 Complete the following phrase:  The EMKA Aston Martin was a Group C racing car built for EMKA Productions owner Steve ORourke by Michael Cane Racing and powered by an Aston Martin engine. The EMKA C831 was initially introduced in 1983 and competed in the 1983 24 Hours of Le Mans, finishing a respectable 17th overall. The car was modified for 1985 and raced at the 