From the listing for this Porsche Race Car for sale:

From wikipedia:

In its debut in the 1966 24 Hours of Daytona, the Carrera 6 finished 6th overall, and won its class against Ferrari Dino 206 Ps. At the 12 Hours of Sebring, Hans Herrmann/Gerhard Mitter finished fourth overall and won the class, as at the 1000 km of Monza.

906s recorded class victories at the 1000 km Spa and the 1000 km Nürburgring and a privately entered 906 secured an overall victory at the 1966 Targa Florio when the factory cars failed.

At the 1966 24 Hours of Le Mans, the 906 placed 4-5-6-7 behind three Ford GT40 Mk IIs, outlasting all of the previously dominant V12-engined Ferrari Ps.