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Old 11-21-2011, 08:36 PM   #12 (permalink)
m4a1mustang
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Quote:
Originally Posted by omg35s View Post
How much do the 4.08 gears cost with installation? How much will my 1/4 mile improve by? How much MPG will I be losing if I'm cruising on the highway?
Assuming you have the grip to take advantage of the gearing, the 4.08s are probably good for a couple to a few tenths off your 1/4 mile time.

Highway mileage...

With the stock gear ratio, you are at 2,600 RPM in 6th gear at 70 MPH.

With the 4.08 ratio you are a hair under 2,900 RPM in 6th gear at 70 MPH.

You'll probably lose at least a couple mpg highway.

City mileage shouldn't change much at all.
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