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The ZAC Motorsport M177 VTA (Vent to Atmosphere) Give your 4 litre BiTurbo engine that "blow-off" sound. The M177 has electronically actuated bypass valves that recirculate back into the airbox for near silent operation. With the ZAC Motorsport VTA adapters, the valves release the pressurized air to the atmosphere. There will be no check engine light , and no tuning or ECU calibration is required.
This product offers no performance advantage, and should not be confused or compared with our RPA system.
