[Greg Hill]

There are a couple of things I have observed over the years about headers on my car that may or may not be true for others. #1 Is that a dyno is not the place to test headers. Mike Keown told me years ago a bigger header will make more power on the dyno but won't go down the race track like it shows on the dyno and that has been my experience. #2 is what I heard from a really good header builder and that was that the first 8 inches of the primary tubes were the most important part of a header and the size of the first step should match the port size. These are just my experiences on my car and probably aren't relevant for every one else.