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Indigo-GT is an Authorised APR Dealer bringing you the complete range of APR Software and Hardware for Audi, Porsche, Seat, Skoda and Volkswagen.


APR LLC is an automotive engineering firm operating a 78,000 sq. ft. performance campus in Opelika, AL with 50+ employees. APR was founded in 1997 with a corporate philosophy of Innovation, Integrity, and Excellence. APR's Sole Mission is to provide the highest quality and most highly engineered aftermarket performance products available for Porsche, Audi and Volkswagen vehicles.


APR has a global reputation for providing high end performance software supported by an array of hardware options including intercoolers, exhausts, air intakes and alloy wheels.





You can book online using the following link, don't worry if you're not sure how much your remapping package will cost or what stage you require, we'll be in touch on receipt of your booking (during business hours) to discuss your needs and confirm the details of the booking including the cost, please ensure you provide us with your best contact number during the booking.

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ECU's are powerful, but extremely difficult to master. Without mastery, the ECU must be simplified, removing what makes it so desirable. The result is an incomplete product that often requires end user adjustment to maximise output in limited scenarios. On the contrary, APR’s Engineers spend years mastering ECU's to unlock their full potential. With complete access to the thousands of maps, tables and variables within, as well as a high-level understanding of how it works, APR’s Engineers are able to take advantage of everything ECU's have to offer. Power is maximised in nearly all scenarios, eliminating the need for end user adjustments. High performance operational modes are enabled and calibrated to deliver smooth daily driving, with a snappy and responsive throttle during moments of spirited driving. Mastery of the boost control system makes for an impressively predictable driving experience as the turbo spools quickly, delivering instant power, while torque-by-gear helps with traction control and protects the engine from being lugged out in tall gears. Lastly advanced high-output protection routines are enabled, allowing the ECU to make constant adjustments to airflow and fuel to cool and protect the engine, all without the driver knowing otherwise.

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APR ECU Explorer

APR’s proprietary ECU Explorer gives APR’s Calibration Engineers unparalleled access to the vehicle’s entire engine management system. Typical commercially available data logging tools, used by most tuners, only allow logging up to 12 engine-operating variables at extremely low data rates. These tools are also limited to a small, specific list of variables. APR’s ECU Explorer is capable of logging every variable found within the ECU with far more variables logged at once, at very high data rates.

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APR ECU Composer

APR’s proprietary ECU Composer is used for altering the engine management system. With full access to every table, map and variable within the ECU, APR’s Calibration Engineers are not limited to a handful of maps as is common for most tuning companies.

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APR ECU Assembly

APR’s Electrical Engineers have the ability to alter the code structure of the ECU. Through code levels changes, APR's Engineers are able to add features to the ECU. Other changes allow higher torque limits than those achievable through only modifying calibration data or using piggyback devices as is the case for many tuners. On the highly modified end, this often allows APR to make turbo upgrades operate without the need for external manual controllers.



APR’s Enhanced Modular Chipping System (EMCS) are optional features that bring switchable programs and features to certain ECU's, without the need to purchase external hardware switching devices. EMCS has the ability to completely rewrite the entire operating map data within the ECU, giving each program mode a completely different set of calibration changes. On this platform, this is contrary to the industry norm of capping limits, using multipliers, only swapping portions of a base calibration, or relying on knock activity to lower output. APR’s EMCS features and programs modes are activated via the factory OEM cruise control buttons, and optionally through APR Mobile. The vehicle’s cruise control will function normally while driving.


Program Switching

Program switching allows the user to cycle through up to four different engine calibrations and operating modes all without the need for external hardware.


Stock Mode

By selecting stock mode, the ECU calibration is reduced to factory load levels, limiting performance.

... APR Performance Modes

APR's octane-specific calibrations are available for various premium and race fuels around the world. Each performance mode is a completely new calibration, altered specifically for the characteristics of the fuel quality selected.


Fault Code Erase

Fault code erase allows the user to erase and reset engine related trouble codes and ECU adaptation data without using a speciality tool.


Security Lockout

Security lockout prevents unauthorised individuals from using APR's EMCS functionality. When enabled, APR's EMCS features will appear completely invisible until a user specified 2 to 4-digit security code is entered.

... Anti-Theft

When activated, Anti-Theft prevents normal operation of the engine even if the factory key is used. The vehicle will be completely immobilised until a user specified 2 to 4-digit security code is entered.

... Valet Mode

APR's Valet Mode protects your vehicle from becoming an expensive toy for unauthorised individuals. By enabling Valet Mode, the vehicle's performance is extremely limited.



The following features and improvements may not be applicable to every supported model, contact us for more information on model specific features.

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APR Direct Port Programming

APR’s DirectPort Programming is available at Indigo-GT, this grants us direct access to APR’s latest ECU upgrades for loading directly over the vehicle's OBD-II port. This completely eliminates the need to remove and open the ECU for currently available files and can be uninstalled at any time!


Acceleration Enhancements

Beyond horsepower and torque enhancements, APR’s Calibration Engineers work to increase the acceleration rate of the vehicles through other calibrations changes. Wehere applicable, ignition delay is reduced resulting in a more responsive pedal without altering overall throttle sensitivity. Furthermore, throttle lag commonly noticed at slow speeds and while reapplying throttle can be reduced.

    Speed Limiter

Where applicable, APR’s ECU upgrade increases the vehicle's top speed limiter for blistering sprints around the track or across the Autobahn without the speed limiter shutting down the fun.


Left Foot Braking

APR's Left Foot Braking feature allows more control over the vehicle’s throttle, on certain models the factory equipped vehicle's throttle input is disabled while pressing the accelerator and brake at the same time. Left Foot Braking, a common motorsport driving technique, allows the driver complete control over the vehicle’s throttle and braking system, which may give the vehicle the edge it needs at the track.


Increased Fuel Economy

On certain models APR’s Calibration Engineers pay close attention to several parameters directly related to fuel economy, especially while cruising at highway speeds. Depending on driving style and fuel quality, better miles per gallon may be achieved.



APR Mobile is a simple yet powerful tool designed to enhance the APR tuning experience.

APR Mobile installs on smart phones, tablets and other devices and provides a wireless connection to the vehicle’s engine control unit or ECU. Once connected, the device can be used to access APR’s EMCS program switching features, read and clear fault codes and data log the ECU at high data rates not found on other commercially available tools. The app can also be used to access APR’s latest news articles, locate dealers in APR’s network and review previously saved data logging sessions.


APR manufacturers a wide range of hardware, as an Authorised APR Dealer, the entire range is available to order through Indigo-GT.


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