Screw it, even with gas at $4 a gallon how much fuel would an OD save ? I agree 4,000 rpm on the freeway is much, with quieter mufflers it really helps out. I had 25 inch tires and 3.91's, got 26.8 inch tires in back this year, it help out, 20--30 min drives on the freeway are doable now. Might be doing a 3 hour ride soon, 65 mph is slow I agree but even $2,000 can go along ways on other enjoyments in life.