Process West FA Intake Manifold Polished Subaru WRX 2015-2021

Product Fitment:

2015-2021 Subaru WRX

The Process West DITTO (Direct Injection Tubular Original) is a high-performance intake manifold engineered for the Subaru WRX FA20DIT platform. Designed to maximise airflow efficiency and cylinder filling, it combines billet and cast construction to deliver class-leading intake flow for both stock and heavily modified setups.

Engineering & Performance

Developed over extensive in-house R&D, the DITTO manifold improves intake efficiency through increased plenum volume and optimized internal port design. The result is improved airflow distribution and stronger performance across the rev range.

• Hybrid billet + cast aluminum construction for strength and flow
• Increased plenum volume for improved cylinder filling
• High-flow runner design for improved engine breathing
• Supports higher boost applications with improved efficiency

No Tune Required (NO CEL Design)

Part of Process West’s “NO CEL” range, the DITTO manifold can be installed on a stock vehicle without triggering a check engine light or requiring an immediate ECU tune, while still delivering noticeable performance improvements.

Performance Gains

• Immediate throttle and response improvement on stock setups
• Scales significantly with tuned and high-boost applications
• Improved airflow efficiency supports higher horsepower potential

Fitment & Compatibility

• Direct fit for FA20DIT WRX platforms
• Compatible with Process West intercooler systems and most aftermarket cooling setups
• Verticooler applications require fitting kit (PWIM007VFT)
• Some top-mount and custom setups may require minor bracket adjustments

DITTO RACE (High Power Version)

For extreme builds, the DITTO RACE variant supports:

• Additional injector ports (EV14 compatible)
• Port injection capability for 1000+ hp builds
• Ideal for high-boost, ethanol, or motorsport applications