Muscle cars are usually referred to as a variety of high-performance automobiles. Its any group of American-made 2-door sports coupes with powerful engines designed for high-performance driving. A large V8 engine is fitted in a 2-door car, usually rear wheel drive, family-style ,mid-size or full-size car designed for four or more passengers. Sold at an affordable price, Muscle cars are intended mainly for street use and occasional drag racing.
The beast under the hood of a muscle car gives the "American Muscle" in Muscle cars. There motors are monsters with power and torque such as the Shelby’s 5.8-liter engine. This 650 horsepower engine is the most powerful V8 in production. It’s also 102 pounds lighter than its 5.4-liter predecessor. Engineers switched to an aluminum engine block, ditched the two-piece iron driveshaft in favor of a one-piece carbon-fiber unit, and replaced the heavy sleeves that guard the cylinder walls with a protective layer of atomized metal alloy. Now that's what makes an American muscle car one of a kind.
Although American muscle is fast, the Japanese are trying to keep up with high octane imported cars also known as tuner cars. Usually referring to the act of improving the performance or appearance of a vehicle, tuner cars, for actual "tuning" in the sense of automobiles or vehicles, see engine tuning. Most vehicles leave the factory set up for an average driver's expectations and conditions, tuning on the other hand, has become a way to personalize the characteristics of a vehicle to the owner's preference. Cars may be altered to provide better fuel economy, produce more