American muscle car easily makes 300 hp from a naturally aspirated engine, and it's so affordable anyone can buy it.

The all-new 6.7-liter Cummins High-Output Turbo Diesel is rated at 430 horsepower and 1,075 lb.-ft. of torque. A redesigned block and head, robust heavy-duty pistons, new performance intake manifold, ...

Though many crate engines are V8s, there are a few examples of six-, four-, and even three-cylinder engines that deliver ...