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 ...

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 ...

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 ...

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 ...

What is it about muffler shops and modified motoring that go so hand-in-hand? Now, I've never lived much outside of Southern California, so I've no clue how widespread the phenomenon really is. Around ...

Welcome back to our series on properly diagnosing mechanical problems rather than blindly chucking money at replacement parts hoping to stumble on a fix. Granted, a cracked exhaust manifold doesn’t ...

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 ...

When it comes to engine designs, Porsche loves to push the envelope. Yes, the end-result is usually something flat, but it still holds plenty of patents for ideas like nothing we've ever seen, like ...