Process West Intake Manifold w/ Port Injection Fuel Rails Polished 2015-2021 Subaru WRX

Fitment Information:

2015-2021 Subaru WRX

The Process West DITTO RACE is a high-performance intake manifold engineered for extreme builds on the Subaru WRX platform. Designed for tuners pushing beyond the limits of the factory direct injection system, it adds integrated port injection capability while dramatically improving airflow efficiency.

Built for High-Power Applications

The DITTO RACE combines a precision billet plenum with large-bore cast runners, delivering maximum airflow and cylinder filling for high-boost engines. Internal porting and increased plenum volume are engineered to support consistent power delivery under extreme conditions.

• Hybrid billet plenum and cast runner construction
• High-flow internal design for improved cylinder filling
• Optimized for high-boost and motorsport use
• Developed through 12 months of R&D for measurable performance gains

Integrated Port Injection System

The defining feature of the RACE version is its built-in port injection capability:

• Four additional injector ports (EV14 compatible)
• High-flow fuel rail system included
• Supports 1000+ horsepower builds
• Allows supplemental fueling alongside factory direct injection
• Enables safe AFR control at high boost levels

This setup gives tuners the flexibility to scale fueling capacity without replacing the intake manifold as power increases.

Tuning & Compatibility

• Compatible with aftermarket ECU or injector driver required for port injection control
• Designed to operate without triggering a check engine light in standard configuration
• Supports staged fueling strategies for high-output applications

Fitment Notes

• Direct fit with front mount intercooler systems using stock inlet manifold layout
• Process West Verticooler requires fitting kit (PWIM007VFT)
• Some top mount intercooler setups (e.g., Khanacooler) may require minor bracket or duct adjustments