While the dollar-per-horsepower number of a blower, turbo, or laughing gas may outweigh the cost of building a thundering naturally aspirated combination, there's still the allure of a modular engine ...

In the modern-performance era, horsepower comes easier than it used to. A big breakthrough for Mustang fans came in 2003 with the 390-horse Cobra, which introduced factory supercharging to the Mustang ...