Quote:
Originally Posted by colushi808
Yeah that's why I dont understand ace headers website which recommends the different headers according to wheel size and gear ratios. 
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Im guessing it probably has to do with how long you stay in each gear. Longer gearing, stay in each gear longer, a more broad powerband would be better like the 350/400. Shorter gearing, stay in each gear less, a more peaky powerband would be better like 150/250.