So to put all hidden items and tickets together (with added detail) :
Performance
(5, 10, 20) % Power Improvement
AYC Controller
Brake Balance Controller
Catalytic Converter Racing
Ceramic Carbon Brakes
Clutch Triple Plate
Flywheel Racing
Improved Accelerator Response
Large Diameter Discs + (4, 6, 8 ) Piston Calipars
Nitro (5,10, 20, 30, 60, 90, 120) Seconds
Stage (4, 5) Chasis
Stage (4, 5) Engine
(Super High, Ultra High) RPM Range Turbo Kit
Tyres
Comfort Hard (C, V) Tyres
Comfort Medium (C, V) Tyres
Comfort Soft (C, V) Tyres
Dirt (C, V) Tyres
Racing Hard (C, V) Tyres
Racing Medium (C, V) Tyres
Racing Soft (C, V) Tyres
Racing Super Soft Tyres
Racing Super Soft (C, V) Tyres
Rain Heavy Tyres
Rain Heavy (C, V) Tyres
Rain Intermediate (C, V)
Snow (C, V) Tyres
Sports Hard (C, V) Tyres
Sports Medium (C, V) Tyres
Sports Soft (C, V) Tyres
Sports Super Soft Tyres
Sports Super Soft (C, V) Tyres
Theme Tickets
Concept
D1 Grand Prix
Introductory
JGTC / Super GT
Le Mans 24Hr
Rally
Level Tickets
L25 to L40
Manufacturer Tickets
Acura
Alpha Romeo
Aston Martin
Audi
BMW
Chevrolet
Chrysler
Citroen
Daihatsu
Dodge
Ferrari
Fiat
Ford
FPV
Honda
Hyundai
Inifiniti
Isuzu
Jaguar
Lamborghini
Lancia
Lexus
Lotus
Mazda
Mercedes-Benz
Mini
Mitsubishi
Nissan
Opel
Pagani
Peugot
Pontiac
Renault
Shelby
Suburu
Suzuki
Toyota
TVR
Vauxhall
Volkswagon
Volvo
Other
Generic Horn Item
Generic Movie Item
Generic Museum Card Item