This is our E46 tunneled splitter. Made from 100% carbon fiber and a special composite foam core.
It has 2 large diffusers placed in front of the wheels to create a venturi effect, lowering the pressure on the bottom side. It also uses built in side flaps to aid in vortices along the side of the car as well as add to the effectiveness of the tunnels. They also double as a place to attach wheel spats.
This item is only lower splitter blade not the upper part pictured attached to the bumper cover.
