See more parts for Subaru STI
Select the year of your Subaru STI:
Product thumb
AEM Cold Air Intake System 21-735WR for Subaru WRX STI 2015-2017, 2.5L 4-Cyl, Red Finish
$299.99
Free Shipping

If you're looking to give your Subaru WRX STI a bit more oomph, the AEM 21-735WR Performance Cold Air Intake System might just be what you need. This isn't just another air intake; it's a well-thought-out upgrade that replaces your factory setup with something that actually lets your engine breathe. Designed specifically for the 2015-2017 WRX STI, this system is all about enhancing airflow and boosting horsepower and torque.

What sets this intake apart is the oversized AEM Dryflow synthetic washable air filter. It's engineered for high airflow and exceptional filtration, which means your engine gets cleaner air. Plus, it’s easy to clean and can go up to 100,000 miles before needing a scrub—depending on how you drive, of course. The filter sits snugly in the original airbox space, shielded from heat to keep intake temperatures down and performance up.

The intake tubing is made from durable mandrel-bent aluminum, finished in a slick textured red powder coat. It’s not just for looks; this setup is designed to work with your factory emissions controls, including the mass air flow sensor, so you won't run into any issues there. Installation? A breeze with basic tools. And just so you know, AEM backs this product with a lifetime limited warranty, which is always a nice touch.

Now, if you’re in California or a state that follows CA emissions standards, make sure to check the legal status for your vehicle. This intake is CARB exempt with EO number D-670-24, but it’s always good to double-check. So, if you're ready to enhance your WRX STI's performance without sacrificing legality, this might be the right fit for you.

Features

  • Air Box Included: No
  • Air Filter Color: Red
  • Air Filter Height: 9 in (229 mm)
  • Air Filter Material: Non-woven Synthetic
  • Air Filter Outlet Shape: Round
  • Air Filter Outlet Width: 2.75 in (70 mm)
  • Air Filter Washable: Yes
  • CARB EO Number: D-670-24
  • Clamp Color/Finish: Natural
  • Clamp Material: Stainless Steel
  • Clamp Style: Regular
  • Clamps Included: 3
  • Coupler Color/Finish: Not Applicable
  • Couplers Included: None
  • Intake Pipe Color / Finish: Wrinkle Red
  • Intake Pipe Inlet Length: 19 in (483 mm)
  • Intake Pipe Inlet Shape: Round
  • Intake Pipe Inlet Width: 2.75 in (70 mm)
  • Intake Pipe Material: Aluminum
  • Intake Pipe Outlet Length: 19 in (483 mm)
  • Intake Pipe Outlet Shape: Round
  • Intake Pipe Outlet Width: 2.75 in (70 mm)
  • Mass Air Flow Sensor Adapter Included: Mass Air Flow Sensor Adapter Included When Required
  • Mounting Hardware Included: Yes
  • Oil Included: No Filter Oil Required
  • Package Material: Paperboard
  • Package Type: Box
  • Product Style: AEM Cold Air Intake System
  • Prop 65 (C, R or CR): CR
  • Prop 65 - Short Label: WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
  • Prop 65 Warning Label: Link
  • Prop 65 Yes/No: Yes
  • Replacement Filter: 21-2029DK
  • Street Legal In All US States: See Vehicle Applications
  • Title: AEM AEM-21-735WR AEM Cold Air Intake System
  • TUV Approved (Europe): No
  • Warranty: Limited Lifetime
  • Weight: 8.9 lb (4 kg)

Notes:

California Air Resources Board Exempt: Yes; CARB EO: D-670-24; AEM - Metal Intake System; Wrinkle Red (CAS)

Products Fitment:

  • Subaru STI 2015-2017
  • Subaru WRX 2015-2016
Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2015-2017
Subaru STI
2015-2016
Subaru WRX
AEM Intake

AEM intake offers the very best cold air intake systems on the market, providing drivers with everything they need to get the most out of their vehicle. At Vivid Racing, we are proud to offer our customers AEM cold air intake systems, providing this trusted and reliable brand to all types of drivers.

Whether you are part of a professional race team or just like to push your car to the limit, an AEM intake system is a welcome addition to your vehicle.

What Is an AEM Cold Air Intake System?

An AEM cold air intake system is specifically designed to increase the volume of cold air flowing into your engine as you drive. The thinking behind this is that cold air is much denser than warm air. Therefore, if there is more cold air in your engine, there is more air in general, which also means that there is more oxygen. A higher amount of oxygen present in a car engine increases the potency of combustion, which can increase the power and efficiency of your engine.

What Are the Benefits of an AEM Intake System?

An AEM intake kit maximizes the amount of power you can get from your engine. This increase in power will also help you conserve fuel and increase your fuel efficiency, saving you money at the gas station. In a sense, an AEM intake system helps your car and engine “breathe” more efficiently, allowing it to reach its full potential.

Why Should I Choose an AEM Intake Kit?

AEM is regarded as one of the best aftermarket intake systems on the market, combining quality materials, cutting-edge technology and reliable design to help drivers around the globe improve the power of their engine. All AEM cold air intake systems are engineered to increase your car’s torque and horsepower, and any AEM intake kit comes with a lifetime limited warranty.

Purchase an AEM Cold Air Intake From Vivid Racing Today

Take your driving experience to the next level by purchasing an AEM cold air intake from Vivid Racing. We’ll help you find an AEM intake and air filter that perfectly fits your specific needs. To learn more or to order an AEM intake kit, contact Vivid Racing by calling (480) 966-3040.

Aem Lifetime Limited Warranty- This Limited Warranty Gives You Specific Legal Rights And You May Also Have Other Rights, Which Vary From State To State. [This Limited Warranty Can Also Be Found Online At Www.Aemintakes.Com/Warranty. 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. What Does This Warranty Cover? This Warranty Covers Defects In Materials And Workmanship Of Your Aem Air Intake System Or Aem Oe Replacement Filter (The "Product"), With The Exceptions Stated Below.

Aem One-Year Limited Warranty - This Limited Warranty Gives You Specific Legal Rights And You May Also Have Other Rights, Which Vary From State To State. This Limited Warranty Can Also Be Found Online At Www.Aemintakes.Com/Warranty . 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. What Does This Warranty Cover? This Warranty Covers Defects In Materials And Workmanship Of Your Aem Universal & Special Air Filter Or Aem Accessory (The "Product"), With The Exceptions Stated Below.

Aem 90-Day Limited Warranty - This Limited Warranty Gives You Specific Legal Rights And You May Also Have Other Rights, Which Vary From State To State. This Limited Warranty Can Also Be Found Online At Www.Aemintakes.Com/Warranty. 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. What Does This Warranty Cover? This Warranty Covers Defects In Materials And Workmanship Of Your Aem Accessory, Clothing, Promotional Material Or Raw Material (The "Product"), With The Exceptions Stated Below.

What Do These Warranties Not Cover:This Warranty Does Not Cover Damage Due To (A) Transportation, (B) Storage, (C) Improper Use, (D) Failure To Follow The Product Instructions Or To Perform Any Preventive Maintenance, (E) Modifications, (F) Unauthorized Repair, (G) Normal Wear And Tear, (H) Any Type Of Racing Or Competition, (I) Any Off-Road Use Or (J) External Causes Such As Accidents, Abuse, Or Other Actions Or Events Beyond Our Reasonable Control (E.G., Acts Of God And Natural Disasters).

What Will Aem Do? We Will Repair Any Product That Proves To Be Defective In Materials Or Workmanship. If 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.

How Do I Get Service?If You Are Ever Dissatisfied With The Materials, Workmanship Or Performance Of This Product, Just Give Aem A Call At 1-800-992-3000 And We Will Be Happy To Assist You.

Limitation Of Liability The Remedies Described Above 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.

Installation Instructions

Click to view the Installation Instructions here

Dyno Sheet

Click to Download here

Check out these other great products