Trans-Am Series
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| Category | Sports car racing |
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| Country |
 United States
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| Inaugural season | 1966 |
| Official website | www.gotransam.com |
 Current season
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The Trans-Am Series is an automobile racing series which was created in 1966 by Sports Car Club of America (SCCA) President John Bishop. Originally known as the Trans-American Sedan Championship it has evolved over time from its original format as a manufacturers championship for modified racing sedans to its current form as a drivers championship open to GT style cars.
The series was formed at the dawn of the pony car era and was derived from the SCCA's A & B Sedan amateur Club Racing classes, based upon commercially produced cars which had been modified for racing competition. Originally the series was open to FIA Group 2 Touring Cars and it featured two classes, Over 2.0 Liter and Under 2.0 Liter, with both classes running together. The series was best known for competition among American V8 coupes such as the Ford Mustang, Chevrolet Camaro, Plymouth Barracuda, Mercury Cougar, AMC Javelin, Pontiac Firebird, and Dodge Challenger in the 1960s and early 1970s. Marques such as Porsche (until its 911 was reclassed as a "sports car" and not a "sedan"), Alfa Romeo, BMW, Datsun, Mini Cooper, Saab, and Volkswagen competed in the series' Under 2.0 Liter category.
At first, the Trans-Am cars were modified versions of their road version. The competition was divided into two classes- an "Under 2-Liter" class (predominantly European sedans) and the "Over 2 Liter" class, 111 inch wheel base or less and displacement limited to 5.0 liters (primarily American pony cars).
The first race was in 1966 at Sebring International Raceway. The overall win went to Jochen Rindt driving an Alfa Romeo GTA (an Under 2-Liter entry), with Bob Tullius (driving a Dodge Dart) taking second overall and first in the Over 2-Liter class.
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