Ok, we've done header tests in the past, comparing various styles and sizes on moderate to high-powered street-style mills. In the case of the big-block Mopar, the default favorite tube size has long ...

It's been a while, but we finally dragged out the Circle Track dyno mule for a new round of testing. This time around the idea came from a bench racing session where we were talking about different ...

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 ...