Monza Sports Tuning have been involved in the tuning of Alfa Romeo ECUs since their involvement in the Alfa Romeo Championship back in 1998-2003. Bryn Griffiths dominated the production 2 litre class in 2001 and was Class E Champion and runner-up in the overall championship. He took 10 Class E wins and set eight new lap records at the ten circuits visited. In 2002 he took 11 wins, 2 seconds and 1 third place out of 14 races entered in a season of complete reliability for his Monza prepared Alfa Romeo 156. Bryn notched up his 21st class win on his way to his second Class E title!
In 2003, he was the first man to win a race in a Diesel in the UK (and possibly the world) in a race against petrol vehicles at Castle Coombe in Class F of the Alfa Romeo Championship. He was driving an Alfa Romeo 156 Sportwagon 2.4 JTD.