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Stealth 4.0
Why our Stealth Controller works.


Most new cars are equipped with a drive-by-wire system. Throttle response can be negatively affected as drivers feel a noticeable delay when accelerating. This delay may be caused by faulty components, by design (lazy engine developers, decreasing emissions by not allowing an old engine design to do anything harsh), or by emission controls affecting the process. Before car emissions became a general health concern, carburetors had an "accelerating pump" which made the fuel mix richer when the accelerator pedal was depressed suddenly. The resulting hydrocarbon emissions from exhausts are the main reason that emission controls became mandatory, and most petrol-engined cars operate on average in stoichiometric mix mode. Some engine manufacturers are resigned to the fact and offer lacklustre performance engines. R&D costs of engines that conform to emission legislation, while still offering desirable throttle response, is one of the many reasons why the number of engine manufacturers for personal cars has drastically shrunk in the past 30 years.


On a closed drag strip or race track, a side by side comparison using the same vehicle, same driver, but one with a Stealth controller and one without a Stealth controller will result in a quicker time for the vehicle fitted with Stealth controller. When you open the throttle it responds by sucking in more air and adding more fuel. The power increase is caused because of your RPM's rise. The faster your RPM's rise the faster your car can reach max power.

The Stealth series of Controllers are the only Controllers made in Australia using parts from Australia and the USA.


The purpose of the Stealth is to eliminate throttle lag and give your vehicle much crisper acceleration. We have seen 1/8m times improve by 0.32 seconds (please note, this is not 1/4m, it was on the 1/8m which makes it more impressive).

The Metal Edition is the next generation of controllers, everything good in the Stealth Controller has had a major revamp, with an entirely new look and some serious internal modifications for the ultimate reliability and performance!
- Polished Aluminium Casing
- Glass screen with anti-scratch lens
- 13 performance modes (for even more performance)
- 3 Fuel Saving modes
- 3 Anti Abuse Mode
- Anti Theft Mode (much more secure, deactivates the accelerator)
- Auto IQ Mode Ver2
- Voltage reader (acts like a voltage gauge)
- German chip is reprogrammable to suits 95% of ETB equipped cars, upgrading vehicles? No worries will work on your next!
- 2 years warranty
- RPM INCREASE MODE, increases RPM's without your foot on the pedal, for off-road winching, jump-starting, as a launch control feature etc.

Subaru Stealth Controller Performance Tune

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