Process West Black Top Mount Intercooler w/ Shroud Subaru WRX 2002-2003 | PWTMIC03B-KIT

Product Fitment: 

2002-2003 Subaru WRX

The Process West Top Mount Intercooler Kit is engineered to be the ultimate no-compromise cooling upgrade for Subaru WRX. Instead of simply increasing core size, this system is designed as a complete, integrated solution—eliminating the common flaws found in typical aftermarket intercoolers and delivering consistent power, lower intake temperatures, and real-world performance gains.

Complete System Design – Not Just a Bigger Core

One of the biggest issues with aftermarket intercoolers is improper ducting. Many upgrades reuse the factory splitter, leaving up to 50% of the intercooler core without airflow—severely limiting performance.

Process West solves this with a purpose-built splitter, precisely matched to the upgraded core. This ensures 100% airflow coverage across the entire intercooler, maximizing cooling efficiency and eliminating wasted surface area.

Optimized Core Thickness (90mm)

While some intercoolers rely on oversized cores for marketing appeal, excessive thickness can actually restrict airflow—especially in top mount configurations where air must already change direction through the hood scoop.

Process West engineers identified 90mm as the optimal core thickness, delivering:

• Maximum cooling efficiency

• Reduced airflow restriction

• Lower intake air temperatures

• Improved overall performance consistency

Balanced Y-Pipe Air Distribution

The included high-performance Y-pipe is engineered to distribute charge air evenly across the full width of the intercooler core. Unlike conventional designs that favor one side, this ensures consistent cooling and airflow efficiency throughout the system.

Proven Performance Gains (Dyno Tested)

Under identical conditions, the Process West system delivers measurable improvements:

• Power Output:

  • Process West: 115.5 kW

  • Factory: 107.5 kW

• Intercooler Outlet Temps (Single Run):

  • Process West: 51°C

  • Factory: 66°C

• Heat Soak (Multiple Runs):

  • Factory Intercooler: Up to 84°C and rising

Real-World Street Performance

On-road testing highlights the true advantage:

• Process West System: ~43°C max under aggressive driving

• Factory Intercooler: ~72°C and continuing to rise

This results in:

• More consistent horsepower

• Improved throttle response

• Reduced ECU timing pull

• Greater reliability under sustained load

Key Features:

• Complete system: intercooler core, splitter, and Y-pipe
  

• Optimized 90mm core thickness

• Purpose-built splitter for full airflow coverage

• Even airflow distribution with engineered Y-pipe

• Significantly reduces heat soak

• Proven gains in power and cooling performance

Performance Benefits:

• Lower intake air temperatures

• Increased and more consistent power output

• Improved throttle response

• Enhanced engine reliability under load

• Ideal for street, track, and tuned builds