Nick's video is one set of tests on one combination. That is all it is. It is not what everyone can expect on every combination. So, don't read too much into it. Nick's combo appreciated the headers more than most of the combos that I have swapped headers onto. But that doesn't mean he is wrong on that combo.

Frankly, I am a little surprised at the amount of debate on here that surrounds one test that almost all of us have done at one time or another. Most of us older guys have swapped manifolds for headers over the years. Some of us have done it many times.

This Engine Master's header dent test is even more interesting, IMHO: www.dailymotion.com/video/x3vupq0