Bolting on an aftermarket intake manifold has long been the introduction to hands-on hot rodding. Improved looks, performance, and, often, fuel economy can be just an intake swap away. Not to mention ...

Seals McCarthy, one of Weiand's sales and technical representatives, holds the keys to more mileage, more horsepressure and more sight appeal. I'm race conscious—as in half, three-quarter, full and ...