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: These ...

I think I might have just found what is probably one of the greatest vans ever built. This 1991 Ford Econoline 350 is a dually conversion van. That alone would be radical enough, but the seller then ...

So you were driving behind a semi truck in slow traffic the other day and noticed something peculiar at the top of its tall exhaust stacks: small metal flaps that flip open with each rev of the engine ...

Peterbilt now offers a single exhaust stack for trucks with Caterpillar diesels that require an exhaust catalytic converter. The new configuration features a converter mounted on the vehicle's frame ...

TORONTO, Ont. — Plenty has changed since Ontario first rolled out its Drive Clean emissions tests in 1999, not the least of which is the cleaner air that passes through exhaust stacks. In the years ...

TORONTO, Ont. -- Plenty has changed since Ontario first rolled out its Drive Clean emissions tests in 1999, not the least of which is the cleaner air that passes through truck exhaust stacks. The ...