What gains should I expect?
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I gained 4 tenths switching from 3.42's to 4.10's and that with a open diff both times. It would be pointless and I dont recommend driving/racing without a updated tune. Those 3.42's are gonna hold you back as far a performance unless your going SC and I would still get 4.10's then. I actually gained 1 or 2 mpg when I went to 4.10's!
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