All other vehicles that comply with the 2011 MSA Technical Regulations
Class B10: Over 1400cc up to and including 1600cc
Class B11: Over 1600cc up to and including 2000cc
Class H1: All Historic category 1 cars and category 2 and 3 cars up to 1600cc
Class H2: Historic category 2 and 3 cars with single cam engines over 1600cc
Class H3: Historic category 2 and 3 cars with multi cam engines over 1600cc
Class B12: Over 2000cc two wheel drive
Class B13: Over 2000cc four wheel drive cars that do not qualify for Class N4 or WR1
Class WR1: Over 2000cc four wheel drive cars with a sequential gearbox plus FIA S2000 cars

All forced induction engines (except diesel) are subject to an additional capacity coefficient of 1.7 to 1 (J.5.4.1)