Autocross Classes 2024 These classes only apply to STOCK (unmodified) cars. Generally the only allowed modifications per SCCA rules is one anti-sway bar, and Cat-back exhaust. See the SCCA Solo rule book for more details. Class P-SS 718 Boxster S, GTS & GTS 4.0 & Spyder (2017-22) 718 Cayman S, GTS & GTS 4.0 (2017-22) 911 (991 chassis, incl. GT3, Turbo; excl. GT2, GT3 RS, & Turbo S) (2012-19) 911 Carrera (992 Chassis excl. Turbo, Turbo S, GTS, & GT3)(2020-22) 911 GT3 (991.2 chassis) 911 GT3/GT3 RS (996 & 997 chassis, excl. 4.0L) 911 Turbo (997 chassis; non-GT2)(2006-12) 911 Turbo & 911 Turbo S (996 chassis) (2001-05) 911 Turbo (993 chassis) (1995-99) 911 Turbo (964 chassis, non-S, non-3.6S) (1989-94) 911 Turbo (930 chassis) (1974-89 ) Boxster Spyder (2011-13, 2016) Cayman GT4 ( non-Clubsport ) (2016) Cayman GT4 (excluding RS)(2020-22) Cayman R (2012) 718 Boxster GTS 4.0 & Spyder(2017-24) 718 Cayman GTS 4.0 (2017-24) 911 (GT3, Turbo; excl. GT2, GT3 RS, & Turbo S) (2012-19) 911 (991.2 chassis, incl. GT3, Turbo; excl. GT2, GT3 RS, & Turbo S) (2017-19) 911 Carrera (992 Chassis excl.Turbo, Turbo S, GT3, GT3RS,Dakar, & Sport Classic (2020-24) 911 GT3 (991.2 chassis) 911 GT3/GT3 RS (996 & 997 chassis, excl. 4.0L) 911 Turbo (997 chassis; non-GT2) (2006-12) 911 Turbo (993 chassis) (1995-99) 911 Turbo (964 chassis, non-S, non-3.6S) (1989-94) 911 Turbo (930 chassis) (1974-89) Boxster Spyder (2016) Cayman GT4 (non-Clubsport) (2016) Cayman GT4 (excluding RS)(2020-23) Taycan (all) (2020-24) Class P-AS 718 Boxster (base & T) (2017-24) 718 Boxster S & GTS (2017-24) 718 Cayman (base & T) (2017-23) 718 Cayman S & GTS (2017-24) 911 Carrera (incl. 4, S, 4S, GTS)(997 chassis) (2005-12) 911 Carrera, Carrera S, and GTS(991.1 chassis, excl. GT3, Turbo; excl. GT2, GT3 RS, & Turbo S) (2012-2016) 911 Turbo & 911 Turbo S (996 chassis) (2001-05) Boxster Spyder (2011-13) Boxster GTS (981 chassis) (2015-16) Boxster S (981 chassis) (2013-16) Boxster S (987 chassis) (2009-12) Cayman GTS (981 chassis) (2015-16) Cayman R (2012) Cayman S (981 chassis) (2013-16) Cayman S (987 chassis) (2009-12) Class P-BS 911 (996, non-turbo) (1998-2005) 911 (993, non-turbo) (1995-98) 968 Boxster (non-GTS, non-S, non-Spyder)(2013-16) Boxster (non-S) (2009-12) Boxster S (2005-08) Cayman (non-GT4, non-GTS,non-R, non-S) (2013-16) Cayman (non-S) (2009-12) Cayman S (2006-08) Macan (all) (2015-21) Class P-CS 356 Carrera (4-cam) 911 (non-turbo, NOC) 911 Club Sport 914 (all) 928 (all) 944 (16v) 944 Turbo (all) Boxster (986 chassis, all) (1997-2004) Boxster (987.1 chassis, non-S)(2005-08) Carrera 2 & Carrera 4 (964)(1989-94) Cayman (987.1 chassis, non-S)(2007-08) Class P-ES 924 Turbo (Audi engine) (1979-81) 924S (1986-88) 944 (8v) Class P-FS Panamera (2010-2023) Class P-HS 356 (non-Carrera) 912 924 (Audi engine, non-turbo)