The Haldex Performance Controller is a total replacement of the mechanical and electronic controller that directly affects how the RWD portion of the Audi quattro system works and how aggressively it reacts under acceleration, cornering and braking.

This new product is a complete self-contained unit that encloses both the Haldex ECU and the Haldex Valve Control Assembly. This new performance upgrade is a full aluminium assembly with the latest Haldex performance ECU software, and features an upgraded Primary Valve controller.

The Haldex Primary Control Valve Assembly

This upgrade increases torque transmission at acceleration providing consistent performance with increased over-steer. The torque-transmission is influenced by how fast you press the accelerator down. The Haldex system can transmit torque before the engine delivers torque. At greater speeds the torque will decrease enabling less over-steer and safer driving properties.

The advantages of this HPP upgrade are its ability to predict the onset of torque. It takes into account the TPS signal more so than the OEM software and therefore can proactively begin applying power to the RWD clutch packs before wheel spin begins.

As power is increased, more power lock occurs in the RWD unit until full lock is achieved. To summarize, the new Haldex unit is more aggressive with how it transfers power and does so much more proactively than the OEM system.

- increases torque transmission at acceleration
- provides consistent performance with increased over-steer
- torque-transmission is influenced by how quickly you depress the accelerator
- transmits torque before the engine delivers torque
- at greater speeds the torque will decrease enabling less over-steer and safer driving properties

This is ideal for autocross, road racing, and street driving as well as enhancements to poor weather driving.

Haldex Integration

All OEM Audi security systems are retained and work as originally designed. The ABS braking system or engagement of the ESP is not disturbed with the upgraded Haldex system. Economy at highway cruise conditions is retained by still enabling the transfer of primary power to the front wheels when cruising.

The Haldex performance  kit for your Audi comes complete with the plugs (two) that fit right into the OEM connectors, replacement bolts and a gasket for a simple clean installation (As above image) 

Haldex Switchable Stock/Race/Eco Controller - For Gen 2 and Gen 4 Performance Controller

While sharing the OE and RACE modes of the Generation 2 controller, the latest  Haldex Generation 4 controller replaces SPORT mode with ECO mode.

Eco mode was developed for increased fuel efficiency. Its purpose is to reduce the torque transfer from front to rear during normal highway driving (coasting), but will immediately engage the system if a wheel starts to slip to prevent decreased traction situations.

Unleash the switchable functionality of your Gen 2 or Gen 4 Performance Controller with the addition of this accessory item. Now the driver can change programs on the fly with a flick of the switch or button.

The cable can be installed to position the switch in your choice of location. Popular options include cable loom that runs below the ash tray in the center console, or a wireless remote controller. With the installation of a specially engineered wiring harness and switch, you can have instant access to all three of the programs built in to the controller; Stock, Race, and Eco.

Audi Owner's View

We were amazed at how dramatically the Haldex controller improved handling in our test car. With Haldex technology an integral part of Audi's quattro drivetrain in many cars, these folks with inside knowledge of how the quattro system really works have come up with an improvement that real drivers will feel and immediately love.

This is one of the best bang-for-bucks upgrades for your Audi. Give it a try today.