In our last issue, we assembled a number of different 5.4 intake manifolds and compared them to the factory Navigator intake assembly on a modified 5.4L Four-Valve motor ("Factory Fast Vs. Advanced ...
Actually, the 4.6L Cobra motor is alive and well, for good reason. Though no aftermarket heads have become available, the factory stuff can be made to flow pretty well. With the proper porting, big ...
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