Ok, we've done header tests in the past, comparing various styles and sizes on moderate to high-powered street-style mills. In the case of the big-block Mopar, the default favorite tube size has long ...

Like many of those building a classic truck, installing an exhaust system is more complicated and deserves more thought than merely visiting the local muffler shop. Engine swaps, transmission, and ...

For all intents and purposes, an automobile engine is basically a large mechanism that moves air. The engine needs to be able to breathe in order to provide optimal performance. This is why, when ...

Put your hat down and wet your whistle pardner, because this story's about a bunch of hot air. We all know the airflow in and out of an engine is what the horsepower game is all about. Taller intake ...

There's a lot to be said for the deep throaty sound of cool Flowmaster mufflers barking out a tempo from a hot Chevrolet mill. At idle, there's the patented sound of Flowmaster mufflers in all their ...