Classes:

Porsche:

S1: 968 (All), 911 Carrera 2 (964:1990-1994), Carrera 4, (964:1989-1994), RS America (1993-1994), 911 Carrera, (993:1995-1998), Boxster (986:1997-2004), Boxster S (986:2000-2004); Boxster (987:2005-On), Cayman (2006-On), Cayenne (9PA: 2003-On), Panamera (2010- On)

S2: Boxster S (987:2005-On), Cayman S (2006-On), 911 Carrera (996:1999-2005), 911 Carrera (997:2005On), 997S except X51 (2005-2009), 911 Carrera (991:2012-On), all except 991S, 911C2 Turbo (965: 1990-1994)

S3: 993 Turbo (All), 996 Turbo (Non-GT2), 997S X51 (2007-2009), 997S/GTS (2010-On), 991S (2012On), (All), Boxster Spyder, Cayman R, 996 GT2/GT3 (2002-2005), 997 GT2/GT3/GT3RS (2007-On), 997 Turbo/Turbo S (All), Carrera GT (980:2004-On)

P2: 911 Carrera 3.2 (1984-1989), 911 Speedster (1989), 911 Carrera 2 (964:1990-1994), Carrera 4 (964:1989-1994), RS America (1993-1994), 944S2 (All), 968 (All), Boxster (986:1997-2004)

P3: 911 Turbo (1976-1989), 911 Carrera, Carrera S, C4S (993:All), Boxster S (986:1997-2004), Boxster (987:2005-On), Cayman (2006-On)

P4: 911 Carrera (996:1999-2004), 997 (2005-On), 997S except X51 (2005-2009), 911 Carrera (991:2012-On), all except 991S, 911C2 Turbo (965: 1990-1994), Boxster S (987S:2005-On), Cayman S (2006-On)

P5: 993 Turbo (All), Boxster Spyder, Cayman R, 996 Turbo (Non-GT2), 997S X51 (2007-2009), 991S (2012-On), (All), 997S/GTS (2010-On), 996 GT2/GT3 (2002- 2005), 997 GT2/GT3/GT3RS (2005-On), 997 Turbo/Turbo S (All); Carrera GT (980:2004-On)

I01: Improved Automobiles (All 4 Cylinder, up to 1999cc; All; All 4 Cylinder, 2000cc up to 2699cc; All 4 Cylinder, 2700cc and above and All 6 Cylinder, up to 2399cc; All 6 Cylinder and above, 2400cc up to 3199cc; All 6 Cylinder and above, 3200cc and above; All Turbo/Supercharged 4 Cylinder; All Turbo/Supercharged 6 Cylinder and above)

M01:Modified Automobiles (All 4 Cylinder; All 6 Cylinder and above; All Turbo/Supercharged 4 Cylinder; All Turbo/Supercharged 6 Cylinder and above)

Non-Porsche:

ED1: Domestic brand vehicles that are also not Emod (i.e. Ford, GM, Chrysler street cars)

EE1: Non-Porsche European brand vehicles that are also not Emod (i.e. Audi, BMW, Ferrari, etc street cars)

EA1: Asian brand vehicles that are also not Emod (i.e. Lexus, Acura, Subaru, etc street cars)

EM1: "Emod" everything that is not a Porsche and heavily modified for racing purposes (i.e. probably arrives on a trailer) - note that heavily modified Porsches belong to class M01