They aren't allowed to run in the small block class over here either. I made a few enquiries about class regulations and its the 2.2inch wheels that are the issue. I am a bit gutted as I was pretty set on creating a racer and was just about to order a Nova Rossi LS15S5 to power it. If I want to race the CEN, it would have to be in the stadium truck championship and that is not too popular over here and is mainly run in the south of the country.
I think it would be a good idea for CEN to develop wider/ stronger a-arms and perhaps redisign the diffs and drives to allow the use of maxx sized wheels. It is already a fast truck well capable of beating Revos and TNXs' but unfortunately we are not allowed to prove it!