Even though most exhaust manifolds are made of cast iron or stainless steel, they are not indestructible. Over time, they can crack due to constant, extreme temperature fluctuations, leading to ...
The little TBI four-cylinder in Hazel's '89 YJ has always ticked a bit from under the hood. Unlike the later 4.0L engines, the little TBI-injected 2.5L has a sturdier cast iron manifold. Although its ...
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 ...
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