Process West Cold Air Intake Black Subaru STI 2015-2021 | PWCAI07

Product Fitment:

2015-2021 Subaru STI

The Process West 72mm Cold Air Intake is a direct replacement intake system designed for the 2015–2021 Subaru WRX STI (VA chassis). Engineered to reduce intake restriction and improve airflow into the EJ engine, this upgrade delivers improved response, enhanced sound, and more efficient engine breathing without requiring additional modifications.

Improved Intake Sound & Driving Feel

Replacing the factory airbox allows the engine to breathe more freely, resulting in a noticeably deeper and more aggressive induction sound under acceleration. The less restrictive airflow path enhances the driving experience while maintaining everyday usability.

Precision Engineered Construction

Built with performance and OEM-level fitment in mind, this intake features:

• Lightweight CNC mandrel bent aluminum tubing
• Optimized 72mm intake design for improved airflow
• Integrated machined airflow meter mount
• Retains factory airflow meter without modification
• Durable black coating for a clean OEM+ appearance

This ensures a balance of performance gains, durability, and factory-style integration.

High-Flow Filtration Included

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

• Improved airflow compared to stock filter
• Excellent filtration efficiency
• Long-term reusable performance

Straightforward Installation

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

• Direct replacement for factory intake system
• No cutting or permanent modifications required
• Clean and simple installation process

Key Features:

• Fits 2015–2021 Subaru WRX STI (VA chassis)
• 72mm optimized cold air intake design
• CNC mandrel bent aluminum tubing
• Includes K&N high-flow air filter
• Retains factory airflow meter
• Improves airflow and reduces restriction
• Enhances induction sound
• Durable black OEM-style finish
• Bolt-on installation

Performance Benefits:

• Increased airflow efficiency
• Improved throttle response
• Enhanced intake sound
• Reliable filtration and long-term usability