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See more parts for Subaru STI
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Introducing the AMS Performance Subaru EJ Intake Manifold ? a no-compromise solution for serious power and the highest horsepower-producing manifold in its class. Designed and tested in-house using SolidWorks? and CFD analysis software, this cast manifold features a massive 4.5-liter plenum, 13? equal-length runners, and 2.5? tapered ports for maximum airflow and efficiency. CNC-machined billet bellhorns act as internal velocity stacks, delivering a broad powerband and impressive top-end performance. In dyno testing, we saw gains of up to 51 WHP over the OEM manifold. Available in standard or reversed configurations, it supports throttle bodies up to 70mm (with mild porting) and is compatible with top-feed injectors and aftermarket rails. As the most cost-effective intake manifold solution at this power level, it?s the perfect choice for racers and enthusiasts looking to get the most out of their EJ engine.
The AMS Performance Subaru EJ Intake Manifold was engineered from the ground up to be the highest performing solution on the market, leveraging our decades of experience and in-house development capabilities. By casting the manifold, we achieved greater strength and the freedom to sculpt optimized internal geometry for maximum efficiency and airflow. Designed using SolidWorks? and Computational Fluid Dynamics software, it features a massive 4.5-liter plenum for extreme top-end power, 2.5? (63.5mm) intake runner ID, and 3.8? (96.7mm) OD CNC-machined billet aluminum bellhorns that act as internal velocity stacks, and 13? equal-length, tapered runners precisely angled to match cylinder head ports. This combination minimizes turbulence into the combustion chamber, enhances throttle response, and delivers exceptional airflow and horsepower throughout the RPM range ? making it the ultimate intake manifold upgrade for Subaru EJ engines.
Features:
Fitment:
The AMS Performance Subaru EJ Intake Manifold was engineered from the ground up to be the highest performing solution on the market, leveraging our decades of experience and in-house development capabilities. By casting the manifold, we achieved greater strength and the freedom to sculpt optimized internal geometry for maximum efficiency and airflow. Designed using SolidWorks? and Computational Fluid Dynamics software, it features a massive 4.5-liter plenum for extreme top-end power, 2.5? (63.5mm) intake runner ID, and 3.8? (96.7mm) OD CNC-machined billet aluminum bellhorns that act as internal velocity stacks, and 13? equal-length, tapered runners precisely angled to match cylinder head ports. This combination minimizes turbulence into the combustion chamber, enhances throttle response, and delivers exceptional airflow and horsepower throughout the RPM range ? making it the ultimate intake manifold upgrade for Subaru EJ engines.
Features:
- Gains as high as 51 WHP seen in back to back dyno testing compared to OEM
- 4.5 Liter Plenum Volume for Massive Top End Power
- 13? Equal Length Intake Runners for a Perfectly Optimized Powerband
- Massive Airflow Supplied to the Engine via 2.5? (63.5mm) ID Intake Runners
- CNC Machined Billet Aluminum Bellhorns to act as Internal Velocity Stacks
- Increased Port Size at Cylinder Heads Allow Matching to Larger Hand Ported or CNC Ported Cylinder Heads
- Throttle Body Opening Accepts Larger Throttle Bodies up to 2.625? (66.675mm) or 70mm with mild porting
- Available with STI Red Powder Coating or Uncoated Configuration in either Standard or Reverse Throttle Body Orientation
Fitment:
- Subaru WRX w/ EJ20 (Requires adapter to use WRX style drive by cable throttle body) 2002-2005
- Subaru WRX w/ EJ25 2006-2007
- Subaru WRX w/ EJ25 (Requires using STI style drive by wire throttle body) 2008-2014
- Subaru STI w/ EJ25 2004-2007
- Subaru STI w/ EJ25 (May require mild clearancing of A/C compressor line) 2008-2021
- Will fit various Legacy and Forester EJ25 applications with proper throttle body usage and custom fitting
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| Make Vehicle | Model | Year |
|---|---|---|
|
2004-2021 Subaru STI |
STI | 2004-2021 |
|
2002-2016 Subaru WRX |
WRX | 2002-2016 |
Welcome to Vivid Racing, your premier destination for top-tier automotive upgrades, featuring the renowned AMS Performance. With a commitment to excellence and innovation, AMS Performance is synonymous with high-performance parts that elevate your vehicle's capabilities. Whether you drive a turbocharged beast or a supercar, AMS Performance has the perfect solution to enhance your ride.
Why Choose AMS Performance?AMS Performance is a trusted name in the automotive industry, known for its cutting-edge technology and rigorous testing. Their products are designed to maximize performance while ensuring reliability and durability. At Vivid Racing, we proudly offer a comprehensive range of AMS Performance products that cater to enthusiasts and professionals alike.
Explore Our Extensive Product CategoriesVivid Racing stocks an impressive selection of AMS Performance products, including:
- Turbo Kits: Boost your horsepower with AMS's advanced turbocharger systems designed for optimal performance.
- Intercoolers: Keep your engine cool and efficient with high-performance intercoolers that reduce intake temperatures.
- Exhaust Systems: Experience a throaty growl and improved exhaust flow with AMS's precision-engineered exhaust solutions.
- Intake Systems: Enhance airflow and engine response with AMS's high-flow intake systems, perfect for any performance build.
- Tuning Solutions: Optimize your vehicle's performance with AMS's tuning solutions that unlock your engine's full potential.
At Vivid Racing, we make it easy to find the right AMS Performance products for your vehicle. Our user-friendly website allows you to browse by category, making your shopping experience seamless. With our competitive pricing and expert customer support, you can trust that you're getting the best value for your performance upgrades.
Join the AMS Performance CommunityWhen you choose AMS Performance products from Vivid Racing, you're not just upgrading your vehicle; you're joining a community of passionate automotive enthusiasts. Share your build, connect with other performance seekers, and stay updated on the latest innovations from AMS Performance.
Ready to take your ride to the next level? Shop AMS Performance at Vivid Racing today!
LIMITED PRODUCT AND LABOR WARRANTY
This warranty applies to AMS parts and begins on the invoice date of part purchase and ends twelve (12) 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 parts manufactured by AMS.
This warranty applies to AMS’ labor and begins on the invoice date and ends twelve (12) months from that date. 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.
All warranty returns must be pre-authorized by contacting AMS at (847) 709-0530. Parts deemed under warranty will be repaired or replaced by AMS at no cost to the customer. Payment of the cost of labor related to said repair/replacement is at the sole discretion of AMS and will only be covered by AMS where the AMS part or parts were originally installed or service was performed at the AMS facility located at 1760 Metoyer Court, West Chicago, Illinois, 60185. Labor/service performed at any other facility is at the sole discretion of that facility and is excluded from this warranty.
To file a warranty claim, AMS or the authorized dealer must be notified and the vehicle and/or part must be brought to AMS or the authorized dealer within seventy-two (72) hours of discovery of the defect, where feasible. Any returned merchandise shipped to AMS must be shipped with the AMS issued Return Authorization (RA) number clearly marked on the exterior of the shipping carton or package. Shipping charges to and from AMS are the responsibility of the customer.
To file a warranty claim, the part must be returned with proof of purchase, the customer name and address, type of car, year, odometer reading, and VIN number, the installation and removal date of the part, and the date the part was delivered. No claims will be considered without the aforementioned information and the original AMS part. Return freight charges must be prepaid. Collect charged returns will not be accepted. All parts replaced under warranty will become the sole property of AMS Performance.
EXCLUSIONS
Parts showing evidence of misapplication, abuse, misuse, improper maintenance, neglect, alterations from their original configuration, or failure to follow installation instructions are expressly not covered by this warranty. AMS reserves the right to make changes to products, or specifications at any time without obligation to modify earlier parts. No person, company, or other organization is authorized to assume for AMS any warranty responsibility or make binding judgments regarding warranties of any parts, which from time to time may become subject of a warranty claim.
The AMS Limited Product Warranty further excludes the following: Transportation and shipping charges, towing and rental car charges, damage to a component or assembly due to installation of replacement parts with specification(s) that differ in any material respect from the original vehicle manufacturer’s or AMS parts, damage resulting from the modification of an AMS part, damage resulting from the use of other manufacturer’s products in conjunction with AMS’ products or systems, damage to clutch or transmission components, maintenance services and parts when replaced during maintenance such as spark plugs, lubricants, fluids, engine tune-up parts, replacement filters, coolant and refrigerant, mechanical adjustments or repairs which result from normal wear and tear, drive belts, light bulbs, damage due to the failure to perform maintenance services at the specified intervals or in accordance with the instructions in the owner’s manual from the original vehicle manufacturer or AMS product instructions, damage attributed to negligence, improper installation, improper treatment contrary to the instructions in the owner’s manual from the original vehicle manufacturer or AMS product instructions, damage resulting from improper or contaminated fuel, damage to a AMS component as a result of a collision or repair, any vehicle/products operated and used in a competitive event, custom designed competition parts, incidental and /or consequential damages, including loss of time, inconvenience or loss of the use of the vehicle.
AMS’ Limited Product Warranty applies only to AMS vehicles and AMS products sold and installed through AMS Preferred Dealers and Installers.
LIMITED PACKAGE WARRANTY
This warranty applies to AMS packages and begins on the invoice date of part purchase and ends twelve (12) 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.
All warranty returns must be pre-authorized by contacting AMS at (847) 709-0530. Parts/packages deemed under warranty will be repaired or replaced by AMS at no cost to the customer Payment of the cost of labor related to said repair/replacement is at the sole direction of AMS and will only be covered by AMS in the event the AMS part or parts were originally installed or service was performed at the AMS facility located at 1760 Metoyer Court, West Chicago, Illinois, 60185. Labor/service performed at any other facility is at the sole discretion of that facility and is excluded from this warranty.
To file a warranty claim, AMS or the authorized dealer must be notified and the vehicle and/or part must be brought to AMS or the authorized dealer within seventy-two (72) hours of discovery of the defect, where feasible. Any returned merchandise shipped to AMS must be shipped with the AMS issued Return Authorization (RA) number clearly marked on the exterior of the shipping carton or package. Shipping charges to and from AMS are the responsibility of the customer.
To file a warranty claim, the part must be returned with proof of purchase, the customer name and address, type of car, year, odometer reading, and VIN number, the installation and removal date of the part, and the date the part was delivered. No claims will be considered without the aforementioned information and the original AMS part. Return freight charges must be prepaid. Collect charged returns will not be accepted. All parts replaced under warranty will become the sole property of AMS Performance.
EXCLUSIONS
Parts showing evidence of misapplication, abuse, misuse, improper maintenance, neglect, alterations from their original configuration, or failure to follow installation instructions are expressly not covered by this warranty.
AMS reserves the right to make changes to products, packages or specifications at any time without obligation to modify earlier installed products, packages or specifications. No person, company, or other organization is authorized to assume for AMS any warranty responsibility or make binding judgments regarding warranties of any parts, which from time to time may become subject of a warranty claim.
This AMS Limited Package Warranty further excludes the following: Transportation and shipping charges, towing and rental car charges, damage to a component or assembly due to installation of replacement parts with specification(s) that differ in any material respect from the original vehicle manufacturer’s or AMS parts, damage resulting from the modification of an AMS part, damage resulting from the use of other manufacturer’s products in conjunction with AMS’s products or systems, damage to clutch or transmission components, maintenance services and parts when replaced during maintenance such as spark plugs, lubricants, fluids, engine tune-up parts, replacement filters, coolant and refrigerant, mechanical adjustments or repairs which result from normal wear and tear, drive belts, light bulbs, damage due to the failure to perform maintenance services at the specified intervals or in accordance with the instructions in the owner’s manual from the original vehicle manufacturer or AMS product instructions, damage attributed to negligence, improper installation, improper treatment contrary to the instructions in the owner’s manual from the original vehicle manufacturer or AMS product instructions, damage resulting from improper or contaminated fuel, damage to a AMS component as a result of a collision or repair, any vehicle/products operated and used in a competitive event, custom designed competition parts, incidental and /or consequential damages, including loss of time, inconvenience or loss of the use of the vehicle.
AMS’ Limited Package Warranty applies only to AMS vehicles and AMS products and packages sold and installed through AMS Preferred Dealers and Installers.
This warranty applies to AMS parts and begins on the invoice date of part purchase and ends twelve (12) 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 parts manufactured by AMS.
This warranty applies to AMS’ labor and begins on the invoice date and ends twelve (12) months from that date. 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.
All warranty returns must be pre-authorized by contacting AMS at (847) 709-0530. Parts deemed under warranty will be repaired or replaced by AMS at no cost to the customer. Payment of the cost of labor related to said repair/replacement is at the sole discretion of AMS and will only be covered by AMS where the AMS part or parts were originally installed or service was performed at the AMS facility located at 1760 Metoyer Court, West Chicago, Illinois, 60185. Labor/service performed at any other facility is at the sole discretion of that facility and is excluded from this warranty.
To file a warranty claim, AMS or the authorized dealer must be notified and the vehicle and/or part must be brought to AMS or the authorized dealer within seventy-two (72) hours of discovery of the defect, where feasible. Any returned merchandise shipped to AMS must be shipped with the AMS issued Return Authorization (RA) number clearly marked on the exterior of the shipping carton or package. Shipping charges to and from AMS are the responsibility of the customer.
To file a warranty claim, the part must be returned with proof of purchase, the customer name and address, type of car, year, odometer reading, and VIN number, the installation and removal date of the part, and the date the part was delivered. No claims will be considered without the aforementioned information and the original AMS part. Return freight charges must be prepaid. Collect charged returns will not be accepted. All parts replaced under warranty will become the sole property of AMS Performance.
EXCLUSIONS
Parts showing evidence of misapplication, abuse, misuse, improper maintenance, neglect, alterations from their original configuration, or failure to follow installation instructions are expressly not covered by this warranty. AMS reserves the right to make changes to products, or specifications at any time without obligation to modify earlier parts. No person, company, or other organization is authorized to assume for AMS any warranty responsibility or make binding judgments regarding warranties of any parts, which from time to time may become subject of a warranty claim.
The AMS Limited Product Warranty further excludes the following: Transportation and shipping charges, towing and rental car charges, damage to a component or assembly due to installation of replacement parts with specification(s) that differ in any material respect from the original vehicle manufacturer’s or AMS parts, damage resulting from the modification of an AMS part, damage resulting from the use of other manufacturer’s products in conjunction with AMS’ products or systems, damage to clutch or transmission components, maintenance services and parts when replaced during maintenance such as spark plugs, lubricants, fluids, engine tune-up parts, replacement filters, coolant and refrigerant, mechanical adjustments or repairs which result from normal wear and tear, drive belts, light bulbs, damage due to the failure to perform maintenance services at the specified intervals or in accordance with the instructions in the owner’s manual from the original vehicle manufacturer or AMS product instructions, damage attributed to negligence, improper installation, improper treatment contrary to the instructions in the owner’s manual from the original vehicle manufacturer or AMS product instructions, damage resulting from improper or contaminated fuel, damage to a AMS component as a result of a collision or repair, any vehicle/products operated and used in a competitive event, custom designed competition parts, incidental and /or consequential damages, including loss of time, inconvenience or loss of the use of the vehicle.
AMS’ Limited Product Warranty applies only to AMS vehicles and AMS products sold and installed through AMS Preferred Dealers and Installers.
LIMITED PACKAGE WARRANTY
This warranty applies to AMS packages and begins on the invoice date of part purchase and ends twelve (12) 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.
All warranty returns must be pre-authorized by contacting AMS at (847) 709-0530. Parts/packages deemed under warranty will be repaired or replaced by AMS at no cost to the customer Payment of the cost of labor related to said repair/replacement is at the sole direction of AMS and will only be covered by AMS in the event the AMS part or parts were originally installed or service was performed at the AMS facility located at 1760 Metoyer Court, West Chicago, Illinois, 60185. Labor/service performed at any other facility is at the sole discretion of that facility and is excluded from this warranty.
To file a warranty claim, AMS or the authorized dealer must be notified and the vehicle and/or part must be brought to AMS or the authorized dealer within seventy-two (72) hours of discovery of the defect, where feasible. Any returned merchandise shipped to AMS must be shipped with the AMS issued Return Authorization (RA) number clearly marked on the exterior of the shipping carton or package. Shipping charges to and from AMS are the responsibility of the customer.
To file a warranty claim, the part must be returned with proof of purchase, the customer name and address, type of car, year, odometer reading, and VIN number, the installation and removal date of the part, and the date the part was delivered. No claims will be considered without the aforementioned information and the original AMS part. Return freight charges must be prepaid. Collect charged returns will not be accepted. All parts replaced under warranty will become the sole property of AMS Performance.
EXCLUSIONS
Parts showing evidence of misapplication, abuse, misuse, improper maintenance, neglect, alterations from their original configuration, or failure to follow installation instructions are expressly not covered by this warranty.
AMS reserves the right to make changes to products, packages or specifications at any time without obligation to modify earlier installed products, packages or specifications. No person, company, or other organization is authorized to assume for AMS any warranty responsibility or make binding judgments regarding warranties of any parts, which from time to time may become subject of a warranty claim.
This AMS Limited Package Warranty further excludes the following: Transportation and shipping charges, towing and rental car charges, damage to a component or assembly due to installation of replacement parts with specification(s) that differ in any material respect from the original vehicle manufacturer’s or AMS parts, damage resulting from the modification of an AMS part, damage resulting from the use of other manufacturer’s products in conjunction with AMS’s products or systems, damage to clutch or transmission components, maintenance services and parts when replaced during maintenance such as spark plugs, lubricants, fluids, engine tune-up parts, replacement filters, coolant and refrigerant, mechanical adjustments or repairs which result from normal wear and tear, drive belts, light bulbs, damage due to the failure to perform maintenance services at the specified intervals or in accordance with the instructions in the owner’s manual from the original vehicle manufacturer or AMS product instructions, damage attributed to negligence, improper installation, improper treatment contrary to the instructions in the owner’s manual from the original vehicle manufacturer or AMS product instructions, damage resulting from improper or contaminated fuel, damage to a AMS component as a result of a collision or repair, any vehicle/products operated and used in a competitive event, custom designed competition parts, incidental and /or consequential damages, including loss of time, inconvenience or loss of the use of the vehicle.
AMS’ Limited Package Warranty applies only to AMS vehicles and AMS products and packages sold and installed through AMS Preferred Dealers and Installers.
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