IAG 800 CNC Pocket Ported Competition Cylinder Heads Package for 2015-21 WRX
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IAG Performance
IAG 800 CNC Pocket Ported Competition Cylinder Heads Package for 2015-21 WRX
- SKU:
- IAG-ENG-H800-OPT
- Availability:
- Usually Ships in 10 to 11 Weeks
- Proposition 65:
P65 WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov.
IAG 800 CNC Pocket Ported Competition Cylinder Heads Package for 2015-21 WRX
IAG 800 POCKET PORTED COMPETITION CYLINDER HEADS PACKAGE FOR 2015-2021 SUBARU WRX
DESIGNED WITH THE WEEKEND RACER IN MIND
The IAG 800 CNC Pocket Ported Competition Cylinder Heads are designed with the weekend racer in mind. These CNC pocket ported heads provide a significant upgrade in flow over the IAG 600 heads. These heads work great for cars with some race track duty (road, rally, auto-x, drag) and are designed to support up to 800 BHP with supporting mods. These heads include upgraded GSC +1mm Stainless Steel Valves, GSC Viton Valve Stem Seals, Upgraded GSC Valve Guides, Kelford Dual Valve Springs with Titanium Retainers, and OEM Keepers. FA20 Heads are configured differently from their EJ counterparts. In FA20 heads the casting is split into two parts, the "lower" and the "cam towers." As the name suggests, the "Cam Towers" hold the camshafts to the cylinder head. Kelford "A" cams are available with IAG 800 Cylinder Heads. When Kelford cams are chosen we also include new OEM cam towers, rockers, pivots, and valve shim caps.
BUILT WITH 100% NEW COMPONENTS
Each IAG 800 FA20 DIT Cylinder Head Set starts with new OEM castings from Subaru of America. Next, you'll select whether or not you want to include our optional Kelford camshaft package. If selected, these heads will include Kelford "A" camshafts as well as new OEM cam towers, rockers, pivots, and valve shim caps.
The bare castings are visually inspected and the OEM guides are pressed out. The heads are then fixtured into our in-house Centroid 5-axis CNC Machine, one of the most advanced precision engine machining equipment in the world. The Centroid CNC performs a "pocket port" of the area under the valves, enlarging and blending the opening under the valves. The benefit of CNC porting is not only an efficient way of machining the heads it also offers consistent port results that are hard to achieve by hand. Once the Centroid completes the porting process the heads are drilled to fit larger 1/2" or 14mm head studs which are commonly used in high horsepower builds. Next, the OEM press-fit freeze plugs are removed, to avoid a common known failure in which they loosen and leak coolant into the engine oil as well as externally. To eliminate this problem each head is tapped and threaded plugs are installed. At this point, GSC Manganese-Bronze valve guides that are shaped to improve airflow are pressed into place then all the new intake and exhaust guides are diamond-honed in our honing station. The heads are then 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 +1mm valves. The heads decks are then resurfaced using our TS-3000 BlockMate that cuts the aluminum to a smooth even finish. To remove debris and oils from the machining process, the heads are ultrasonically cleaned. Finally, the heads are reassembled using Kelford Dual Cylindrical Valve Springs and Retainers along with GSC Viton stem seals.
WHAT IS A POCKET PORT?
Pocket porting is enlarging and blending the area under the valve seat. This is one of the most critical areas to get right in any porting job. Luckily, our Centroid 5 axis cylinder head porting machine gets it perfect every time. The area about 1" under the valve is enlarged and blended to ensure a smooth transition and increase power. The rest of the port is left alone because additional volume is not required at these power levels, and can even hurt velocity if there's not enough airflow.
OPTIONAL KELFORD "A" CAMSHAFT AND LIFTER PACKAGE
If you're planning for more power you'll want to select these Kelford "A" camshafts for your IAG 800 Head Package. These cams are perfect for those seeking more power for their modified FA20 WRX. These cams will support up to 800 BHP. Along with the camshafts we'll include all new OEM cam towers, rockers, pivots, and valve shim caps. Finally, we'll take care of setting bench lash using our specially designed fixture. (FINAL LASH SHOULD BE CHECKED AND ADJUSTED ONCE HEADS ARE INSTALLED)
KEEP COOLANT OUT OF YOUR OIL WITH IAG'S FA20 CASTING PLUG MODIFICATION SERVICE
Subaru made some interesting cost-cutting decisions when developing the FA20 cylinder heads. One such measure was the use of pressed in casting or "freeze" plugs on the head castings. These plugs are designed to cover the holes left during the casting process and contain the coolant inside the cylinder head. Unfortunately, the pressed in plugs have a tendency to become loose, and if they pop out you'll have oil and coolant mixing inside your timing cover and causing a huge mess and possibly costing you a new engine. We've developed a solution for this problem which involves carefully threading the opening for the casting plugs and installing new, threaded plugs that wont pop out. This is a must when going for higher horsepower in your FA20 equipped WRX.
What's Inside:
IAG 800 CNC Pocket Ported FA20 DIT Cylinder Heads Package Includes:
- (x2) Brand New Subaru OEM AW20 FA20 WRX DIT Cylinder Head Castings
- (x8) GSC 35mm (+1mm) Intake Valves
- (x8) GSC 30mm (+1mm) Exhaust Valves
- (x16) Kelford Dual Cylindrical Valve Springs & Retainers
- (x16) GSC Manganese-Bronze Valve Guides
- (x16) GSC Valve Stem Seals
- IAG Performance CNC Pocket Porting
- Multi-Angle Valve Job
- Drilling for compatibility with ½" or 14mm Head Studs
- Threaded Coolant Plug Upgrade
- Resurface
- Ultrasonic Cleaning
Optional Camshaft Package Also Includes:
- Kelford "A" 272 Camshafts
- (x2) OEM Cam Towers & Hardware
- (x16) OEM Rocker Pivots
- (x16) OEM Lifters
- (x16) OEM Valve Lash Caps
- Bench Valve Lash Service (Final Lash Should be Checked and Adjusted Once Heads are Installed)
Power Rating:
Power: The IAG 800 Cylinder Head Package has a power output rating of 800 BHP
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
- For use with stock cams or mild duration cams
- Assembly and professional installation recommended.
- Workmanship/parts warranty will only be available for professionally installed cylinder heads.
Quality Guaranteed
Available 24 Month/24,000 Mile Warranty*
We stand behind every hand-built engine we produce. IAG's Standard Short Block Workmanship Warranty covers your short 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.
Model Year & Fitment
- 2015 Subaru WRX
- 2016 Subaru WRX
- 2017 Subaru WRX
- 2018 Subaru WRX
- 2019 Subaru WRX
- 2020 Subaru WRX
- 2021 Subaru WRX
*Assembly and professional installation recommended. Workmanship/parts warranty will only be available for professionally installed cylinder heads.
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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