CALL US (855) 998-8726 EJ Intake Manifold - Standard Rotation Uncoated (AMS.31.08.0001-1)
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AMS Performance Subaru EJ Intake Manifold - Standard Rotation, Uncoated (AMS.31.08.0001-1)
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 ...
AMS PerformanceAMS Performance Subaru EJ Intake Manifold - Standa
AMS Performance Subaru EJ Intake Manifold - Standa
AMS Performance Subaru EJ Intake Manifold - Sta-2
AMS Performance Subaru EJ Intake Manifold - Sta-3
AMS Performance Subaru EJ Intake Manifold - Sta-4
AMS Performance Subaru EJ Intake Manifold - StandaAMS Performance Subaru EJ Intake Manifold - Sta-2AMS Performance Subaru EJ Intake Manifold - Sta-3AMS Performance Subaru EJ Intake Manifold - Sta-4

AMS Performance

AMS Performance Subaru EJ Intake Manifold - Standard Rotation, Uncoated (AMS.31.08.0001-1)

$1,230.95

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Details
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 ...
  • 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
  • For more questions about this product, please Contact Us
Description

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.

By utilizing Solidworks© & CFD (computational fluid dynamics) software we started with an extremely large plenum size of 4.5L for the ultimate top-end power. We also designed CNC machined bellhorns which act as internal velocity stacks and allow for a broad power curve and high RPM horsepower capabilities. This allowed us to optimize massive 2.5″ tapered runners and matched cylinder port angles to minimize turbulence and maximize power output. The 13″ length of the runners allow for a smooth taper in cross section reduction, giving the AMS Subaru EJ Intake Manifold exceptional flow.

Unmatched power gains and excellent response

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!

Be the guy to beat, order your AMS Subaru EJ WRX / STI Intake Manifold now! 

Applications

  • 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
Application List
ImageSKU / Part NoApplicationDetailPriceAdd to Cart
 AMS.31.08.0001-1Subaru Impreza (2002-2005) - WRX2.0L 4H 1994 | Turbocharged$1,230.95BUY
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 AMS.31.08.0001-1Subaru Impreza (2004-2007) - WRX STI2.5L 4H 2458 | Turbocharged$1,230.95BUY
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 AMS.31.08.0001-1Subaru Impreza (2006-2007) - WRX2.5L 4H 2458 | Turbocharged$1,230.95BUY
+ -
 AMS.31.08.0001-1Subaru Impreza (2008-2014) - WRX2.5L 4H 2458 | Turbocharged$1,230.95BUY
+ -
 AMS.31.08.0001-1Subaru Impreza (2008-2014) - WRX STI2.5L 4H 2458 | Turbocharged$1,230.95BUY
+ -
 AMS.31.08.0001-1Subaru WRX (2012-2014)2.5L 4H 2458 | Turbocharged$1,230.95BUY
+ -
 AMS.31.08.0001-1Subaru WRX (2015-2016)2.5L 4H 2458 | Turbocharged$1,230.95BUY
+ -
 AMS.31.08.0001-1Subaru WRX STI (2013-2021)2.5L 4H 2458 | Turbocharged$1,230.95BUY
+ -
Return Policy

At JM Auto Racing we make returns and other client services as easy as possible. Our mission is to provide you with the best products and the best service in the automotive industry. We understand that sometimes, clients change their minds about products that they order or simply do not need them anymore. We also know that clients are cautious about terms and conditions since they are often tricky and misleading. Our goal is to make the return or exchange process trustworthy and as simple as 1-2-3.

Returns & Exchanges
If you are not satisfied with your purchase for any reason, we will be happy to accept a return for a refund or exchange on products in new/unused condition within 30 days of delivery. For orders placed during the holiday season from November 15th to December 31st, the return period is extended to 60 days. The following rules apply:

  • All returns and exchanges must be made via our Return Procedure with a valid & signed RMA form.
  • Returns will have a flat 15% restocking fee.
  • Product(s) must be in new condition and in the original packaging (please do not assemble, install, or modify the product in any way). In the event of fitment, flaw or defect pictures may be necessary to complete your request.
  • Any product that was used or fully/partially installed is non-returnable.
  • In some cases, return of the physical product may not be required. For these products, instructions will be provided on how to process a field destroy or dispose of the original item.
  • The few exceptions for items that cannot be returned include:
    • Items classified as “special order” or “made to order”
    • Custom Wheels & Tires Packages
    • Electronics
    • Any non-EPA compliant product including but non limited to catless test pipes, downpipes, headers and high flow cats. We will try to make as many accomadations as possible however a 25% restocking fee will apply. Please contact us to learn more.
  • To start your return please click HERE

Cancellations
We all know that things happen a people change their mind as soon as the purchase things. We take pride in how quickly we get things out the door and with 4 warehouses to ship from plus stock owned at our manufacturers, that speed is always increasing. This is why we only except full cancellations within 30 minutes of placing an in stock order. This helps us ensure your package gets out on the truck immediately or can be flagged before it goes through the packaging process. For orders that are not in stock or special order, we allow 24 hours. Cancellations can be done online by following the instructions found HERE or by emailing [email protected] ,

Your request will be processed as quickly as possible, but please note that sometimes products ship quicker than expected. After 24 hours, or after an out of stock item has been confirmed, fees will apply to all cancellations with the exception of Special Order items, made to order items or custom built items; which can not be cancelled after the 24 hour period. Items confirmed on reserve or pre-ordered are subject to a 10% cancellation fee.

Cancellations are subject to a 10% cancellation fee. This fee is not to rip you off in any way. When you place an order, we lose 3% due to credit card processing, and also another 3% to credit your account. The other 4% is much less then what is needed to cover all other costs and expenses lost by cancelling an order, that was already processed. This fee is will only be imposed on orders that have not shipped. If a special order has been placed, such as pistons, turbo's, etc., and the items are built and ready to ship out, and a cancellation is requested, a 25% cancellation fee will be imposed IF possible to be cancelled.

  • To start your cancel please click HERE

What are my shipping fees?
For orders delivered within the continental US where reason for return isn't a result of a JM Auto Racing error, the cost of the initial shipping charge and a return fee will be deducted from your refund. A prepaid shipping label(s) will be provided.
Freight, international & non-continental US returns are accepted, however coordination of return shipping is the responsibility of the client. In the event an error is made by JM Auto Racing, a return shipping label will be provided.

Сore deposits
Some products sold on JM Auto Racing include a core deposit. These parts have a deposit that is charged upon purchase and fully refunded upon the return of the core. Cores must be in rebuildable condition and matching vehicle application to the product sold. Once the product is received and inspected, the deposit will be refunded to your original form of payment. Note: Product cores returned that are not fully assembled or are not the unit that was removed from the vehicle, will not be refunded and the core will be discarded. Detailed instructions on Core Deposit Returns can be found here.

Defective, damaged, or incorrect products
We all know that accidents happen sometimes. If your product(s) arrive defective, damaged, or simply incorrect, please contact our customer service department as soon as possible. Please do not attempt to use, install, modify, or repair the part! We will send you a replacement part and provide you with a prepaid return label to return the defective part. In some instances, return of the product may not be required. Products must be returned to us within 30 days. If the damage was caused by a shipping courier, we will schedule a damage pick up by the courier. Photos of the damage, defect, or fitment issue may be requested in order to correctly process your request. For items mispackaged or missing, returns and replacements will be handeled as warranty requests, subject to manufacturer involvement and normally handled within 24-48 hours. Please note that products must be in the original packaging and there are additional requirements for products that ship freight.

LTL and Freight Shipments will cover the delivery of most oversized items, including but not limited to, body kits, hoods, trunks, spoilers, doors, roll cages. Items should be thoroughly inspected at time of delivery. Any damage NEEDS to be notated on the Bill of Lading prior to the driver leaving for an insurance to be valid. If damage, is not noted, the insurance is voided out and will need to be dealt with between you and the shipping carrier.

Billing, refunds & credits
Payment for orders placed using PayPal of Affirm will be captured as soon as the order has been successfully placed. Payments for orders placed using a debit or credit card will be authorized only and captured upon shipping. What does this mean? If your order is in stock, it will be charged normally. For out-of-stock items arriving within 30 days, you may see the authorization temporarily fall off. The funds will be placed back into your account and you won't see the pending charge from us. Once the item ships, you will see the funds deducted and the charge posted to your account. For out-of-stock items after 30 days, the above will take place, however we will have to recharge your card once the item is ready to ship.

Refunds for returned products are issued with 3-5 business days once they are received by our warehouse and inspected. Refunds will be issued via the same payment method originally used to place the order (Credit Card, PayPal, Google, Affirm, Check). All returns, where JM Auto Racing is not at fault, will have 15% restocking fee less than cost of freight. Free shipping items will have the initial freight fees deducted from the final refund. Shipping is only free if you keep the item you purchased. Some items will have a higher restocking fee. This information will be revealed to you up front upon requesting a return. Once the refund has been issued a confirmation email will be sent. Please allow an additional 5-7 days for the credit to appear on your account.

Shipping & delivery
To ensure a fast and safe delivery we use FedEx, DHL, Ontrac, USPS, & UPS Ground/Air shipping services. Available shipping methods may vary for different type of products and shipping destinations. Most products in stock ship same day, or within 1 business day after which its delivery can be tracked via tracking number sent to your email. For custom or made to order items shipping time varies as they may have to be manufactured, painted, embroidered, or assembled.

Please keep the following in mind:

  • Products that are oversized must ship truck freight / LTL which differs from ground shipments. NOTE: These oversized items require inspection and a signature upon delivery. For more information on freight shipping click here.
  • Shipments to Canada are treated as all other international shipments. It is the recipient's responsibility to pay all applicable duties, taxes, & brokerage fees. Detailed Info can be found here here.
  • Shipments to HI, AK, PR, Guam, Virgin Islands, APOs, & Canada might require extra shipping charges. International shipping quotes will be e-mailed to the customer before the credit card is charged.
  • Oversized items such as hoods, body kits, bumpers, tonneau covers, roofs, trunks and spoilers may require additional postage that is not displayed on the website. You will be contacted prior to the item shipping to confirm.

To request an international shipping quote before placing an orderIf you would like special shipping arrangements, please contact us via live chat, email or call us at 1.855.998.8726

Disclaimer
In effort to provide our valued clients with the most up to date and accurate information, JM Auto Racing is continuously implementing real-time updates to our online superstore. Due to the immediate nature of these updates the correction of any errors and/or omissions can happen at any time without prior notice. This information may include but is not limited to pricing, availability, suggested use, fitment, compatibility, and warranties.

JM Auto Racing is not responsible for any additional charges, labor, loss, or damage incurred as a result of information, correct or incorrect, referenced or products purchased from JM Auto Racing. While we work to avoid any errors or omissions that may appear on the JM Auto Racing website, we do reserve the right to cancel any undelivered orders based on inaccurate information. more details

Additional Info

The goal of AMS is to provide the highest quality, best performing products available. By utilizing research and development and rigorous testing programs, AMS will never compromise the quality or performance of our products. In addition, AMS will only provide the finest customer service offering only advice and parts that are in the best interest of the customer.

At AMS Performance, we specialize in automotive performance for turbocharged vehicles. In addition to being a leader in the automotive performance parts manufacturing industry, we offer in-house engine computer calibration, parts and package installations, as well as engine and transmission building services.

First and foremost, AMS is an engineering company. Unlike other shops, our parts are engineered to be the best performing components you can buy. Most manufacturers in the industry have a basic understanding of engine performance but at AMS we take it far past that using computer-aided designs and mechanical engineers with years of motorsports experience.

AMS Performance has been at the top of the game since opening our doors 20 years ago. From turn-key packages to individual components, we can meet and exceed all kinds of performance goals. From drag racing to road racing, and everything in between, let AMS enhance your driving experience!

Warranty

AMS PRODUCT AND INSTALLATION LABOR

AMS Performance offers a limited warranty against defects in workmanship for all AMS Performance manufactured components as well as technician labor for installation or repair conducted at the AMS Performance facility in West Chicago, IL. AMS’s obligation under this warranty extends solely to the craftsmanship of labor or components manufactured by AMS for a period of twelve months or 12,000 miles for the original purchaser.

Due to the variety of modifications and changes made to cars and/or engines that may affect the performance or durability of related components, AMS’s obligation under this warranty extends solely to the repair or replacement of parts manufactured by AMS.

AMS’s obligation under this limited labor warranty extends solely to the labor required for the repair of components or systems deemed by AMS Performance to have been damaged as a result of an AMS employee’s negligence during installation of those components, systems, or existing components and systems.

AMS COMPLETE VEHICLE PACKAGES

AMS Performance offers a limited warranty against defects in workmanship for all AMS manufactured components within AMS Performance Packages, for the original purchaser. This warranty applies to AMS Performance Packages such as “Alpha”, “Ronin”, and “Omega” branded complete vehicle packages, and begins on the invoice date of part purchase and ends twelve months or 12,000 miles from that date, whichever occurs first. Due to the variety of modifications and changes made to cars and/or engines that may affect the performance or durability of related components, AMS’s obligation under this warranty extends solely to the repair or replacement of a package or packages manufactured, installed and/or sold by AMS.

OEM or other aftermarket parts utilized within the AMS package may or may not be covered by the original manufacturer’s individual component warranty. AMS Performance offers no warranty expressed or implied for other manufacturer’s components within the AMS package.

AMS GEARWORKS® TRANSMISSION ASSEMBLIES

AMS Performance offers a limited warranty against defects in workmanship and craftsmanship for all AMS Gearworks® transmission assemblies. AMS’s obligation under this warranty extends solely to the craftsmanship of assembly labor and workmanship of components manufactured by AMS for a period of twelve months or 12,000 miles for the original purchaser.

OEM or other aftermarket parts utilized within the AMS Gearworks® Transmission may or may not be covered by the original manufacturer’s individual component warranty. AMS Performance offers no warranty expressed or implied for other manufacturer’s components within the AMS Gearworks® Transmission.

YOUR EXISTING OEM VEHICLE WARRANTY, INSURANCE, AND EMISSIONS OBLIGATIONS

A vehicle modified by the use of performance parts and tuning may not meet the legal requirements for use on public roads. AMS Performance makes no claims of compliance unless otherwise stated on a per-product basis. Use or installation of performance parts and tuning may adversely affect the drivability and reliability of your vehicle, and may also affect or eliminate your insurance coverage, factory warranty and new OEM part warranty. There is no stated or implied guarantee from AMS of continued OEM vehicle warranty, insurance coverage, or emissions compliance, due to the stress placed on your vehicle by performance parts and our inability to monitor its use, tuning or modification.

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