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cold air in
hot fuel (vaporizes much better and despite claims to the contrary - does not hurt power if accompanied by 1 above plus a reprogram)
an AEM or reprogrammed chip - for lean cruise and plenty of advance under vacuum, plus lean out to around 12.5:1 at WOT instead of the factory 10:1 +/- which is way rich.
Run Snows Performance water injection and run even leaner!
Run headers, 3" exhaust, and high flow cats
result will be more power everywhere than stock and much better cruise economy.
The problem is the money all that costs will buy you a lot of gas... so your choice.
If you did only one thing - get a rechip done to lean it out - they are pig rich!!! Leaning it out will make more power too but it may run hotter in some climates.
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