For a GT with highway driving, I would agree with the 3.73s. I do a lot of highway driving also. Interesting enough I haven't suffered any loss in milage even going as high as 4.10s. GTs are a little different, but still, 3.73s are deffently worth it.
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'97 Cobra, K&N, Flowmaster, subframes, 4.10 gears, Steeda Tri-Ax shifter, Steeda G-Trac 3, Cobra R wheels w/ Goodyear F1s
My Ride