AEM Induction Cold Air Intake System

Fits 2008–2014 Subaru WRX and STI

Part #: 21-478C

Overview

The AEM 08-14 WRX/STi Cold Air Intake System is engineered to enhance your vehicle’s airflow, supporting improved horsepower and torque. Designed specifically for Subaru WRX and STI models from 2008 to 2014, this intake system combines performance-driven features with durable construction to optimize engine response and efficiency. Whether you're a performance enthusiast or seeking a reliable upgrade, this intake system offers a significant step forward in your vehicle’s intake performance, all while maintaining excellent filtration and airflow characteristics. This system is ideal for drivers looking to maximize their turbocharged engine’s potential while ensuring long-lasting filter performance and ease of maintenance. The included components are designed to fit seamlessly into your vehicle, providing a straightforward upgrade that enhances both the sound and response of your turbocharged Subaru.

Key Features

Designed with performance and durability in mind, the AEM Cold Air Intake System features a high-quality, oversized synthetic washable filter that provides outstanding airflow and filtration. The mandrel-bent aluminum intake tube ensures smooth airflow paths, reducing turbulence and enhancing throttle response. The system includes a custom heat shield that helps protect intake air from engine bay heat, maintaining cooler air temperatures for optimal combustion. Hardware and fittings are of high quality, ensuring a secure and long-lasting installation. This intake system is built to withstand the rigors of daily driving and spirited performance.

Construction & Design

The intake system features a mandrel-bent aluminum tube designed for optimal airflow and durability. The oversized synthetic filter is engineered for high filtration efficiency and long service intervals, capable of supporting up to 100,000 miles between filter cleanings under normal highway conditions. The custom heat shield is crafted to minimize intake air temperature, helping to maintain consistent performance and engine efficiency. All hardware is precision-machined for a secure fit and ease of installation.

Driving Feel & Feedback

Installing this cold air intake can improve throttle response and engine sound, providing a more engaging driving experience. The system helps your turbocharged engine breathe more freely, supporting smoother acceleration and a more aggressive intake tone without compromising reliability.

Installation & Fitment

The system is designed for straightforward installation with minimal modifications required. It fits directly into your Subaru WRX or STI from 2008 to 2014, with all necessary hardware included for a secure and reliable upgrade.

What’s Included

The package includes the oversized synthetic washable air filter, mandrel-bent aluminum intake tube, custom heat shield, and all necessary hardware for installation.

Ideal For

Performance enthusiasts seeking to maximize airflow and engine response in their Subaru WRX or STI. Perfect for those looking for a durable, long-lasting upgrade that enhances both sound and performance.