High-Performance Intake for GR Yaris (Turbo)

Performance Increase : 15hp, 24Nm

This intake system has been designed from the ground up specifically for the turbocharged GR Yaris engine, taking into account airflow aerodynamics, MAF sensor requirements, and the real constraints of the engine bay layout.

High-Performance Air Filter

The intake features a high-performance air filter with an increased effective filtration area.
The filter is positioned inside an expanded chamber (plenum), which allows:

• reduced air velocity across the filter surface;
• lower pressure loss during filtration;
• even airflow distribution across the entire filter area.

This results in higher flow capacity without compromising filtration efficiency.

Smooth Transitions and Optimized Geometry

The entire internal geometry of the intake is designed with smooth radii and continuous curvature:

• no abrupt restrictions or steps;
• elimination of local turbulence and flow separation zones;
• transitions follow a curvature-continuous design philosophy.

This geometry minimizes aerodynamic losses and provides a stable, uniform airflow.

Venturi / Pressure Recovery Approach

The design is not based on “acceleration for the sake of acceleration,” but on a correct and effective airflow sequence:

1. Air enters through the factory air duct
2. Expansion inside the plenum (pressure recovery) — reduced velocity and restored pressure
3. Filtration in a low-velocity zone
4. Smooth contraction (Venturi-like duct) after the filter
5. Stable, uniform airflow delivery to the turbocharger

This allows the turbocharger to receive air with minimal pressure loss and without parasitic turbulence.

Turbocharger Interaction

For turbocharged engines, inlet restriction before the compressor is critical.
This intake:

• reduces vacuum before the turbocharger;
• improves airflow uniformity at the compressor inlet;
• eases turbo operation at high airflow demand.

The result is more consistent throttle response, reduced parasitic losses, and potentially more efficient turbocharger operation at higher load.

Intake Air Temperature

The system is designed to:

• draw air from the factory cold air duct;
• minimize exposure to hot under-hood air;
• avoid unnecessary heating caused by turbulence and pre-filter compression.

More stable intake air temperatures lead to more predictable engine and ECU behavior.

MAF Compatibility

The intake is engineered with full consideration for the mass air flow sensor:

• a straight section with constant diameter is provided before the MAF;
• no active contractions or bends are present in the sensor zone;
• a uniform velocity profile is maintained.

This ensures accurate MAF readings without the need for additional calibration or correction.

Summary

This intake is not simply an “open filter,” but a fully engineered airflow system:

• optimized airflow path;
• reduced aerodynamic losses;
• correct turbocharger and sensor operation;
• focus on real performance efficiency, not just sound or appearance.

Suitable both for stock vehicles and for setups with increased intake demand.