We're getting an earful of the dual-mode active exhaust on the GMC Sierra 1500 pickup with the following exclusive video, showcasing the valves open and closed. News Podcast ...

A look into the exhaust gas recirculation, or EGR, valve - an important piece of the automotive emissions system.

With optional magnetic ride control, active exhaust, and four dynamic driving modes, the 2016 Camaro SS is ready to butt-heads with the 2015 Mustang GT.

Exhaust-valve timing: By controlling the camshaft timing independently, the engine controller can adjust the amount of overlap—the period when both the exhaust and intake valves are open.

In the early 1900s, the sliding sleeve valve engine had some advantages over tappet valve engines of the time. For example, sliding sleeve valve designs allowed larger intake and exhaust ports, a ...