AEM Cold Air Intake System

2016–2017+ Scion iA / Toyota Yaris iA

21-804C

Overview:

The AEM Cold Air Intake System 21-804C is a precision-engineered upgrade designed specifically for the 2016 Scion iA and 2017+ Toyota Yaris iA models. This intake system replaces the factory air filter and intake housing with a high-flow, low-restriction setup that enhances engine breathing, resulting in improved horsepower and throttle response. Ideal for enthusiasts seeking a reliable and efficient performance boost, the AEM intake delivers measurable gains without compromising daily drivability or factory emissions controls.

With a focus on quality and durability, this intake system is tuned and dyno-tested to ensure optimal performance and fitment. It is an excellent choice for drivers who want to enhance acceleration and engine sound while maintaining ease of installation and long-term maintenance convenience.

Key Features:

The AEM Cold Air Intake System offers a range of features engineered to maximize performance and reliability:

• Increases horsepower by approximately 7 HP at 4400 RPM
• Tuned and dyno-tested for improved acceleration and enhanced engine sound
• Low restriction mandrel-bent aluminum intake tubing for smooth airflow
• Durable gunmetal gray powder-coated finish resists corrosion and wear
• Oversized AEM Dryflow synthetic air filter with washable, oil-free media
• Air filter lifespan up to 100,000 miles before cleaning, depending on driving conditions
• Heat shield design reduces intake air temperature for increased power
• Maintains compatibility with factory emissions control devices including mass airflow sensor and PCV line
• Includes stainless steel worm gear clamps and couplers for secure installation
• Backed by AEM’s Limited Lifetime Warranty for peace of mind

Construction & Design:

The intake tube is crafted from mandrel-bent aluminum, ensuring smooth airflow with minimal turbulence. Its gunmetal gray powder-coated finish not only provides a sleek appearance but also protects against corrosion and environmental damage. The system features an AEM Dryflow air filter made from a non-woven synthetic, oil-free media that is washable and reusable, eliminating the need for oiling and reducing maintenance time.

The air filter is strategically positioned within the original air box space and shielded by a heat shield to minimize heat soak from the engine bay. This design helps maintain cooler intake air temperatures, which contributes to improved combustion efficiency and power output.

Performance & Sound

By replacing the restrictive factory intake components, the AEM Cold Air Intake System enhances airflow to the engine, resulting in an estimated 7 horsepower gain at 4400 RPM. This increase translates to quicker throttle response and improved acceleration. Additionally, the intake produces a more aggressive engine sound that adds to the driving experience without being overly loud or intrusive.

Installation & Fitment:

The AEM 21-804C intake system is designed for a straightforward installation using commonly available hand tools. It fits directly into the factory air box location and accommodates all factory emissions components, including the mass airflow sensor and PCV line, ensuring no modifications are necessary. Installation can typically be completed in under an hour by a skilled enthusiast or professional mechanic.

This intake system is compatible with select 2016 Scion iA and 2017+ Toyota Yaris iA models. Please verify fitment before purchase to ensure compatibility with your vehicle.

What's Included:

• Mandrel-bent aluminum intake tube with gunmetal gray powder coat finish
• AEM Dryflow synthetic washable air filter (red color)
• Heat shield for air filter protection
• Stainless steel worm gear clamps (2)
• Couplers and mounting hardware
• Installation instructions

Ideal For:

This cold air intake system is ideal for Scion iA and Toyota Yaris iA owners looking to enhance their vehicle’s performance with a reliable, easy-to-install upgrade. It suits daily drivers seeking improved horsepower and throttle response, as well as enthusiasts who appreciate a more engaging engine sound and long-lasting filter media with minimal maintenance.

Emissions Note

This AEM Cold Air Intake System is not legal for sale or use in California or other states that have adopted California emission standards. It is intended for off-road or racing use only in those regions.