1989 Tooheys 1000

The pair lead almost the whole of the race and was only seriously threatened by the Allan Moffat run Sierra of German drivers Klaus Niedzwiedz and Frank Biela.

The Tooheys Top Ten runoff for pole position was notable for Peter Brock discharging his Ford Sierra's engine bay Halon gas fire extinguisher which was angled across the intercooler substantially boosting the power of the engine in the crucial drive up the mountain straight.

Class 1 (Over 2501cc)[2] featured the turbocharged Ford Sierras, Nissan Skylines, Toyota Supras and Mitsubishi Starions, the V8 Holden Commodores and BMW 635CSis.

The fastest Holden was the #16 Holden Racing Team VL Commodore SS Group A SV of Larry Perkins and defending race winner Tomas Mezera in 11th with a 2:19.11 set by Perkins, missing out by only 0.01 seconds to Bagnall's Sierra.

* 1989 saw the first and so far only time where every car in the Top Ten runoff was powered by a turbocharged engine, with nine Sierra RS500's and the lone factory Nissan Skyline of Jim Richards making up the 10 runners.