Seller notes

These brand new Zac Motorsport VTA (Vent to Atmosphere) adapters give your 4 liter BiTurbo M177-series engine that "blow-off" sound. The M177 has electronically actuated bypass valves that recirculate unused hot air back into the airbox when you let off the gas under boost for near silent operation. With these VTA adapters, the valves release the pressurized air to the atmosphere with the satisfying blow-off sound. There will be no check engine light, and no tuning or ECU calibration is required...

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