best header
99redsi
02-26-2004, 06:06 PM
i have a '99 civic si...i looking for a header but can't decide...should i get a 4-1 or 4-2-1 header...who should i get one from...dc?
xproductionz
02-26-2004, 07:10 PM
honestly from what i heard dc is the best.... i also heard that you gain torque in the lower rpm with 4-2-1 and some HP gain also.. but get more torque in the higher rpm with 4-1 and even more HP gain than the 4-2-1....well thats what i heard.. i could be wrong so dont quote me on that
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