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 ...

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 ...

Your car sounds the way it does because of a staggering number of factors, but some cars have one particular standout attribute that contributes so heavily to the sound, it's indispensable. In this ...

Having run our header test in the last issue on the normally aspirated version of the GT1000 motor, we were anxious to retest the motor with some boost. You will remember that the 5.4L GT1000 was ...