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The 2.3 liter engine powered the M3 (which really was a middle class car compared to its rivals such as the Ford Sierra RS500) to the 1987 World Touring Car Championship, the 1987 and 1988 European Touring Car Championship's, the 1987 Australian Touring Car Championship, the 1988 British Touring Car Championship, and the 1987 and 1989-93 Italian Touring Car Championships.
Following the 1986 race, and as part of safety upgrades the circuit needed to bring it up to FIA standards for inclusion in the 1987 World Touring Car Championship, a chicane was added to Conrod Straight, eliminating the second hump which had long been seen as dangerous at the speeds the touring cars were traveling.