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Description
Vehicles
Shipping & Returns
Warranty

Here it is! Introducing the AMS Performance Subaru EJ WRX/STI Intake Manifold. The manifold was designed with performance and big HP custom setups in mind. With the level of builds this manifold will be used in, there will be some customizing required. This AMS Subaru EJ Intake Manifold offers more than just top end power. This manifold gives you an amazingly wide power-band with a huge jump in power whenever you are in boost. This equates to greatly improved lap times on the road course and the confidence to leave any opponent in your dust when on the drag strip!

02-05 Subaru WRX w/ EJ20 (Requires adapter to use WRX style drive by cable throttle body)
06-07 Subaru WRX w/ EJ25, 08-14 Subaru WRX w/ EJ25 (Requires using STI style drive by wire throttle body)
04-Current Subaru STI w/ EJ25 (2008+ STI may require mild clearancing of A/C compressor line)
Will fit various Legacy and Forester EJ25 applications with proper throttle body usage and custom fitting

This product is designed for installation on a race-only vehicle, defined as a vehicle that is used exclusively for competition and that cannot be licensed or registered for use on the public roads and highways within the United States. This product is not available for sale on emissions-controlled vehicles within the United States without a completed AMS Race Waiver form. International users outside of the United States should act in accordance with their local laws and regulations.

Stay Ahead Of Your Competition With The AMS Subaru WRX / STI Intake Manifold!

The AMS Subaru Intake Manifold was designed to outperform the competition. We referenced many modern design examples and engineering studies to bring you the best intake manifold available for the Subaru EJ20 and EJ25 WRX & STI. After extensive testing we ended up with a manifold that makes more power than anything else currently available on the market!

Benefits

4.5 Liter Plenum Volume
13” Equal Length Intake Runners (Measured from Face of Bellhorn to End of Runner)
2.5” (63.5mm) Intake Runner Diameter (ID of Bellhorn)
Bellhorn OD 3.8” (96.7mm)
Increased Port Size at Cylinder Heads Allow Matching to Larger Hand Ported or CNC Ported Cylinder Heads
Available in Standard or Reversed Configuration
Throttle Body Opening Accepts Larger Throttle Bodies up to 2.625” (66.675mm) or 70mm with mild porting
Available in 4 Configurations (Standard, Standard Coated, Reversed, and Reversed Coated

Product Notes

Due to the large variety of rotated turbo kits on the market, we cannot guarantee fitment with every brand. Depending on the turbo location and sizing, interference with the cylinder 3 intake runner is possible.
Some port matching may be required when used in conjunction with CNC or hand ported cylinder heads.
The intake manifold is available with a standard or optional reverse throttle body orientation, allowing for more direct intercooler pipe routing.
Larger throttle bodies can be used with proper modifications (Up to 70mm with minor porting) (Larger throttle bodies may also require adapter flanges)
The intake manifold is flanged for 04+ STI drive by wire throttle bodies, but cable throttle bodies can be used with custom fitting and flange adapter.
Standard configuration intercooler piping will need mild custom fabrication due to placement of throttle body.
Reversed configuration requires the relocation of the alternator and removal of the A/C compressor.
Installation is not a direct bolt on and will require custom intercooler piping.
The intake manifold is designed to use a common Subaru aftermarket top feed injector size. (48mm overall length / 11mm inlet – standard Subaru rail size / 14mm outlet) We recommend the use of
Injector Dynamics brand injectors.
Standard Subaru style injectors cannot be used. (Side Feeds, Stock STI Style Injectors)
Not compatible with side feed to top feed conversion rails
Requires aftermarket rails and lines, will not fit with stock
Not compatible with top mount intercoolers.
Not directly compatible with mounting the factory upper coolant reservoir. Custom bracketry will need to be fabricated to mount.
The bottom of the center plenum features four 1/8″ and one 1/4″ NPT ports for vacuum accessories. 2008+ STI may require mild clearancing of A/C compressor line

Engineered To Be The Best

For the Subaru EJ Intake Manifold the plan was simple, take our years of engineering experience and design the best intake manifold available. Designed, prototyped, and tested in house by our team of Engineers, the AMS Subaru EJ Intake Manifold was created to be the best unit available on the market. By casting this manifold it is not only stronger, but it allowed us to optimize the power output by giving us the freedom to sculpt the interior geometry for maximum efficiency and airflow.

Vehicles

This Part Fits:

Year	Make	Model	Submodel
2002-2005	Subaru	Impreza	WRX
2006-2014	Subaru	Impreza	WRX
2004-2014	Subaru	Impreza	WRX STI
2015-2021	Subaru	WRX STI	Base
2015	Subaru	WRX STI	Launch Edition
2015-2021	Subaru	WRX STI	Limited
2016	Subaru	WRX STI	Series.HyperBlue

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.