Mainly composites and alloys. Carbon fibre, kevlar and titanium are used throughout the body, chassis and drivetrain.
It is used because it is very light yet very strong.
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F1
How It's Made Dream Cars - 2013 Jaguar F-Type 1-9 was released on: USA: 22 August 2013
ford's focus
Modern day F1 cars can go up to 300 km/h.
The first season for the modern World Driving Championship for F-1 cars was 1950
Fiat Fiat
FordFerrariFiat
Toyota CamryHonda AccordFord TaurusHonda CivicFord FocusDodge CaravanJeep Grand CherokeeThe #1 selling vehicle was the Ford F-150 but you asked about cars so I did not include it.
The cars used in The Race of Champions are mandated by the race organisation and vary from year to year. For 2008, the six cars used were the ROC car, the KTM X-Bow, the RX150, the Ford Focus WRC, the Fiat Abarth 500 Assetto Corse and Solution F Prototype.
1 1/8" on my 1988 F-250
A good place to find cars is the Craigslist in your area. You can sort by keyword and price and it is constantly updated.