In the 1980s, Gemballa was the record holder for wide cars. Their 500SEC Mercedes was the widest money could buy in those days and Gemballa had very similar plans with the BMW 635CSI M-version. And why not? If something was expensive and it looked over-the-top, in the 80s there were customers for it.

Basically this 635CSI M was given the same wide body conversion as the Gemballa 500SEC Wide body with the same typical air ducts that should cool the huge rear wheels and brakes. The rims are 15" Ronal Racing Wheels sprayed to match the car's exterior. Gemballa also fitted a stiffer suspension to make sure the car could cope with the huge pieces of rubber it sat on. Gemballa usually made custom exhaust systems for their range of complete cars. Remember the six pipes on the 911 conversions (Cyrrus, Avalanche and Mirage), three pipes that protuded on either side of the car, or the four pipes on the wide SEC Mercedes and the 928 Porsche? Well, the regular 635CSI had their exhausts in the middle of the car, which was spectacular by itself, but the Gemballa couldn't do with less than four of these flame spitting concert flutes. Massive!! The exhaust note probably was quite different from the standard car.

Except for the wideness Gemballa cars were obviously know for their top of the range interiors. They were argueably the best custom interiors made in the 1980s. This BMW was no exception: onm customers request Gemballa fitted four fully adjustable Recaro C-Seats covered in fabric of choice. In the dash a TV could be installed and there was room left for a high end stereo (as seen on the yellow car).  Strangely this stereo was placed on the right-side of the TV, which made it rather impossible for the driver to operate it.

The conversion to wide body costed 150.000 DM. On top of the price of the base 635CSI M of 90.000 DM that was! So the whole package costed 240.000 DM. The yellow car was even priced at 275.000 DM and was bought by a customer from the U.A.E.