On a 5.7 HEMI, shorty headers promise easy bolt-on power without turning your daily driver into a race-only project. The real question is how much horsepower they actually add compared with stock ...

We often try our best to get the most performance possible from our engines. In the search for more power, we often remove exhaust manifolds and swap them out for a set of headers. Available in ...

Although the perception is that today's new cars are computer controlled, making it difficult for the do-it-yourselfer to improve his or her car's performance, in actuality today's cars respond to ...