Process West Intake Manifold Track Version Reverse Throttle Position Black Subaru STI 2004-2021 | PWIM001B

Product Fitment:

2004-2021 Subaru STI

When a standard throttle body location won’t work for your setup, the Process West Track Billet Intake Manifold in DBW reverse orientation provides a high-performance solution without compromise. Designed for demanding engine bay layouts, this configuration delivers the same proven power and airflow benefits in a more adaptable form.

Built for serious performance applications, this manifold is ideal for track, street, and drag builds that require flexibility in throttle body placement.

Built for Extreme Performance

Constructed entirely from CNC-machined billet aluminum, this manifold sets the standard for strength, durability, and precision.

Key construction features include:

• Solid billet aluminum design
• Generous bell-mouth runner entries for improved airflow
• Thick-wall polished mandrel-bent tubing
• High-end TIG welded assembly
• Rated for up to 100 PSI of boost pressure

This level of craftsmanship delivers superior reliability and performance compared to cast or fabricated alternatives.

Track-Tuned Power Delivery

The Track version is engineered with optimized plenum volume and runner length to maximize performance across the entire powerband:

• Aggressive low and mid-range torque
• Strong, sustained top-end power
• Proven 10%+ gains on completely stock setups

This balanced design makes it a powerful upgrade for both mild and heavily modified builds.

Reverse Orientation Design (DBW)

The drive-by-wire (DBW) reverse orientation layout is ideal for custom builds where traditional throttle body placement creates clearance or routing challenges.

This configuration allows for:

• Improved engine bay packaging flexibility
• Custom intercooler and piping solutions
• Cleaner, more efficient routing for high-performance setups

Built for Track & High-Performance Builds

This manifold is best suited for builds that prioritize performance over comfort:

• Recommended for track, circuit, and drag applications
• Ideal for high-horsepower builds
• Not intended for setups requiring factory air conditioning

Key Features:

• DBW reverse orientation intake manifold
• CNC-machined billet aluminum construction
• Rated for 100 PSI boost pressure
• Optimized plenum and runner design
• Bell-mouth runner entries for improved airflow
• High-quality TIG welded assembly
• Designed for custom engine bay layouts
• Proven 10%+ power gains

Performance Benefits:

• Increased horsepower and torque
• Improved airflow efficiency
• Strong low-end response with high-end power
• Enhanced throttle response
• Built for extreme durability under high boost