HKS POWER EDITOR R FOR TOYOTA GR YARIS GXPA16 G16E-GTS 42018-AT024

 

HKS POWER EDITOR R FOR TOYOTA GR YARIS GXPA16 G16E-GTS 42018-AT024

HKS Power Editor R — Toyota GR Yaris GXPA16 G16E-GTS

The HKS Power Editor R 42018-AT024 is HKS’s vehicle-specific boost-control module for the 2024-April-onward Toyota GR Yaris GXPA16 with the G16E-GTS. 

It is specifically different from the earlier 42018-AT020, which is for the pre-April-2024 model. 

The engineering philosophy

Think of the Power Editor R as a smart boost-correction layer between the GR Yaris’s sensors and ECU, rather than a conventional ECU replacement.

It intercepts sensor signals and modifies the control strategy so the engine can operate with higher boost. More importantly, the R version can account for:

• Engine RPM
• Vehicle speed
• Throttle position
• Gear-dependent conditions

That allows HKS to apply different corrections depending on how the car is being driven instead of simply adding the same boost increase everywhere. 

What does 42018-AT024 actually deliver?

HKS’s published Gen 2 test data shows:

Parameter	Stock	Power Editor R
Maximum power	198 kW / 268 PS	208 kW / 283 PS
Maximum torque	414 Nm	433 Nm
Max boost	182 kPa / 1.86 kgf/cm²	191 kPa / 1.95 kgf/cm²
Maximum power gain	—	+20 PS
Maximum torque gain	—	+37 Nm

These figures are HKS’s own dyno results, not a guarantee for every vehicle. The test vehicle also used HKS intake/exhaust components, so the result should not be interpreted as a universally achievable +20 PS on a completely stock car. 

Why the torque gain matters more than the headline horsepower

The interesting part is actually the +37 Nm.

The G16E-GTS is already a very strong 1.6-litre turbo engine. Adding boost in the appropriate operating region can make the car feel substantially stronger during:

corner exit → throttle application → turbo response → acceleration

HKS specifically reports stronger output particularly through the mid-to-high RPM range, with benefits during overtaking, merging and corner exits. 

So the objective isn’t simply:

“Make the dyno number bigger.”

It is closer to:

Use the G16E-GTS turbo system more aggressively while retaining a controllable relationship between throttle, speed, RPM and boost.

Power Editor vs Power Editor R

This distinction is important.

The older Power Editor primarily provides a simpler boost increase. The Power Editor R expands the correction strategy with additional mapping capability.

HKS says the R’s Easy Writer supports correction maps involving:

• voltage correction
• airflow correction
• vehicle-speed correction
• throttle correction
• 3D mapping
• data monitoring/logging

This gives considerably more flexibility for calibration than the earlier Power Editor architecture. 

The R can also store two setting patterns through the included map-changeover wiring, while a return connector allows the system to be returned to the stock configuration. 

The important fitment detail

42018-AT024 = GR Yaris GXPA16, G16E-GTS, April 2024 onward.

Do not confuse it with:

• 42018-AT020 → GXPA16, September 2020–March 2024
• 42018-AT023 → Power Editor rather than Power Editor R, 2024-April-onward

HKS explicitly lists 42018-AT024 for the newer GXPA16 generation. 

The conclusion

The clever part of the Power Editor R isn’t simply the extra boost.

It is the control philosophy:

Sensor information → correction maps → boost response → torque delivery → vehicle behaviour

For a small-displacement turbo engine such as the G16E-GTS, that matters because uncontrolled boost increases can create an unnecessarily aggressive torque spike. 

HKS’s approach attempts to make the additional boost conditional on RPM, speed and throttle demand, producing a more sophisticated power-delivery strategy.

For a GR Yaris build, therefore, the Power Editor R makes the most engineering sense as one component of a matched system—intake, intercooling, exhaust, thermal management and calibration should be considered together rather than treating the boost controller as an isolated horsepower upgrade. 

HKS itself tested the Gen 2 system with supporting intake, exhaust and cooling hardware. 

HKS POWER EDITOR R FOR TOYOTA GR YARIS GXPA16 G16E-GTS 42018-AT024