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Old 03-04-2013, 03:12 PM   #36 (permalink)
GarageLine.com
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I actually do have some input on this. If you keep the stock intake and filter in most cases you will not need a retune. The issue comes when you change the intake sytem. Most of them are made from off the shelf piping diameter which can been undersized. This will cause the car to run richer than normal.
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