Complex sentence: There are other manufacturers competing as Privateer teams which don't represent the manufacturer unlike the TTR team which represents Toyota, such as the Evans Motorsport Team which uses a Subaru but isn't backed by the manufacturer.
Split into simpler sentences: There are other Manufacturers competing as Privateer teams which don't represent the Manufacturer unlike the TTR team which represents Toyota. Such as the Evans Motorsport Team which uses a Subaru but isn't backed by the Manufacturer.