An exhaust system is a means to an end in most cases. Your hot rod has to have one to run legally on the street, and most of the time you want it hidden as much as possible up under the car. The ...

A new pipe is high up on most owners’ list of desired modifications. Swapping exhausts is usually pretty easy, but the job will vary based on the style of bike and the number/layout of the cylinders.

As much as we like the 5.9L Cummins powerplant, the stock exhaust manifold is constrictive and contorted, interfering with the flow of gases to the turbo and downpipe. That, in turn, can produce the ...