In 1972, a good deal was done to improve the 911’s handling. Due to the 911’s rear engine, with the majority of the weight concentrated over the rear axle, early 911 models tended to oversteer. In an attempt to rectify this, the oil tank was relocated from behind the right rear wheel to the front of it. This relocated almost 8.5 kg of oil to within the rear axle, improving weight distribution and, thus, handling.
The 911 S models were given a discrete spoiler under the front bumper to improve high-speed stability. Weighing a mere 1050 kg, this 911 model is often considered the best, classic 911.
From 1970 to 1971, the 911 ST was produced in limited numbers for racing. It was given an engine of either 2466 cc or 2492 cc, producing 270 hp at 8000 rpm. With a weight of only 960 kg, the 911 ST had success at the Daytona 6 Hours, the Sebring 12 Hours, the 1000 km Nürburgring and the Targa Florio in Sicily.