If the side exhaust fitting is the same as on the Plus 8 then it involves cutting a shape out of the lower edge of the running board and edging it with a poished stainless piece screwed through the running board.
The exhaust is then a 90 degree bend after the silencer extending out through the new cut out.
Advanced DIY and a one way trip.
After driving Aeros with both conventional and side exhausts I wouldn't have the side exhaust, the noise is wnderful, but wearing and for me, on a long trip, earplugs would be needed.
