HSR 2017 RACE / ENDURO CLASSES updated 2/17/17 Group Vintage Sports Cars & Sedans as produced and raced thru ~ 1967 Class Enduro E-class (VP) Vintage Production Cars, thru ~ 1967 2 All Over 3.0L; Corvette, Aston Martin, Ferrari, Jaguar 120/140/150, etc. VP/1 V V3 2 SCCA C-Production (early); Lotus Super 7, Elan, Europa, Ginetta G4, etc VP/2 V V3 2 SCCA D-Production (early); Porsche 356, 911 (FIA), 914, 914/6 (2.0L single plug), Yenko Stinger, etc. VP/3 V V4 2 SCCA E-Production; MGB, A-Healey 3000, Morgan, 912, TR4, etc. VP/4 V V5 2 SCCA F-Production; Spridget, Spitfire, TR3, MGA, etc. VP/5 V V5 2 SCCA G/H-Production; Spridget, Spitfire, etc. VP/6 V V5 2 Vintage Sedans (over 1.5L); Jaguar Mk II, Corvair, Volvo 544/122, Lotus Cortina, etc. S/5 V V4 2 Vintage Sedans (under 1.5L); Mini, Fiat, Abarth, Saab, etc. S/6 V V5 2 (VM) Vintage Sports Racing Cars (Modifieds), pre 1961 2 Over 3.0L; Lister, Scarab, Ferrari, Bocar, etc. VM/1 V V3 2 Under 2.0L; Porsche, Ferrari, Maserati, etc. VM/2 V V4 2 Under 1.5L; Lotus 11, Elva II-VI, Lola I, etc. VM/3 V V5 2 Under 1.2L; Lotus 11, etc. VM/4 V V5 (VSR) Vintage Sports Racing Cars, 1961 ~ 1967 2 Sports Racers, under 1.3L; Merlyn, Lotus, Bobsy, etc. VSR/3 V V3 2 Sports Racers, H-Modifieds, under 1.0L VSR/4 V V5 (SS) Street Stock Series 2 Street Stock Touring: (Firehawk, Escort, IT, Motorola, Luk, etc.) [may use Gr3 tires] see HSR Street Stock Category Rules SS/D V V4 2 Unspecified cars running in group but not eligible for awards, points or podium 2X V VX Group Historic Sports Cars & Sedans as produced and raced thru ~ 1985 Class Enduro E-class (HP) Historic Production Cars post ~ 1967 3 SCCA early B-Production; Sunbeam Tiger, GT350, Corvette 327, XKE (limited prep see special rules) HP/5 V V2 3 Later B-Production/GTU; Porsche 914/6 (2.2/2.4L), 911 (2.2/2.5L), Datsun 260/280Z, MGB/V8 (3.5L), etc. HP/6 V V2 3 SCCA C-Production (late); Porsche 911R 2.0L, 914/6GT 2.0L, Datsun 240Z, Lotus 26R, 47, etc. HP/7 V V3 3 SCCA D-Production (late); Jensen Healey, TR6, Porsche 914, 914/6 (2.0L, single plug), 924, 944, etc. HP/8 V V4 3 Early SCCA A-Sedan; (limited prep see special rules) 5.0L limit; Mustang, Barracuda, Valiant, Dodge Dart, Falcon, etc. S/2 V V2 3 2.5L Sedan; post 1972 specs (IMSA RS, SCCA 2.5 Challenge, etc.); VW Rabbit, Colt, Pacer, Gremlin, Charger, RX2/3, Vega, etc. S/3 V V3 3 SCCA B-Sedan; pre 1972 specs; Datsun 510, Alfa GTV, BMW 2002, Pinto, Toyota, Volvo, etc. S/4 V V4 3 Small-bore production [ProdCar] (post 1972 SCCA H/P, G/P, F/P specs-slicks allowed) H/PC V V3 3 Modified Production GT & Sedans; cars deemed appropriate for Gr. 3, modified beyond approved specifications MP/3 V V2 (SS) Street Stock Series 3 Street Stock Grand Sport; (Firehawk, Escort, IT, Motorola, Luk, etc.) see HSR Street Stock Category Rules SS/B V V2 3 Street Stock Sport; (Firehawk, Escort, IT, Motorola, Luk, etc.) see HSR Street Stock Category Rules SS/C V V3 (VSR) Vintage Sports Racing Cars 3 SCCA CSR/USRRC (1964~72) under 1.6L; Royale RP4, Bobsy, etc. VSR/1 V V1 3 SCCA E/F-Modified (thru ~1964) under 1.6L; Lotus 23b, Elva Mk 7/8, Merlyn, etc. VSR/2 V V1 (MSR) Vintage Sports Racing Cars 3 Modern Sports Racers: Spec Racer Ford, Toyota WSR, etc. MSR/3 V V1 3 Unspecified cars running in group but not eligible for awards, points or podium 3X V VX Group Formula / Open-wheel Class Enduro E-class (VF) Vintage Formula Cars Classic Monoposto (Monoposto Racing rules apply) {approved treaded tires} 4A Formula 1/2; pre 1973 VF/1 NA NA 4A Formula B; pre 1973 (1600cc) VF/2 NA NA 4A Club Ford; post 1973 (1600cc-spec tires) VF/3 NA NA 4A Formula Ford; pre 1973 (1600cc-spec tires) VF/4 NA NA 4A Formula Junior (rear engine) (1100cc) VF/5 NA NA 4A Formula Vee, Front engine FJ (1100cc) VF/6 NA NA HSR 2017 RACE / ENDURO CLASSES updated 2/17/17 (HF) Historic Formula Cars Class Enduro E-class Monoposto Formula 70 (1973 - 1979) (Monoposto Racing F/70 rules apply) {slicks} 4B Formula 1 / Formula 5000 / Formula A (over 2.0L) HF/1 NA NA 4B Formula 2 (2.0L) HF/2 NA NA 4B Formula B/Atlantic (1600cc) HF/3 NA NA 4B Formula C/Continental/Super Vee HF/4 NA NA (MF) Modern Formula Cars Modern Era Formula post 1979 {slicks} 4C F/1, Indy; post 1990 MF/1 NA NA 4C F/1, Indy; pre 1990 MF/2 NA NA 4C Indy Lights, F/3000, F/Holden, etc. MF/3 NA NA 4C F/2, Toyota Atlantic, etc. MF/4 NA NA 4C FF2000, F/Continental, etc. MF/5 NA NA 4 Unspecified cars running in group but not eligible for awards, points or podium 4X NA NA Group Historic Big-Bore Sportscars and Sedans Class Enduro E-class (HP) Historic Production Cars, 1967 ~ 1975 {listed treaded tires} 5 SCCA Historic A-Production; Corvette 454/427, Cobra 427, etc. HP/1 GTC GTC2 5 SCCA Historic B-Production; Corvette 327/350, XKE, GT350, etc. HP/2 GTC GTC3 5 IMSA GTU; Porsche 911 RSR, IROC (3.0L) HP/3 GTC GTC3 5 IMSA GTU; BMW 3.5 CSL, MGB/GT V8 (3.9/4.2L), etc. HP/4 GTC GTC4 5 IMSA GTU; Porsche 911 (2.7-2.8L) 914-6 (2.5L), BMW 3.0 CSL, RX7, etc. HP/5 GTC GTC4 5 Classic Trans-Am thru 1972 (5.0L); Camaro, Firebird, Mustang, Boss 302, Barracuda, Charger, Javelin, etc. HP/TA GTC GTC3 5 Limited prep sedans (over 5.0L); Mustang, Camaro, Firebird, etc. S1 GTC GTC4 (MP) Modified Production Cars, 1967 ~ 1975 {listed treaded tires} 5 Modified Production GT & Sedans, over 5.8L; cars deemed appropriate for Gr 5, modified beyond approved specifications MP/1 GTC GTC2 5 Modified Production GT & Sedans, under 5.8L; cars deemed appropriate for Gr 5, modified beyond approved specifications MP/2 GTC GTC2 5 Vintage NASCAR; pre-1981 ~ production body/frame SC/E NA NA 5 NASCAR Goody's Dash, etc. SC/F NA NA 5 IMSA 1975 - 1984 GTU under 3.0L (slicks permitted) GTU GTC GTC2 (SS) Street Stock Series 5 Street Stock Super Sport; (GrandAm-ST, Firehawk, Escort, IT, Motorola, Luk, etc.), see HSR Street Stock Category Rules SS/A GTC GTC4 Select USRRC/FIA World Sporstcar Championship coupes (listed treaded tires) 5 ASR/USRRC over 2.0L; Cheetah, Corvette GS, Corvair V8, Daytona Coupe, BT8, etc. V/ASR GTC GTC2 5 BSR/USRRC under 2.0L; Porsche 906, Elva BMW, Lotus 23c, etc. V/BSR GTC GTC2 5 Unspecified cars running in group but not eligible for awards, points or podium 5X GTC GTCX Group Historic / Post-Historic / Modern Era Prototypes Class Enduro E-class ( FIA) LeMans Prototypes / World Sports Cars / Daytona Prototypes 6 Current Pro FIA/IMSA Prototypes; Ligier, Audi R18e, Nissan, Toyota TS, Porsche 919, etc. PRO P P1 6 IMSA/FIA Prototypes (P1/LMP1/LMP900/LMGTP/SR1) post '98; Audi R8/10, Pescarolo, Peugeot 908, Lola B2K, etc. LMP1 P P2 6 IMSA/FIA Prototypes (P2/LMP2/LMP675/SR2/PC) post '98; Oreca, Porsche RS Spyder, Pilbeam, Lola, Courage, Acura, etc. LMP2 P P2 6 FIA World Sports Cars (WSC) '94-98; Ferrari 333SP, R&S III, Kudzu, Cannibal, Hawk, Spice, Chevron, etc. WSC P P3 6 GrandAm/IMSA Daytona Prototypes (Gen 3) '12-15; Corvette Coyote DP, Riley XXVI DP/1 P P3 6 GrandAm/IMSA (Gen 1/2) '03-11; Riley XI/XX, Doran, Crawford, Dallara, etc. DP/2 P P3 IMSA GTP / FIA Group C 6 FIA Group C, IMSA GTP; Nissan, Toyota, Jaguar XLR, Porsche 956/962, etc. GTP P P4 6 FIA Group C2, IMSA Camel Lights; Spice, Kudzu, Tiga, Alba, Argo, etc. GTPL P P5 6 Unspecified cars running in group but not eligible for awards, points or podium 6X P PX HSR 2017 RACE / ENDURO CLASSES updated 2/17/17 Group Historic / Post-Historic Sports Racing Cars {slicks} Class Enduro E-class (CA) Can-Am 7 Classic Can-Am/ASR; pre 1974, (over 6.5L) - {Slicks} CA1 H H1 7 Classic Can-Am/ASR; pre 1974, (under 6.5L) - {Slicks} CA2 H H1 7 Early Can-Am, USRRC (treaded tires); Lola T70, McLaren M1, Genie, McKee, Lotus 30/40, etc. {Approved Treaded Tires} CA3 GTC GTC1 7 Can-Am/ASR; post 1974, (2.0 - 5.0L) - slicks (center seat) CA4 H H1 FIA Championship of Makes 7 ASR/USRRC over 2.0L; FIA Gr 4/5, Championship For Makes Coupes thru 1974 (slicks) H/PT H H2 7 FIA Championship of Makes Prototypes thru 1974 (treaded tires); GT40, Lola Mk IIIb, Porsche 908/910/917, Mirage, etc. V/PT GTC GTC1 Historic Sports Racing Cars 7 Historic A Sports Racers (over 2.0L) H/ASR H H2 7 Historic B Sports Racers (under 2.0L); Chevron B19/21/23/36, Lola T212/292, Toj, etc. H/BSR H H3 7 Historic C/D Sports Racers (under 1.8L) H/CSR H H4 7 "Modern" Sports 2000 ~ post 1985 S2/A H H4 7 "Early" Sports 2000 thru ~ 1985 (includes Swift DB2) S2/B H H4 7 Modern "retro" GT cars; GT40, 917, 906, etc.