Process West Cold Air Intake Subaru Impreza JDM 1999-2000 | PWCAI02

The Process West Cold Air Intake is a direct-fit replacement intake system designed for the 1999–2000 Subaru WRX and STI. Engineered to reduce intake restriction and improve airflow into the EJ engine, this upgrade delivers better breathing, improved response, and a more engaging driving experience.

Improved Intake Sound & Performance Feel

Replacing the factory airbox allows the engine to breathe more freely, producing a noticeably deeper and more aggressive induction sound under acceleration. The improved airflow path enhances the driving experience without requiring any additional modifications.

Precision Engineered Construction

Designed with performance and reliability in mind, this intake features:

• Lightweight CNC mandrel bent aluminum tubing
• Smooth, unrestricted airflow design
• Integrated machined airflow meter mount
• Retains factory airflow meter without modification
• Durable black coating for a clean OEM-style finish

This combination ensures both performance gains and long-term durability.

High-Flow Filtration Included

Each kit includes a K&N high-flow air filter, offering:

• Improved airflow over the factory filter
• Excellent filtration efficiency
• Long service life with a reusable design

Straightforward Installation

Built as a true bolt-on upgrade, this intake system provides:

• Direct replacement for factory airbox
• No cutting or permanent modifications required
• Simple and clean installation process

Key Features:

• Fits 1999–2000 Subaru WRX & STI
• CNC mandrel bent aluminum intake tubing
• Includes K&N high-flow air filter
• Retains factory airflow meter
• Improves airflow and reduces restriction
• Enhances intake sound
• Durable black OEM-style finish
• Bolt-on installation

Performance Benefits:

• Increased airflow efficiency
• Improved throttle response
• Enhanced induction sound
• Reliable filtration and long-term performance