QS4 ECU
QS4 with AST (Adaptive Shift Technology). Plug and play with PS1 (Power Shifter)
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QS4 with AST (Adaptive Shift Technology). Plug and play with PS1 (Power Shifter)
The world's first and only adaptive quickshifter which allows you to shift up gears at constant or full throttle without the use of the clutch for ultra smooth up-shifts at any RPM
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