Blowers, tunnel rams, and single 4-barrel carbs are a dime a dozen these days, right? So what are you going to do to make your car different-and hopefully increase its performance at the same time?

At first glance, the Mustang Holley Model 4180 carb looks just like millions of other Holley carbs. But there are actually numerous differences that set this emissions carb apart from its predecessors ...

Westech Performance dyno tests a 383-inch stroker budget small-block pump-gas engine topped with three two-barrel Rochester carbs on a custom tunnel ram and makes over 400 hp!