During the early 1990s , Tech - Speed built .
During the early 1990s , Tech - Speed prepared various BMW M3 racing cars for teams in the championship , before withdrawing to compete in club - level racing due to the manufacturer dominance during the Super Touring era .
During the early 1990s , Tech - Speed built and prepared various BMW M3 racing cars for teams in the championship , before withdrawing to compete in club - level racing due to the manufacturer dominance during the Super Touring era .