Here are the biggest engines ever shoehorned into an American production model

The first mass-produced American automobile was a 177ci ( 2.9-liter ) inline-four that made 20 horsepower, with a top speed of 45 mph .

The 426ci Hemi came out in 1964 for racing purposes, known familiarly as the "Elephant engine," and found its way into production vehicles by 1966 .

The 1967 Corvette Sting Ray is considered the best of the C2 second -generation and if it had the L88 427 Tri-Power engine, it was the ultimate American performance machine.

Mopar muscle cars were known for two engines: the 426 Hemi and the 440 .

The 440 was the largest Chrysler RB-series engine.

The W-series Mark IV LS-6 454 was rated at 450 horsepower and 500 pound-feet of torque.

The 1970 GSX 455 Stage 1 produced the most torque of any American performance car until the Dodge Viper beat it 33 years later .

The 8.1-liter Vortec 8100 L18 big-block V-8 was introduced by GMC in 2001 as a truck engine.

Cadillac 's 500ci 472-Series was also a 472ci in that series, hence the name.

At 8.4 -liters (511.5ci) the Viper VX I V-10 is the largest engine ever put into an American production model.