PIII GR Yaris Airbox Intake Kit
The PIII Toyota GR Yaris Airbox Intake Kit is a complete OEM+ intake solution developed to maximize airflow, improve engine response and support higher engine performance while preserving the functionality, appearance and integration of the original airbox system.
The result of years of continuous development, testing and refinement, it combines multiple motorsport-derived engineering solutions within a fully sealed OEM+ architecture to deliver a level of performance, drivability and engineering sophistication rarely found in aftermarket intake systems.
Unlike many open-cone intake systems, the PIII Airbox Intake Kit retains a sealed cold-air design, enhancing engine performance, transient response and thermal efficiency while preserving factory functionality and appearance.
Today, hundreds of GR Yaris owners around the world rely on this intake for a proven and repeatable performance improvement that typically installs in 15–30 minutes and remains fully reversible.
Main Benefits
- Increased airflow, engine response and torque potential, with gains ranging from approximately 6 bhp to more than 20 bhp depending on the vehicle setup and calibration.
- Increased induction sound under all driving conditions
- Sealed cold-air intake path from the front of the vehicle
- Included air filter
- Compatible with the OEM Lexus/Toyota panel filter
- Compatible with the included PIII High-Flow Panel Filter
- OEM+ engine bay appearance
- No permanent modifications required
- No bumper removal required for installation
- Proven design and real life performance gains on GR Yaris
Testing
After three years of development, we are proud to bring you our GR Yaris Airbox Intake kit: unique in its design and engineered to current top motorsport specifications, this airbox enables you to use the stock panel filter in order to maintain OEM Service of the car. It is possible to install aftermarket panel filters to obtain even more performance. When combined with an aftermarket panel filter, we found over +6bhp over the stock unit on OEM ECU settings, and further improved performance across the power band on Stage 1&2 EcuTek engine software. The power gains increase with the total engine power output, so results will vary depending on your supporting mods and engine tune.
These results were possible thanks to careful flow analysis, that also led us to re-use the OEM Turbo air intake pipe up to the airbox itself, as larger diameter pipes only lead to loss of air density in all applications under 550bhp, hence more turbo lag and less torque.
- On a stock ECU with OEM software: Gen.1 GR Yaris on ACME's hub dyno returned a 5.9hp gain over the stock airbox, before having time for adaptations!
- On a stock ECU with Stage 1 software and OEM AirBox, at ProfiTuning, once we swapped to the PIRAS Motorsport AirBox we had to reduce our Wastegate Duty Cycle by 8% in order to remain at the same power level: demonstrating the increase in airflow.
- On a Syvecs ECU with Stage 1 software, Gen.1 Rally R1T GR Yaris on ACME's hub dyno, working in Speed/Density mode, only by swapping the OEM Airbox to the PIRAS Motorsport unit obtained 7.5hp of power increase, while eliminating the torque dip and showing more power from 5300rpm to 7200rpm. Of course, software adaptation would further increase these numbers.
- On a highly tuned GR Yaris, with Stage 2 or Stage 3 setups, you can easily see gains of over more than 20 bhp over the stock intake.
Test 1: carried out on an OEM Gen.1 GR Yaris and no changes to the electronics. Gains will be larger after the OEM ECU has time to adapt. Testing by ACME Racing on a Hub dyno by Rotronics:
Test 3: carried out on a R1T Rally GR Yaris, with Syvecs ECU and no changes to the electronics. Gains may be larger after software adaptation. Testing by ACME Racing on a Hub dyno by Rotronics:
Laminar Airflow
PIRAS Motorsport Airbox Intake kit allows for faster spool and fresh air collection, with the most laminar flow of any other solution on the market, directly feeding air from the front bumper to the stock format (OEM) panel filter, that is crossed at exactly 90 degrees. This can not be achieved with a “cone filter” design, as air would cross the filter at an angle. Ever asked yourself why the top motorsport cars use panel filter designs, when not constrained by packaging? Now you got it!
MAF Sensor Housing
Unique to PIRAS Motorsport Airbox Intake Kit is also the “HP MJF” 3D Printed MAF Sensor Housing: thanks to its perfect dimensional accuracy, it enables the cleanest sensor readings possible, for consistent tuning and repeatable operation with no issues.
The design allows for seamless bonding with the rear AirBox duct, and a number of features that render it 100% identical to the OEM MAF Sensor Housing, for the most accurate readings possible.
The Picture below illustrates the latest version from March 2026, with added bracket to plug in the OEM MAF Sensor wiring harness. No technical modifications were done.
Made in Italy
The Airbox is Made in Italy, and is industrially thermoformed in plastic. It features a sheet metal lower bracket that mates perfectly with the OEM mounting points.
No modifications are required. Installation can typically be completed in 15–30 minutes using simple hand tools.
No corners are cut when engineering, developing and producing our products.
This airbox is intended for motorsport and off-road use only.
Important Usage Notes
Air Filter & Wet Weather Use
The PIII GR Yaris Airbox Intake Kit is designed around the OEM Toyota panel filter format. However, we do not recommend using the OEM paper air filter in heavy rain or very wet conditions. Please use the included filter in heavy rain!
Paper filters can absorb moisture and restrict airflow when saturated. For customers who regularly drive in wet conditions, we recommend using a high-quality performance panel filter designed to withstand moisture exposure.
Included parts
- 1x Main airbox intake
- 1x Air Filter: PIII High Flow Rally.2 Spec (starting 03/06/2026)
- 1x Laser-cut mounting bracket (connects the airbox to the car)
- Mounting hardware
Technical specification table
| Feature | Specification |
|---|---|
| Product | PIII GR Yaris Airbox Intake Kit |
| Vehicle compatibility | Toyota GR Yaris |
| Filter format | OEM Toyota panel filter |
| Air filter included | YES |
| Main airbox material | Industrially thermoformed plastic |
| MAF housing material | HP MJF 3D printed material |
| Intake design | Sealed cold-air intake |
| Installation | Direct fitment with simple hand tools |
| Permanent modification required | No |
| Estimated installation time | Less than 30 minutes |
| Production | Made in Italy |
| Use | Motorsport / off-road use only |
Frequently asked questions
What power gains can I expect?
Around 6–20 bhp, depending on the level of tune and supporting modifications. ECU calibration and the complete vehicle setup determine the gain.
What does the kit include?
The main airbox, PIII high-flow panel filter, one laser-cut mounting bracket that connects the airbox to the car, and mounting hardware. This GR Yaris kit does not include a radiator cover or radiator cooling plate.
How long does installation take?
Typically 15–30 minutes using simple hand tools and the original mounting points. No bumper removal or permanent modifications are required.
Which filter should I use in heavy rain?
Use the included PIII panel filter. We do not recommend the OEM paper filter in heavy rain or very wet conditions because absorbed moisture can restrict airflow.
PIII GR Yaris Airbox Intake Kit
The PIII Toyota GR Yaris Airbox Intake Kit is a complete OEM+ intake solution developed to maximize airflow, improve engine response and support higher engine performance while preserving the functionality, appearance and integration of the original airbox system.
The result of years of continuous development, testing and refinement, it combines multiple motorsport-derived engineering solutions within a fully sealed OEM+ architecture to deliver a level of performance, drivability and engineering sophistication rarely found in aftermarket intake systems.
Unlike many open-cone intake systems, the PIII Airbox Intake Kit retains a sealed cold-air design, enhancing engine performance, transient response and thermal efficiency while preserving factory functionality and appearance.
Today, hundreds of GR Yaris owners around the world rely on this intake for a proven and repeatable performance improvement that typically installs in 15–30 minutes and remains fully reversible.
Main Benefits
- Increased airflow, engine response and torque potential, with gains ranging from approximately 6 bhp to more than 20 bhp depending on the vehicle setup and calibration.
- Increased induction sound under all driving conditions
- Sealed cold-air intake path from the front of the vehicle
- Included air filter
- Compatible with the OEM Lexus/Toyota panel filter
- Compatible with the included PIII High-Flow Panel Filter
- OEM+ engine bay appearance
- No permanent modifications required
- No bumper removal required for installation
- Proven design and real life performance gains on GR Yaris
Testing
After three years of development, we are proud to bring you our GR Yaris Airbox Intake kit: unique in its design and engineered to current top motorsport specifications, this airbox enables you to use the stock panel filter in order to maintain OEM Service of the car. It is possible to install aftermarket panel filters to obtain even more performance. When combined with an aftermarket panel filter, we found over +6bhp over the stock unit on OEM ECU settings, and further improved performance across the power band on Stage 1&2 EcuTek engine software. The power gains increase with the total engine power output, so results will vary depending on your supporting mods and engine tune.
These results were possible thanks to careful flow analysis, that also led us to re-use the OEM Turbo air intake pipe up to the airbox itself, as larger diameter pipes only lead to loss of air density in all applications under 550bhp, hence more turbo lag and less torque.
- On a stock ECU with OEM software: Gen.1 GR Yaris on ACME's hub dyno returned a 5.9hp gain over the stock airbox, before having time for adaptations!
- On a stock ECU with Stage 1 software and OEM AirBox, at ProfiTuning, once we swapped to the PIRAS Motorsport AirBox we had to reduce our Wastegate Duty Cycle by 8% in order to remain at the same power level: demonstrating the increase in airflow.
- On a Syvecs ECU with Stage 1 software, Gen.1 Rally R1T GR Yaris on ACME's hub dyno, working in Speed/Density mode, only by swapping the OEM Airbox to the PIRAS Motorsport unit obtained 7.5hp of power increase, while eliminating the torque dip and showing more power from 5300rpm to 7200rpm. Of course, software adaptation would further increase these numbers.
- On a highly tuned GR Yaris, with Stage 2 or Stage 3 setups, you can easily see gains of over more than 20 bhp over the stock intake.
Test 1: carried out on an OEM Gen.1 GR Yaris and no changes to the electronics. Gains will be larger after the OEM ECU has time to adapt. Testing by ACME Racing on a Hub dyno by Rotronics:
Test 3: carried out on a R1T Rally GR Yaris, with Syvecs ECU and no changes to the electronics. Gains may be larger after software adaptation. Testing by ACME Racing on a Hub dyno by Rotronics:
Laminar Airflow
PIRAS Motorsport Airbox Intake kit allows for faster spool and fresh air collection, with the most laminar flow of any other solution on the market, directly feeding air from the front bumper to the stock format (OEM) panel filter, that is crossed at exactly 90 degrees. This can not be achieved with a “cone filter” design, as air would cross the filter at an angle. Ever asked yourself why the top motorsport cars use panel filter designs, when not constrained by packaging? Now you got it!
MAF Sensor Housing
Unique to PIRAS Motorsport Airbox Intake Kit is also the “HP MJF” 3D Printed MAF Sensor Housing: thanks to its perfect dimensional accuracy, it enables the cleanest sensor readings possible, for consistent tuning and repeatable operation with no issues.
The design allows for seamless bonding with the rear AirBox duct, and a number of features that render it 100% identical to the OEM MAF Sensor Housing, for the most accurate readings possible.
The Picture below illustrates the latest version from March 2026, with added bracket to plug in the OEM MAF Sensor wiring harness. No technical modifications were done.
Made in Italy
The Airbox is Made in Italy, and is industrially thermoformed in plastic. It features a sheet metal lower bracket that mates perfectly with the OEM mounting points.
No modifications are required. Installation can typically be completed in 15–30 minutes using simple hand tools.
No corners are cut when engineering, developing and producing our products.
This airbox is intended for motorsport and off-road use only.
Important Usage Notes
Air Filter & Wet Weather Use
The PIII GR Yaris Airbox Intake Kit is designed around the OEM Toyota panel filter format. However, we do not recommend using the OEM paper air filter in heavy rain or very wet conditions. Please use the included filter in heavy rain!
Paper filters can absorb moisture and restrict airflow when saturated. For customers who regularly drive in wet conditions, we recommend using a high-quality performance panel filter designed to withstand moisture exposure.
Included parts
- 1x Main airbox intake
- 1x Air Filter: PIII High Flow Rally.2 Spec (starting 03/06/2026)
- 1x Laser-cut mounting bracket (connects the airbox to the car)
- Mounting hardware
Technical specification table
| Feature | Specification |
|---|---|
| Product | PIII GR Yaris Airbox Intake Kit |
| Vehicle compatibility | Toyota GR Yaris |
| Filter format | OEM Toyota panel filter |
| Air filter included | YES |
| Main airbox material | Industrially thermoformed plastic |
| MAF housing material | HP MJF 3D printed material |
| Intake design | Sealed cold-air intake |
| Installation | Direct fitment with simple hand tools |
| Permanent modification required | No |
| Estimated installation time | Less than 30 minutes |
| Production | Made in Italy |
| Use | Motorsport / off-road use only |
Frequently asked questions
What power gains can I expect?
Around 6–20 bhp, depending on the level of tune and supporting modifications. ECU calibration and the complete vehicle setup determine the gain.
What does the kit include?
The main airbox, PIII high-flow panel filter, one laser-cut mounting bracket that connects the airbox to the car, and mounting hardware. This GR Yaris kit does not include a radiator cover or radiator cooling plate.
How long does installation take?
Typically 15–30 minutes using simple hand tools and the original mounting points. No bumper removal or permanent modifications are required.
Which filter should I use in heavy rain?
Use the included PIII panel filter. We do not recommend the OEM paper filter in heavy rain or very wet conditions because absorbed moisture can restrict airflow.
Contact us
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We value each and every Customer that trusts us with her or his orders: this is why we reply to your questions or service requests with lightning-fast speed, and always help you with the best solution possible, including technical advice on products, settings and setups. Just Contact Us and see for Yourself!