The Mirage M6, introduced in 1972, was designed by Len Bailey with assistance from draftsmen Ken MacLeod. Gomm Metal Developments built the monocoque of L72 aluminum riveted and bonded from 18 and 16 gauge sheet.  A mild steel structure is used to hold the front suspension, steering rack and pedals.  A steel bulkhead was used to support the 3-liter Cosworth DFV V-8 engine which was used as a stressed member.

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In May of 1973 the teams contesting the Manufactures Championship gathered in Belgium at the Circuit National de Francorchamps for the fifth round of the series.  The teams would complete 71 laps of the 14.1 km (8.76 miles) track made up of public roads closed for the 1000km race.

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