Unitronic Stage 2 Performance Software is precisely calibrated for use with 91 or 93 octane fuel, engineered for a 2017-2021 A4, A4 Quattro or A4 allroad Quattro that has upgraded hardware bolt-ons.* Performance Software for your ECU Box Code is subject to availability.

Unitronic Stage 2 TCU Performance Software is required to run Stage 2 ECU tune.

Gas type

Access to both 91 Octane & 93 Octane files   

Installation
Flashed directly through the (OBDII) Diagnostic port of your vehicle (15-20 minutes).

Uniconnect+
This vehicle has added support through UniCONNECT+ which allows you to program your own vehicle right in your own garage. Learn More

Performance Gains: 

• 91 Octane: +85HP / +84 LB-FT TQ
• 93 Octane: +93HP / +101 LB-FT TQ 

Required Hardware *to meet advertised power*

• Intercooler Upgrade Kit For 2.0TSI MLB B9 A4/A5/Allroad
• Intake System for B9 2.0 TSI MLB EA888
• Upgraded Downpipe
• *Unitronic Stage 2 TCU Software is required along with the Unitronic Intake, Intercooler and Downpipe to achieve published power figures.

Features

• Optimized Responsiveness, Smoothness, Drivability, and Comfort

  Unitronic’s ECU calibrations are engineered to improve engine response and reduce low-end lag. Unitronic’s Performance Software has gained worldwide recognition and is well known for its broad powerband, with smooth power delivery, maximizing responsiveness and “area under the curve”, under normal and hard acceleration.

• Ignition Timing Precisely Calibrated for Higher Octane Fuel

  Engine calibration optimized to take advantage of higher fuel quality to extract maximum energy from the combustion. Therefore, when using a higher octane fuel, more power and better fuel efficiency will be achieved.

• Left Foot Braking (LFB) Enabled (Stage 2 Only)

  LFB allows users to apply load on the engine using their left foot on the brake, to build boost when the edge is needed at the race track.

• Exhaust Crackle/Overrun Enabled (Stage 2 Only)

  For North American vehicles. Requires UniConnect+ cable. Subject to availability.

• Optimized Maximum Output

  Unitronic’s ECU Calibrators deliver the maximum power output while staying within the operational limits of the factory engine and drivetrain components. Specifically, this results in the highest engine performance without sacrificing the reliability of the engine, turbocharger, or other engine and drivetrain components.

• Factory Safety Limiters Retained

  OEM “fail safes” are retained within the ECU calibration. Close monitoring of all operation parameters ensures that engine operation stays within factory components limits, resulting in reliability.

• Power Delivery Perfectly Optimized Throughout the Power Band

  Aligned with the OEM strategy, the calibration is designed to offer a large flat torque plateau to provide a smooth and linear power band. Maximum torque output is achieved sooner and maintained longer which creates a broader torque plateau and greater area under the curve. This results in an improved acceleration and optimal engine operation.

• Speed Governor Removed

  Vehicle speed limiter within ECU is removed. (Subject to transmission rotational speed limit.)

• Improved Fuel Efficiency

  Optimized timing and injection in cruising condition allows for an improved fuel efficiency, under normalized driving conditions.

• Engineered with Strict Industry Standards

  With over 10 years of experience with Bosch and Siemens engine management systems and calibrations, Unitronic is able to utilize its expertise, industry leading tools and equipment to ensure an optimal calibration; delivering maximum performance, while maintaining complete OEM-like reliability and drivability.

• Extensively Tested Under Various Driving Conditions

  Development begins using Unitronic’s in-house Maha Chassis dyno housed in an environmentally controlled cell; closely monitoring a plethora of operational data, utilizing industry leading calibration tools and resources. Beta calibrations are then tested in street and track scenarios, using multiple cars under various driving conditions. This engine calibration strategy ensures Unitronic Performance Software delivers maximum performance, OEM-like drivability and reliability anywhere in the world. Unitronic Performance Software is only released to its Clients once development is thoroughly completed in accordance to Unitronic’s strict standards.

• Full Staged Software Suite

  Includes all Stage 2 Tune variants and all lower Software Stages as well.

Dyno Results

UNITRONIC STAGE 2 On 91 Octane : 337HP / 357LB-FT

STOCK POWER: 252HP / 273LB-FT

UNITRONIC STAGE 2 93 Octane : 345HP / 374LB-FT

STOCK POWER: 252HP / 273LB-FT