The stock cars used in NASCAR racing are equipped with power steering. This is one factor that differentiates the stock cars of NASCAR from IndyCars, which do not have power steering.
All NASCAR stock cars must meet a rigid set of specifications, so all cars are more or less the same. The exterior of stock cars and the engines under the hood are the chief differences. All cars have a front-engine, rear-wheel-drive layout. NASCAR allows racing teams to use V-8 engines with displacements no greater than 358 cubic inches. In 2012, NASCAR switched from carburetion to fuel injection. Modern stock cars achieve power ratings as high as 850 horsepower.