Process West Cold Air Intake Subaru Impreza JDM 1997-1998 | PWCAI01

The Process West Cold Air Intake is a direct replacement intake system designed specifically for the 1997–1998 Subaru WRX and STI. Engineered to reduce intake restriction and improve airflow into the EJ engine, this system enhances both performance and driving experience without requiring complex modifications.

Improved Intake Sound & Driving Experience

Replacing the restrictive factory airbox allows your engine to breathe more freely, resulting in a noticeable increase in induction sound under acceleration. The deeper, more pronounced intake tone adds to the overall driving feel without being excessive.

Precision Engineered Construction

Built with performance and durability in mind, this intake system features:

• Lightweight CNC mandrel bent aluminum tubing
• Smooth, unrestricted airflow path
• Integrated machined airflow meter mount
• Retains factory airflow meter without modification
• Durable black finish for a clean OEM+ look

This ensures both performance gains and a factory-quality fit and finish.

High-Flow Filtration Included

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

• Increased airflow compared to stock filters
• Excellent filtration efficiency
• Long service life with reusable design

Straightforward Installation

Designed as a true bolt-on upgrade, this intake system offers:

• Direct replacement for factory intake
• No cutting or permanent modifications required
• Simple installation process

Key Features:

• Direct fit for 1997–1998 Subaru WRX & STI
• CNC mandrel bent aluminum intake piping
• Includes K&N high-flow air filter
• Retains factory airflow meter
• Improves airflow and reduces restriction
• Enhances intake sound
• Durable black powder-coated finish
• Bolt-on installation

Performance Benefits:

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