2003 Lancer ES Auto Engine Mods.
A ported RRM throttle body and AEM cold air intake would definitely add some power. And would you look at that... I have those parts for sale right now... 
https://www.evolutionm.net/forums/sa...y-aem-cai.html
But in all honesty, if you want power from your 4G94 engine turbo is the only way to go. The 4G94 doesn't yield the high results from bolt-ons that some people are used to with other manufacturers. One your Lancer is turbo'd at 7-10psi, it's a whole different ballgame.

https://www.evolutionm.net/forums/sa...y-aem-cai.html
But in all honesty, if you want power from your 4G94 engine turbo is the only way to go. The 4G94 doesn't yield the high results from bolt-ons that some people are used to with other manufacturers. One your Lancer is turbo'd at 7-10psi, it's a whole different ballgame.
It's stock right now but I have about $2,700 saved up for performance parts, but I'm debating on what to buy first and such. I want to do performance before I do exterior and interior.
I would spend some time looking through all the turbo build threads to see if going turbo is right for you. I would also consider the 4G64 swap. It won't give you much of a power increase after the swap, but it opens up a much larger selection of parts and options to make power from there.
The 4G64 engine swap will cost you about half of what a turbo will cost and you'll gain very little 10-15hp at most. But you've opened yourself to all the possibilities of the 4G6x engines - Evo head swap, Evo turbo setups, Evo stroker builds, etc. The market for the 4G9x engine is nowhere near as strong as the 4G6x market.
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I believe those that have done the 4G64 swap have had manual Lancers. If you're doing the swap you'd likely want to take the opportunity to switch to a manual transmission at the same time. You'd probably be the first to swap in an auto 4G64, unless someone can chime in to this effect?
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