In 1986 Porsche finally offered the slantnose, called Flachbau in German, straight from the factory.

The official designation in the UK was Turbo SE and it is also sometimes referred to as the flatnose.

Offered as the ultimate 930 Turbo, this model had an upgraded body and a 330bhp engine.

Costing nearly double the standard model, the Flachbau was rarely ordered.

Before 1986, Porsche had offered the Flachbau body option from its customer service department known as Sonderwunschen.

These were handmade cars, not limited to just the Turbo, but the Carrera and Carrera SC as well.

In the 1987 model year, these were put into production with the M505 code for USA for an astounding $23,244 extra and M506 for the rest of the world.

Despite the panels being slightly heavier, they were modelled after the 935 race car for top speed.

The conversion required extended rocker panels, wider rear flares with scooped vents and flip-up headlights up front with functional louvres.

With a jump in h...