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 ...

Upgrading the exhaust is one of the first steps many take when they want to boost their car's performance. One of most obvious choices in this regard is to install a header in place of the stock ...

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 ...

An integrated Exhaust Manifold, or "headifold," is an exhaust manifold cast into an engine's cylinder head and cooled by antifreeze. This type of design, where the exhaust manifold is no longer a ...

Bolted directly to the engine block, the exhaust manifold is the first section of a vehicle’s exhaust system. It funnels exhaust gases from all the cylinders and routes them to the car’s catalytic ...

If you were lucky enough to grow up around car enthusiasts, you've probably heard your dad, uncle, or brother say, "Nothing wakes up a V-8 like a good set of headers." And that's true—few Corvette ...

Our fearless editor, Ryan Manson, is a busy guy, so when he began building a 1952 Ford pickup and needed a long list of parts and wanted them fast Manson turned to America's oldest speed shop, ...

When Volkswagen's third-generation EA888 1.8-liter turbo four-cylinder engine came out, we noted a particularly unique feature that's somewhat uncommon in passenger car engines: The exhaust manifold ...