T he next time you see a semi truck rumbling down the highway, pay attention to the vertical exhaust stacks rising up from behind the cab. These exhaust pipes aren't just for aesthetic purposes ...

Semi-trucks are an integral component to a healthy supply chain, ... compression, expansion, and exhaust strokes. When a Jake Brake is ... could legally tip the scales at up to 80,000 pounds.

The next time you see a semi truck rumbling down the highway, pay attention to the vertical exhaust stacks rising up from behind the cab. These exhaust pipes aren't just for aesthetic purposes ...