Optimum exhaust flow is critical to maximizing the efficiency of any engine. After all, an engine is just a sophisticated air pump – and the easier it is to move air in and out, the more efficient the ...

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 ...

Now that we have a better understanding of why headers work, the question now becomes do they work in the presence of boost? To find out, we decided to run a series of tests by comparing headers ...

After finishing his post-graduate work in English and Language Studies, Morgan served as an editor and copywriter for a range of trade magazines, including infrastructure maintenance, natural resource ...

The engines that power the vehicles we drive are exceptional machines. They're capable of generating insane amounts of power in a relatively confined space, and they can generally be expected to ...

No matter how many times we test them, it still amazes us how easy it is to make power with GM's LS series of engines. Even something as ordinary as a high-mileage 5.3L will respond to boost, and do ...

Exhaust systems are designed to survive years of heat, vibration, and road grime, yet some of their most important parts deteriorate so gradually that drivers rarely notice until performance or safety ...

The exhaust system heats the tailpipe because the exhaust gases go straight from the engine into the exhaust manifold, and the temperature of the whole system becomes pretty high. However, only some ...