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Gears,Cat Back Exhaust, X pipe, K&N CAI, Dyno Tune, Short shifter, drop it with some springs. It's a good start and I would get them in that order.
with a 4.10 gears you would drive 80 miles an hour at 4K rpm i'd go 3.73? or whatever is close to that. Also get a 90 mm MAF and a chip with all that crap listed above and you'll be happy