yes these mass produced OTS headers like dc and greddy are basically a one size fits all type deal. if it makes power, it'll be very little. if it doesnt, chalk it up as a lesson learned i guess.

but the top custom header makers, smsp, hytech, rmf, etc., custom build a header to your engine specs and power goals. taking into effect tube lengths, diameters, collector size, and cylinder pairing. all of which play a big part in the header making or losing power in the part of the powerband you want it.

my 2 pesos