In automobile mechanics, the Quadrajet is a four-barrel carburetor

Carburetor

A carburetor , carburettor, or carburetter is a device that blends air and fuel for an internal combustion engine. It is sometimes shortened to carb in North America and the United Kingdom....

 made by the Rochester Products Division

Rochester Products Division

Rochester Products Division was a division of General Motors that manufactured carburetors, and related components including emissions control devices and cruise control systems in Rochester, New York...

 of GM that was widely used in General Motors

General Motors

General Motors Company , commonly known as GM, formerly incorporated as General Motors Corporation, is an American multinational automotive corporation headquartered in Detroit, Michigan and the world's second-largest automaker in 2010...

 motor vehicles until 1990. Its last application was on the Oldsmobile 307 V8 engine, which was last used in the Cadillac Brougham

Cadillac Brougham

Originally an enclosed carriage, drawn by a single horse, for 2-4 persons, “Brougham” owes its name to a British statesman, Henry Brougham, 1st Baron Brougham and Vaux, whose second claim to fame is having given to the sea-front drive, in Nice in the South of France, the nick-name of Promenade des...

 and full size station wagons made by Chevrolet

Chevrolet

Chevrolet , also known as Chevy , is a brand of vehicle produced by General Motors Company . Founded by Louis Chevrolet and ousted GM founder William C. Durant on November 3, 1911, General Motors acquired Chevrolet in 1918...

, Pontiac

Pontiac

Pontiac was an automobile brand that was established in 1926 as a companion make for General Motors' Oakland. Quickly overtaking its parent in popularity, it supplanted the Oakland brand entirely by 1933 and, for most of its life, became a companion make for Chevrolet. Pontiac was sold in the...

, Oldsmobile

Oldsmobile

Oldsmobile was a brand of American automobile produced for most of its existence by General Motors. It was founded by Ransom E. Olds in 1897. In its 107-year history, it produced 35.2 million cars, including at least 14 million built at its Lansing, Michigan factory...

, and Buick

Buick

Buick is a premium brand of General Motors . Buick models are sold in the United States, Canada, Mexico, China, Taiwan, and Israel, with China being its largest market. Buick holds the distinction as the oldest active American make...

.

The Quadrajet is a "spread bore" carburetor; the primary venturi

Venturi

-People:*Giovanni Battista Venturi , physicist*Ken Venturi , professional golfer*Remo Venturi , Italian motorcycle racer*Rick Venturi , American football coach*Robert Venturi , architect...

s are much smaller than the secondary venturis.