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harley davidson does this .
but even they as of late have offered less full performance
tunes and more "street leagl" tunes.
but they work real good when only a free flowing air cleaner and free flowing exhaust is installed.often known as a stage one kit.
my self this would be great gmpp a, cai,cat back exhaust,and tune that will still enabe me to get past the inspection a/f test required once a year here in ny.and pick up a little more power and good sound...
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