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Old 10-16-2014   #5
asshanson
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Re: Will I need a tune?

Where is your air flow metering? Are you using a GM MAF near the TB, or a stock style one in the intake pipe?

I don't think an immediate retune is necessary, though you may benefit from a tune. One of the main attractions of a MAF system over Speed Density is that it compensates very well for airflow differences.
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