We've previously discussed header design; what about post-collector extensions? Most commonly seen on motorcycles and other small motors that are inherently peaky, a megaphone-shaped collector ...

Next to the suspension, the exhaust system of your gasoline-fueled four-cycle truck engine is perhaps the most misunderstood bolt-on performance combination on the market. The basic concept of ...

The smoother the transition from high exhaust pressure within a header's primary pipe to atmospheric pressure at the end of the pipe, the longer the reflected pressure wave's duration—and that makes ...

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 ...