+1 regarding pants feel better torque down low with EL. Can't say much regarding loss of rumble with EL, however I'm running lumpier cams than normal, giving it a bit of lump at idle, but a more piercing and less sluggish sound in the top end of the rev. range. No power values pre and post headers as it was part of an entire engine build.
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Air is for pussies.
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