No, not really. The A/F ratio is not optimal, but it won't harm anything. A tune is not required but will help the the torque under different RPM's. I have HFC's, CBE, and short ram intakes and have never had a tune. I've dyno'ed... but no ECU tune (yet).
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Andrew
2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D
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