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It depends on what you are trying to do. There is no set answer for all. UEL will tend to give a higher exhaust pulse every few exhaust strokes which can help turbos spool. EL tend to be higher flowing and less restrictive due to the timed exhaust pulses in the collector.
If you are staying na or supercharging, then the following will be more along the lines of where to look.
If you are doing nothing but staying in the upper rpm range and never in the lower, then check out the Ace 150, or if you are blown, then the Ace Anaconda 48mm.
On the other end of the spectrum, the Ace 350 is the most free flowing and gives great torque down low and power up top, but is LHD only. The Ace 400 Clubsport will provide torque low down, and fits both LHD and RHD.
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"Always listen to experts. They'll tell you what can't be done, and why. Then do it." - The Notebooks of Lazarus Long
Last edited by Spawn_Of_Creation; 11-29-2017 at 01:13 AM.
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