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Just curious...I have an 04 GT manual and do drive on the hwy (not alot) but was wondering what kinda increase in rpm's i would see, say cruisin at 75 with the 3.55 and 3.73...stock 3.27 i'm at 2k....i heard 300 rpm increase per step up so that would be about 2600rpms at 75 with 3.73's..sound right??? I do want more aggressive gears, don't want to beat my stang into the ground, but a 600 increase isn't that bad huh? hell my old BMW was at atleast 3k with stock gears at 75...i drive about 30 miles on the hwy about 3 times a week and drive about 360 mi (round trip) to see fam and friends about once a month...I'm leaning towards 3.73's...thoughts??