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- APR ECU Upgrade - 2.5T EA855 EVO
APR
APR ECU Upgrade - 2.5T EA855 EVO
2.5T I5 Engine Tune for the Audi RS3 17-20, TT RS Quattro 18-22
Part # ECU-25T-EA855-EVO
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APR ECU Upgrade - 2.5T EA855 EVO
2.5T I5 Engine Tune for the Audi RS3 17-20, TT RS Quattro 18-22
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Emissions
This part is legal under the provisions of EPA’s Tampering Policy dated November 23rd, 2020.
See Emissions DetailsAPR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. The upgrades dramatically increase horsepower and torque, making for an exceptionally quicker and more exciting vehicle. This is made possible through APR's optimization of the factory engine management system to take full advantage of the engine's capabilities, without needing any end user adjustment. The ECU Upgrades are available with various features and supported octane levels and each stage is compatible with most typical bolt-on modifications. The software is installed to the vehicle's factory ECU through the OBD-II port, resulting in a clean and headache-free install. Furthermore, for those looking for tuning with a limited powertrain warranty, APR Plus has you covered!
Features:
- Horsepower - More horsepower throughout the whole rpm band
- Torque - More torque throughout the whole rpm band
- Warranty - APR Plus is available, providing a factory term limit matching limited powertrain warranty
- Program Switching - Change programs and access features with your cruise control stalk
- APR Mobile - Change programs and access features with your smart device
- Anti-Theft - Password protects driving the vehicle
- Security Lockout - Password protects program switching
- Fault Code Erase - Resets ECU fault codes and adaption on the fly
- Stages - Multiple performance levels depending on installed hardware
- Low Grip - Multiple profiles designed to enhance launching in low and high grip situations
- Fuel Grades - Multiple octanes from which to choose
- Ethanol - Ethanol support from E60-E85 for maximum performance
- Acceleration - Accelerate faster with more power and reduced throttle lag
- Linear Throttle - Pedal maps adjusted for a more linear feel
- Brake Boosting - Left foot braking or brake boosting added
- Rev Limiter - Increased redline for higher revving
- Standing Limiter - Increased standing limiter for higher revving at idle
- Speed Limiter - Go as fast as you want with the speed limiter out of the way
- Motorsport Limiter - With the soft limiter removed, you’ll get full power right up to the hard, “bap bap bap” redline fuel cut
- Auto Start/Stop Inversion - Auto Start/Stop defaults to the off position
- Exhaust Crackle - Multiple exhaust crackle profiles including factory, mild, and aggressive all with mode switching and component protection
- Exhaust Flaps - Enhanced power delivery and drivability through recalibrated exhaust flap actuation
- Added Safety - Additional safety features and protection modes added
- Boost Gauge - The factory boost gauge displays accurate boost and reacts more quickly
- Power and Torque Gauges - The factory power and torque gauges are accurately rescaled
- Optimized Cold Start - Stage 2 features an optimized cold start that will surely please your neighbors
- Economy - While cruising, or driving normally, your fuel economy may benefit from our optimized calibration
- Flash Counter - Flash counter does not increase with each flash
- Direct Port Programming - Clean and easy install through the OBD II port without removing the ECU
- Free Updates - Get free updates for life
- Guarantee - 30 day money back guarantee
| Brand | APR |
|---|---|
| Emission Code | 7 |
| Engine Aspiration | Turbocharged |
| Engine Configuration | I5 |
| Engine Displacement | 2.5L |
| Engine Family | EA855 EVO |
| Engine Orientation | Transverse |
| Fuel Type | Gasoline |
| Market | NAR |
| ROW | |
| Product Type | ECU Upgrade |
| Part Number | ECU-25T-EA855-EVO |
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This part is legal under the provisions of EPA’s Tampering Policy dated November 23rd, 2020. The company has reasonable basis (test results) to verify that this product allows the vehicle to operate within legal emissions standards and is therefore legal to be sold for on-street use in all states that accept the legal provisions of the Clean Air Act and the EPA Tampering Policy. This product is NOT LEGAL FOR SALE OR USE IN THE STATE OF CALIFORNIA. Testing with the California Air Resources Board, in order to achieve 50-state compliance, is pending with CARB. Once testing is complete with California, and an E.O. number is issued, this product will be updated to 50-state legal status.
Important fuel quality information
Important fuel quality information
Important fuel quality information
Find your boxcode and revision
Find your boxcode and revision
Find your boxcode and revision
Program switching guide
Program switching guide
Program switching guide
APR Plus Warranty Booklet
APR Plus Warranty Booklet
APR Plus Warranty Booklet
Only use fuel equal to or higher than specified. Never use a lower octane fuel. Always follow our fuel guide, especially with race fuel and Ethanol, where available. Dynos are for reference only. Results will vary. Contributing factors include the vehicle condition, vehicle setup, dyno type, dyno setup, environmental factors, fuel quality, and more. When describing fuels, the North American Region (NAR) uses the Anti-Knock Index (AKI), (RON+MON)/2, or (R+M)/2. The Rest of the World (ROW) uses RON. RON is Research Octane Number and MON is Motor Octane Number.
Have a question about this product?
- Question
Does the stage 3 tte700 e85 require a lpfp upgrade?
By mike mounlio on February 26, 2023
AnswerYesHelpful? - Question
Hi, can this ECU be installed on a 2021 RSQ3?
By Emanuele Guerra on February 22, 2023
AnswerYesHelpful?
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APR ECU Upgrade Stages
Our ECU Upgrades are available in multiple configurations. Installation of additional performance hardware, such as an intercooler or intake systems, may provide further performance improvements. Each stage includes optimizations to the factory boost gauge making it react more quickly and corrections to the power and torque gauges to match the increased output. Furthermore, we’ve added left foot braking, removed the speed limiter, raised the rev-limiter and added a motorsport limiter, reenabled the crackle on models where it was removed (2019+), adjusted the factory crackle to protect the components on Stage 1 and 1+ and enabled in more scenarios on Stage 2, retuned the exhaust flap actuation for the best performance and sound in multiple modes, optimized high altitude mappings, retuned the throttle for better response, and completely optimized the driving experience for street and track use making for a much more enjoyable driving experience!
APR Stage 1
The APR Stage 1 ECU Upgrade is the first step towards tuning your engine. It produces up to 459-542 HP and 451-500 FT-LBS of torque. This stage has optional high and low grip modes designed to reduce wheel spin and aid in 60 FT and 0-60 times depending on surface prep. APR Spark Plugs are recommended.
APR Stage 1 is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E60-E85 Ethanol in North America, and 95 RON, 98 RON, 102 AKI, 104 AKI, 108 AKI and E60-E85 Ethanol in the Rest of the World.
APR Plus
APR Plus is our APR Stage 1 ECU Upgrade with our limited powertrain warranty and it’s the first step towards tuning your engine. It produces up to 459 HP and 451 FT-LBS of torque. Please check our warranty manual to understand modifications supported by APR Plus.
APR Stage 1 Plus
The APR Stage 1+ ECU Upgrade is the next step towards tuning your engine. It produces up to 493-569 HP and 454-520 FT-LBS of torque, depending on octane. Use this tune with the APR Turbo Inlet. This stage has optional high and low grip modes designed to reduce wheel spin and aid in 60 FT and 0-60 times depending on surface prep. APR Spark Plugs are recommended.
APR Stage 1+ is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E60-E85 Ethanol in North America, and 95 RON, 98 RON, 102 AKI, 104 AKI, 108 AKI and E60-E85 Ethanol in the Rest of the World.
APR Stage 2
The APR Stage 2 ECU Upgrade is the next step towards tuning your engine. It produces up to 493-569 HP and 454-520 FT-LBS of torque. This stage has optional high and low grip modes designed to reduce wheel spin and aid in 60 FT and 0-60 times depending on surface prep. Additionally this stage is available with optional crackle modes. The more aggressive modes increase the length, duration, intensity, and operating modes of the crackle. APR Spark Plugs are recommended.
APR Stage 2 is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E60-E85 Ethanol in North America, and 95 RON, 98 RON, 102 AKI, 104 AKI, 108 AKI and E60-E85 Ethanol in the Rest of the World.
APR Stage 3
The APR Stage 3 ECU Upgrade is the next step towards tuning your engine. It produces up to
- 576-713 HP with 523-536 FT-LBS of torque (TTE700)
- 581-740 HP with 511-555 FT-LBS of torque (GTX3582)
Use this tune with the TTE700 turbocharger w/ included WG actuator or GTX3582 turbocharger with turbosmart WG actuator and MAC 3-port solenoid. Use 980cc port injectors. Use a proper 500 LPH+ @ 6 bar LPFP with E85 (SRM Brushless). This stage has optional high and low grip modes designed to reduce wheel spin and aid in 60 FT and 0-60 times depending on surface prep. Additionally this stage is available with optional crackle modes. APR Spark Plugs are recommended.
APR Stage 3 is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E60-E85 Ethanol in North America, and 95 RON, 98 RON, 102 AKI, 104 AKI, 108 AKI and E60-E85 Ethanol in the Rest of the World.
Horsepower and Torque Dyno Charts
| Select a Dyno | Select a Dyno Type |
|---|---|
APR Calibration Report
| Stage | HP | TQ | Max Gain | Max Gain |
|---|---|---|---|---|
| Stock As Reported by VAG | 394 HP | 354 FT-LBS | ||
| Stock As Measured by APR | 420 HP | 372 FT-LBS | ||
| APR Plus | ||||
| 91 AKI | 459 HP | 451 FT-LBS | +66 HP | +88 FT-LBS |
| APR Stage 1 | ||||
| 91 AKI / 95 RON | 459 HP | 451 FT-LBS | +66 HP | +88 FT-LBS |
| 93 AKI / 98 RON | 476 HP | 470 FT-LBS | +86 HP | +108 FT-LBS |
| 102 RON | 491 HP | 475 FT-LBS | +98 HP | +112 FT-LBS |
| 100 AKI / 104 RON | 516 HP | 498 FT-LBS | +106 HP | +137 FT-LBS |
| 104 AKI / 108 RON | 524 HP | 506 FT-LBS | +113 HP | +146 FT-LBS |
| E85 | 542 HP | 500 FT-LBS | +132 HP | +134 FT-LBS |
| APR Stage 1+ | ||||
| 91 AKI / 95 RON | 493 HP | 454 FT-LBS | +86 HP | +96 FT-LBS |
| 93 AKI / 98 RON | 513 HP | 480 FT-LBS | +104 HP | +116 FT-LBS |
| 102 RON | 528 HP | 485 FT-LBS | +116 HP | +121 FT-LBS |
| 100 AKI / 104 RON | 533 HP | 510 FT-LBS | +125 HP | +144 FT-LBS |
| 104 AKI / 108 RON | 541 HP | 518 FT-LBS | +132 HP | +152 FT-LBS |
| E85 | 569 HP | 520 FT-LBS | +162 HP | +152 FT-LBS |
| APR Stage 2 | ||||
| 91 AKI / 95 RON | 499 HP | 468 FT-LBS | +92 HP | +113 FT-LBS |
| 93 AKI / 98 RON | 519 HP | 496 FT-LBS | +110 HP | +134 FT-LBS |
| 102 RON | 529 HP | 490 FT-LBS | +120 HP | +125 FT-LBS |
| 100 AKI / 104 RON | 540 HP | 512 FT-LBS | +131 HP | +147 FT-LBS |
| 104 AKI / 108 RON | 548 HP | 520 FT-LBS | +140 HP | +156 FT-LBS |
| E85 | 574 HP | 530 FT-LBS | +165 HP | +165 FT-LBS |
| APR Stage 3 TTE700 | ||||
| 91 AKI / 95 RON | 576 HP | 512 FT-LBS | +162 HP | +145 FT-LBS |
| 93 AKI / 98 RON | 596 HP | 523 FT-LBS | +182 HP | +158 FT-LBS |
| 100 AKI / 104 RON | 682 HP | 526 FT-LBS | +269 HP | +202 FT-LBS |
| 104 AKI / 108 RON | 694 HP | 531 FT-LBS | +280 HP | +210 FT-LBS |
| E85 | 713 HP | 536 FT-LBS | +294 HP | +221 FT-LBS |
| APR Stage 3 GTX3582R | ||||
| 91 AKI / 95 RON | 581 HP | 511 FT-LBS | +164 HP | +145 FT-LBS |
| 93 AKI / 98 RON | 601 HP | 523 FT-LBS | +187 HP | +158 FT-LBS |
| 100 AKI / 104 RON | 707 HP | 544 FT-LBS | +295 HP | +221 FT-LBS |
| 104 AKI / 108 RON | 720 HP | 549 FT-LBS | +306 HP | +230 FT-LBS |
| E85 | 740 HP | 555 FT-LBS | +321 HP | +241 FT-LBS |
Only use fuel equal to or higher than specified. Never use a lower octane fuel. Always follow our fuel guide, especially with race fuel and Ethanol, where available. Dynos are for reference only. Results will vary. Contributing factors include the vehicle condition, vehicle setup, dyno type, dyno setup, environmental factors, fuel quality, and more. When describing fuels, the North American Region (NAR) uses the Anti-Knock Index (AKI), (RON+MON)/2, or (R+M)/2. The Rest of the World (ROW) uses RON. RON is Research Octane Number and MON is Motor Octane Number.
APR EMCS Program Switching
Program switching allows you to access additional program modes and features from your cruise control stalk or your smart device with APR Mobile. Depending on the ECU, available memory, and selected options, up to four program modes and all features, can be installed.
- Stock Mode - Go back to the stock power levels.
- Performance Modes - Switch between octanes and program modes.
- Security Lockout - Password protects program switching.
- Anti-Theft - Password protects driving the vehicle.
- Fault Code Erase - Resets ECU fault codes and adaptation.
APR Mobile
APR Mobile installs on smartphones, tables and other devices, and connects wirelessly to your ECU. The app can then be used to access features such as program switching, fault code reading and resetting, and high speed data logging.
Extreme Testing
APR’s ECU Upgrade has been full tested for the better part of a year prior to a public release. This includes summer and winter weather testing on multiple continents, high and low altitude testing, extensive track testing at multiple road courses, extensive drag strip testing and extensive road and daily driving testing. APR’s test vehicles are full instrumented with multiple sensors, including pre and post intercooler temperature and pressure sensors, pre and post turbine temperature and backpressure sensors, pre and post catalyst temperature and pressure sensors, and multiple pressure sensors throughout the intake system. APR test vehicles have seen over 700 HP in various configurations, on the stock engine internals, and have set multiple world records, including 10.5 second stage 1 quarter mile passes, and 9 second stage 3 passes.
The APR Difference
Who we are - We’re a global automotive engineering firm nestled in Opelika, Alabama. Our 80,000ft² state-of-the-art facility is home to some of the best engineers in the industry, who have mastered hundreds of engine management systems. We have multiple engine and chassis dynos, and the resources necessary to create our ECU Upgrades in-house, from the ground up! We're not a new company either. We've been around since the 90's and we have a strong financial backing to ensure we'll be here to support you for decades to come!
What we do - We optimize everything to make your engine more powerful. We adjust air-fuel ratios, advance ignition, increase boost pressure, alter cam positions and lift profiles, and more, all depending on the type of engine and management system, of course! We don’t take shortcuts, and we don’t take risks. We do it the right way.
How we differ - With our proprietary calibration and direct ram access data logging tools and operating system code changes, we’re able to make some of the strongest and fastest ECU upgrades, without needing costly end user adjustments. We work with the ECUs intelligent modeling and closed-loop systems, and beta test in multiple environments to create upgrades that work no matter where you drive!
APR Software Pricing Guide
Our performance software upgrade is available in multiple stages with optional features.
| APR Plus (USA/Canada) | |
|---|---|
| APR Plus ECU Upgrade | $1,399.95 |
| APR Stage 1 | |
| APR Stage 1 ECU Upgrade | $699.95 |
| APR Stage 1 ECU Upgrade from APR Plus | FREE |
| APR Stage 1+ | |
| APR Stage 1+ ECU Upgrade | $699.95 |
| APR Stage 1+ ECU Upgrade from APR Plus or Stage 1 | FREE |
| APR Stage 2 (Excludes USA) | |
| APR Stage 2 ECU Upgrade | $874.95 |
| APR Stage 2 ECU Upgrade from APR Plus, Stage 1, or Stage 1+ | $175.95 |
| APR Stage 3 | |
| APR Stage 3 ECU Upgrade | $1,049.95 |
| APR Stage 3 ECU Upgrade from APR Plus, Stage 1, or Stage 1+ | $349.95 |
| APR Stage 3 ECU Upgrade from APR Stage 2 | $179.95 |
| Optional Features | |
| Program Switching | $99.95 |
Purchasing, Guarantee, and Updates
Purchasing Options¹: Locate an APR Dealer. They will physically install software on your vehicle at their location. Alternatively with the APR Remote Tuning Service (RTS) you'll purchase an APR Tuning Cable and we, or a participating dealer, will remotely install software on your vehicle†.
Money-Back Guarantee: Try our Software Upgrades for up to 30 days, risk free! If you are not satisfied, have it removed and refunded.²
Free Updates: If we make an update, add a standard feature, or if the manufacturer issues an update, you are entitled to a free update.³
1. Availability: APR Software may not be available for all vehicles. Stages, programs, and features may not be available for all ECUs.
2. Money Back Guarantee: Excludes some Software Upgrades, such as those included with a hardware purchase. Labor charges are at the discretion of the installer.
3. Free updates: Subject to availability. Labor charges are at the discretion of the installer. Applicable to the original purchaser. Second hand owners may inquire with an APR Dealer about a software license transfer fee.
†. Remote flashing: Excludes APR Plus. Excludes some platforms. Dealer participation will vary. Visit our product page for details.
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Some parts are not legal for use in California or other states with similar regulations.