Touring Car Masters, 5 Round series, Any Classic pre 1980 vehicle that must have a visible interior and a race livery and basically the only vehicles not allowed are classic Lemans cars. Generally we will see Trans am Muscle cars and Aussie Muscle cars Classic Stockers (Revell Monogram) and perhaps some smaller classics Porsches, Escorts and the like, there is no restrictions on Motors or Tyres are open to Urethanes or Rubber the only main rule is that during heats and finals that lap time limit for the race will be set to 11.9 sec per lap so that allows guys that try more difficult cars to setup it does allow them to play with motors to help them get up to speed to some of the Scalextric Transam cars that are generally fast out of the box, so if a car does a 11.899 sec lap during a heat or final it will skip a lap. The 11.9 sec rule will not be enforced in qualifying though as cleaning tyres and 100% track power in Qualifying can sometimes make car laptimes a lot faster than lap during racing conditions. So beside car type and having an interior there is no other rules.