BS.

Just an air-vortex device.

-

It's possible they do other stuff during the installation to make it appear like it works, but typically, an air-vortex device does nothing.

-

If you want less smoke on a modern "Euro" emissions Crosswind, a simple blocking of the EGR works.

- - - - - - - - - - - - - - - - - - - - - -

BS.

Just an air-vortex device.

-

It's possible they do other stuff during the installation to make it appear like it works, but typically, an air-vortex device does nothing.

-

If you want less smoke on a modern "Euro" emissions Crosswind, a simple blocking of the EGR works.