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Seems like a lot of work to get 1 mile to the gallon better fuel mileage on the highway??




What calculation are you using? The o/d will drop rpm with 3.73 rear gear and 28" tire as follows

stock 1:1 = 3133 RPM
.78 = 2433 RPM
.70 = 2193 RPM

Is that accurate that 700-900 rpm drop would only be 1 MPG?

-C