I will keep a list of tunes I have done, as well as what page they are on here, it will be sorted by manufacturer in the same order as in your in game garage
Gran Turismo
Aryton Senna
Honda
Mazda
Mitsubishi
Mugen
Nismo
GT-R LM RGV (600pp, P1)
Nissan
Fairlady 280Z-L 2Seater (450PP, P1)
Spoon
Subaru
Suzuki
Tommykaira
TOMS
X540 Chaser(550PP,P1)
Toyota
Sprinter Trueno BZ-R(450PP, P1)
CELICA GT-Four Rally Car ST205(550pp,P1)
Lexus
Amuse
Opera Performance
RE Amemiya
TRD
Acura
Chevrolet
Corvette C7 Test Prototype (600pp, P1)
Corvette StingRay Racer(550pp, P1)
Chrysler
Dodge
Charger Super Bee 426 Hemi(550pp, P1)
Ford
Taurus SHO (450pp, P1)
Shelby
Pontiac
GTO 5.7 Coupe (600pp, P1)
Cadillac
Plymouth
AAR Cuda 340 Six Barrel (500PP, P1)
Cuda 440 Six Pack(550PP, P1)
Jay Leno
Buick
Callaway
Eagle
Talon Esi(450PP, P1)
Scion
Chaparrel
High End Performance
AEM
Tesla Motors
Stielow Engineering
Pozzi Motorsports
Fisker
SRT
Deltawing
Hudson
Aston Martin
Jaguar
Lotus
MG
TVR
Caterham
AC Cars
Land Rover
McLaren
Light Car Company
Audi
BMW
Mercedes-Benz
Opel
RUF
Volkswagen
MINI
Citroen
Peugeot
Renault
Avantime(450PP,P1)
R8 Gordini (450PP, P1)
Hommell
Alpine
Bugatti
Renault Sport
Alfa Romeo
Fiat
Lancia
Pagani
Cizeta
Ferrari
Lamborghini
Maserati
Abarth
Holden
Hyundai
Oullim Motors
Volvo
Seat
HPA Motorsports
KTM