Quote:
Originally Posted by JD001
UEL = no torque dip
EL = is the same as the stock header, no?
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Depends on the EL header design.
4-1 EL is more top end but retains similar torque curve as oem header. Then you have newer breed of 4-2-1 ELs like the JDL and ace header which bridge the gap and give you flatter torque curve while retaining good top end power.
They seem to prefer more custom calibration vs other headers. I went from Gruppe-S UEL to the JDL EL and the power delivery stayed linear.
Personally don't notice much difference in top end, at the very least having smooth EL sound with no torque penalty is enough for me.
