What does COPO mean? Discover the history of Chevrolet’s rarest muscle cars.

From March 17–21 this spring, State Farm Stadium will host one of the country’s premier collector car events, as the Mecum Auction rolls into Glendale, Arizona, bringing the roar of engines with it.

Fred served in the Vietnam war and is former fire captain. He is now having his fair share of fun in his heavily modified ...

The Four Rotor Corvette with a Wankel engine could have been Chevrolet’s first mid-engine version of the American sports car.

Celebrating a quarter-century in 2026, GM's Duramax diesel V8 has been powering the biggest, beefiest trucks produced by the ...

Sonny Leonard's Godfather big block engine broke through supposed barriers on its way to 1,005 cubic inches and 2,150 ...

How a rare muscle car utilized Chevrolet's COPO system to bypass factory engine limits, resulting in a factory-built, ...

A stock-based GM 4.3L V6 shocks the dyno with 1,400 horsepower at 33 PSI, proving this twin-turbo truck engine is far stronger than expected.

This mill has been quietly dominating for the better part of three decades, thanks to its durability and versatility.

Chrysler may have trademarked HEMI, but the Detroit carmaker did not invent hemispherical engines, which appear in numerous cars from Europe and the U.S.

Chevy big block engines represent the rawest side of American performance history. Long before turbochargers, complex electronics, and lightweight alloys became common, power was created the simple ...

Raw horsepower has always been part of Chevrolet’s identity. From smoky drag strips to weekend garage builds, Chevy crate engines give builders a shortcut to serious power without guesswork. These ...