I have a 99 2.5L 5 Speed. 103k miles. I plan on doing the following mods; anything im forgetting? id like to stay fairly cheap, like leaving out a turbo/supercharger, and leaving engine internals the same. id prefer to gain MPGs as well. any advice appreciated!
1. CAI
2. Headers, high flow cat, catback
3.underdrive pulley
4.chip(any advice on good ones?)
5. maybe rear end swap? I have 3.73s

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99 2.5L 5 Speed 106k Miles
throttle Body Spacer, K&N drop in
Aftermarket Catalytic converter
Flowmaster Super 44, dual exits before rear wheels
Full synthetic fluids all around
Average 25mpg in warm weather.