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 ...

When it comes to car mods, exhaust headers are a common place to start. But what exactly makes them different from stock ...

No matter how good a car looks from the curb or on the show field, everyone wants to look under the hood. Today, engine bays look better than they did any time after the first oil change, thanks to ...

One area of engine science that shows positive returns is the exhaust system, particularly from the cylinder head to the muffler. It's been proven over and over again that headers add big power, so ...

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 ...

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 ...

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 ...