PACCAR has patented a method for starting a vehicle’s engine that involves rotating the crankshaft while keeping the exhaust valves of the combustion chambers open before fuel injection. The engine ...

This story was originally published on cycleworld.com. Few elements have as large an impact on a motorcycle’s design as the exhaust system. From header to exit, the gently curving shapes help define ...

As much as we might like the sound and the fury of a big, open exhaust on our diesel engines, does it necessarily flow better than a high-performance aftermarket system? Sure, a big, bad diesel rumble ...