I have been trying to find out what is normal number for Knock at WOT on the Highway I am getting up to 5 Degrees acording to the Aeroforce. I have the HEaders on now and it seems it takes longer to get to 5 at WOT but it still gets there. I know that I need to do the FWI to help that out but should I be worried about 5 degrees. In town it does not have any knock only on the High way is that weird?????