His rookie year was a success though, with two podiums, two pole positions and a fastest lap en route to 11th overall in the championship.

Macdowall continued with Chevrolet in the British Touring Car Championship for 2011, ending the season 9th in the standings with 100 points and 3 podium finishes.

In February 2012 it was announced that MacDowall would race for bamboo-engineering in the WTCC for the 2012 season where his teammate would be Pasquale Di Sabatino.

His result in race one combined with two non-scores for Yokohama Trophy rival Franz Engstler elevated him to fourth in the standings, 12 points behind Stefano D'Aste.

He went into the final race weekend in Macau with a slim chance of taking the Yokohama Trophy title.

MacDowall competed in the GTE Pro category alongside former Bamboo teammate Darryl O'Young and experienced GT racer Fernando Rees.