Pack adds in traffic 186 sport and super cars: 

AC 378 GT Zagato
Acura NSX('05, '17), Integra, RSX
Alfa Romeo 4C, 8C Competizione
Arash AF10
Ascari A10, KZ1
Aston Martin One 77, DB9 Volante, Rapide, Vulcan, Vantage ('98, '18), Virage, Vanquish '01, DB7 Zagato
Audi R8('10, '19), TT('04, '09, '16)
Bentley Continental Supersport
BMW i8, Z3(E36/8), Z4(E86, E89, G29), Z8, 8(G14)
Bugatti Veyron, Chiron, EB110, Divo
Chevrolet Corvette '14, Camaro '02
Chrysler Crossfire
Devon GTX
Dodge Stealth, Viper '03
Donkervoort D8 GTO
Falcon F7
Ferrari LaFerrari, 612 Scaglietti, GTC4Lusso, California, F40, F50, Enzo, 360 Modena, 458 Italia, F430, F355, FF, 599 GTO, 812 Superfast, 488 Pista, F12berlinetta
Fisker Karma
Ford GT('06, '17)
Ginetta F400
GTA Spano
Gumpert Apollo N
Hennessey Venom GT
Honda S2000, CR-X Del Sol, CR-X '91, Prelude
HTT Plethore LC-750
Hyundai Tiburon, Genesis Coupe('10, '13)
Icona Vulcano
Italdesign Zerouno
Jaguar XJ220, F-Type, XK('02, '10)
Kepler Motion
Koenigsegg One:1, Regera, CC8S
Lamborghini Gallardo LP 560-4, Diablo, Veneno, Aventador, Centenario, Murcielago, Reventon, Countach
Lexus LFA, SC430, LC500, SC300
Lotus Exige S Roadster, Evora, Elise('99, '05), Exige '06, Espirit '02
Lucra L148
Maserati Gransport, GranTurismo, MC12, Spyder
Mazda RX-7, RX-8, MX-5('94, '07)
Mazzanti Evantra
Mercedes-Benz SLS AMG GT, SLK(R171, R172), SL(R230, R231), SLR McLaren Roadster, AMG GTR, CLK63 AMG, 190 Evo II
McLaren 570S, P1, 720S, F1, 12C, 675LT
Mitsubishi Eclipse('03, '12), Starion, 3000GT
Morgan Aero SuperSports
Mosler MT900
Nio EP9
Nissan GT-R, 370Z
Noble M600, M12
Pagani Huayra, Zonda
Panoz Esperante
Pininfarina Battista
Pontiac GTO, Solstice, Firebird '02
Porsche 911(997), 718 Boxster, Carrera GT, Cayman(981), 959, 944
Rezvani Beast Alpha
Rimac Concept One, C Two
Rossion Q1
Saleen S7
Saturn Sky
Savage Rivale Roadyacht
Sbarro Alcador
Scion FR-S
Scuderia Cameron Glickenhaus SCG003
Spada Vetture Sport Codatronca
Spyker C8 Aileron, C12 Zagato
SSC Ultimate Aero
Subaru Impreza WRX STI(GD, GV)
Toyota Celica('92, '94, '03), Supra('92, '98, '19), MR2('89, '95, Spyder)
TVR Sagaris, Tuscan, Typhon
Ultima GTR
Vencer Sarthe
W Motors Fenyr Supersport, Lykan Hypersport
Wiesmann MF3
Zenvo ST1

All standalone. 
Works on any maps.
Compatible with AI packs by Jazzycat.
For version 1.38.x
Included two versions: for use only with default traffic and for use with Jazzycats AI pack.
You must have in mod folder two files:
 sport_cars_traffic_pack_by_TrafficManiac_v7.1_ats_base.scs
and
 sport_cars_traffic_pack_by_TrafficManiac_v7.1_ats_def.scs    (only with default traffic)
or
 sport_cars_traffic_pack_by_TrafficManiac_v7.1_ats_jaz.scs    (with Jazzycats AI pack)
If you want to have many sport cars everywhere use only one file:
 sport_cars_traffic_pack_by_TrafficManiac_v7.1_ats_base.scs

Version 7.1 - added Lexus SC300 and Subaru Impreza WRX STI(GD) '05