-T6 aerospace aluminum billet and reinforced with Darton Ductile Iron Sleeves. An advanced hard anodized coating protects against marking and staining, while their enhanced strength and stiffness far surpass the stock case, making them an excellent choice for high-power builds. Additionally, increased material thickness has been strategically added in all known weak points, particularly around the head studs and bottom end location, enhancing the block's resilience.
Additional innovations featured in the IAG / Crest CNC Billet Aluminum EJ25 Case Halves include a unique 4-bolt bottom end design that provides extra strength and stability. The case's bolt threads are rolled, rather than conventionally cut, ensuring a solid grip on hardware. The halves also maintain full cooling system operations, while incorporating the use of radiused coolant and oil galleries for improved flow and less foaming and/or turbulence. Finally, the Case Halves feature compatibility with all factory engine bay ancillaries (i.e., AC/PS/etc.).
OPTIONAL IAG FIRE-LOCK SYSTEM: NO MORE HEAD GASKET WORRIES
The IAG Performance / Crest CNC Billet Aluminum EJ25 Case Halves can be machined to accommodate the optional IAG Fire-Lock system. Our proprietary "Fire-Lock" receiver groove machining is designed for compatibility with our IAG "Fire-Lock" Head Gaskets. This system has been proven in our record setting race cars to be the strongest Subaru head gasket system ever produced. To achieve these results, our engineers separated the combustion chamber sealing from the fluid sealing aspects of the head gaskets. Our machinists carefully machine a lip at the top of each cylinder to accept the "Fire-Lock" ring. With the ring locked in place, it stands firmly above the deck, providing a superior seal. The separate gasket bodies take care of sealing oil and coolant passages, while keeping them out of the combustion chamber. 14mm Head studs hold the assembly together. (IAG "Fire-Lock" System, Head Gaskets and Head Studs Sold Separately).
What's Inside:
IAG / Crest CNC Billet Aluminum EJ25 Subaru Case Includes:
-
(x2) Crest Billet / Sleeved Case Halves
IAG / Crest CNC Billet Aluminum EJ25 Subaru Case Features:
- Machined from solid billet 6061-T6 Aerospace grade aluminum
- Darton Ductile iron sleeves
- Increased material thickness in all known weak points (around head studs, bottom end location)
- Unique 4 bolt bottom end strengthening
- Threads are rolled into the block rather than conventionally cut for much greater strength
- Full cooling system operation
- Radiused coolant and oil galleries for improved flow and less foaming/turbulence
- Fits all factory engine bay ancillaries (i.e. AC/PS/etc.)
- Multiple Times stiffer and stronger than the stock case
- Precision machined for a superior surface finish
- Hard anodized to avoid marking or straining
- ARP Case Bolts & Crest Hardware
Additional Options:
- Bore & Hone: Bore & Hone to customer specification
- Fire-Lock: Fire-Lock machine the deck surface
- Head Studs: IAG / ARP 14mm Head Studs, nuts, and washers - *14mm head studs are required for this block
- Machining Deck: Machine head gasket deck surface
Minimum Requirements To Build & Assemble:
- 14mm Head Studs (Sold separately)
- Internal components (Pistons, Rods, Bearings, Crank, All sold separately).
- Decking head gasket surface required
*Attention: Special note about using ARP Case Bolts- IAG uses specific torque specs and procedures please refer to the guide provided.
Power Rating:
Power: The IAG 800 Closed Deck Case has a power output rating of 800 BHP
Installation Instructions:
*Attention: Special note about using ARP Case Bolts- IAG uses specific torque specs and procedures please refer to the guide provided.
Model Year & Fitment
- 2002 Subaru WRX Requires Mods
- 2003 Subaru WRX Requires Mods
- 2004 Subaru WRX Requires Mods
- 2005 Subaru WRX Requires Mods
- 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
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.
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.
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