AIRTEC Motorsport Radiator for Toyota Yaris GR Gen 1 / Gen 2 422679

AIRTEC Motorsport Radiator — Toyota GR Yaris Gen 1 / Gen 2

Product SKU: 422679 · AIRTEC part number: ATRADYGR3

The AIRTEC Motorsport upgraded radiator is a direct-replacement cooling component developed for the Toyota GR Yaris Gen 1 and Gen 2. 

Its engineering objective is straightforward: increase the radiator’s heat-rejection capacity so the engine cooling system can better manage sustained heat during demanding driving.

For a turbocharged GR Yaris, this is particularly relevant when the car regularly experiences high engine loads, repeated acceleration or extended track sessions. It is a cooling-system upgrade, not a horsepower modification by itself.

1. The engineering: OEM vs AIRTEC

Standard Toyota radiator

28 mm core depth 

7.16 L Reported radiator capacity

AIRTEC upgraded radiator

40 mm core depth

10.6 L Reported radiator capacity

+48% Capacity

More coolant capacity AIRTEC increases the stated capacity from 7.16 to 10.6 litres, with a deeper aluminium core and welded end tanks.

Specification	Standard	AIRTEC
Width	624 mm	624 mm
Height	410 mm	426 mm
Core depth	28 mm	40 mm
Capacity	7.16 L	10.6 L
Frontal area	256 cm²	266 cm²
Construction	OEM radiator	Aluminium tube-and-fin

Source: AIRTEC Motorsport’s published product specifications.

2. Why the extra cooling capacity matters

A. Thermal management under boost

A turbocharged engine produces substantial heat under sustained load. The radiator transfers heat from engine coolant into the passing air. A larger core provides more coolant volume and potentially more effective heat exchange, depending on airflow and operating conditions.

B. Repeated hard driving

On a circuit, consecutive high-load laps can increase heat accumulation. Additional radiator capacity can help the cooling system resist temperature rise, although performance depends on ambient temperature, airflow, thermostat operation and the rest of the cooling system.

C. Hot-climate operation

In Malaysia’s warm, humid conditions, the temperature difference between the coolant and incoming air may be smaller than in a cool climate. Additional cooling capacity can be useful under demanding conditions, but it cannot compensate for restricted airflow, a faulty cooling fan or an existing cooling-system problem.

3. Does it increase horsepower?

Not directly.

The radiator does not inherently increase boost pressure, engine displacement or combustion efficiency. Its primary function is thermal control.

The benefit is that a better-managed cooling system can help the engine maintain more consistent operating conditions under sustained load. If the original system is already keeping temperatures within its intended range, an upgraded radiator may deliver little measurable power gain.

4. Is installation complicated?

AIRTEC describes this as a direct replacement using the original mounting points and connections, with no cutting or trimming required. Fitting instructions are supplied.

For a reliable installation, the cooling system should be filled and bled correctly, leaks checked, and coolant temperatures verified after installation.

One important distinction: the main radiator is only one part of the GR Yaris thermal-management system. The engine coolant, engine oil, turbocharger cooling circuit and, where applicable, transmission cooling have different thermal demands. The main radiator does not replace dedicated oil or auxiliary cooling upgrades.

5. Who should consider this upgrade?

Driving or modification profile	Assessment
Standard road car, normal commuting	Lower priority if the existing system works correctly
Fast road driving in hot weather	Potentially worthwhile if cooling capacity is a concern
Modified engine with sustained high load	More relevant; assess actual coolant temperatures
Frequent circuit sessions	Worth considering alongside oil-temperature management
Existing overheating problem	Diagnose the root cause before upgrading

6. Final technical verdict

The AIRTEC Motorsport 422679 is best understood as a thermal-management upgrade rather than a power upgrade. 

Its 48% increase in stated radiator capacity and deeper 40 mm core are the main engineering selling points.

AIRTEC Motorsport Radiator for Toyota Yaris GR Gen 1 / Gen 2 422679