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turbo is 550, the Na's i think are the same. they should fit (side feed) as long as the impedance is the same.
unless you are going turbo or big shot of N20 not needed. plus you will need a good tune
i plan on doing a turbo here very shortly. i am a little lost on the "side feed" thing along with the impendence u spoke of. could tell what exactly that means. thanks for the info though.
