Does the factory radio in the 03 have rca outputs in the back? Id figure id ask before I pull it out and look because im trying to install an infinity basslink. Thanks

No...98% of factory radios do not have that

You can always add them.

What do you think would be the best way to add them? Line out converters? I know most cars dont have rca outputs, but when I spent 32k$ I think in the back of my mind it might.

the factory evo radios dont have rcas, i have 2 sitting at my house. the only so-so way to add rca's to your stock radio would be to add that line out converter. you are going to loose some quality by doing this though. if you figure that you dont have any rcas, so your going to create a set using your existing speaker wire. id say save your money and get an aftermarket headunit that has a set. removing the radio is easy, i did my deck in about 15 mins, it took me so long because i was eating chinese while wiring the harness, thats just how easy it is. all you have to do is pull off all the knobs, there are 2 screws behind the left and right knob (use a phillips). the black surround should just pop off, then you will also need an 8mm(i believe) socket to pull the mounting from the car. remove the 2 brackets on either side of the factory radio and put it to your aftermarket headunit. its easy from there, you should be able to figure it out. also note that mitsu's do not have grounds on their harnesses so take the ground wire and "ground" it. good luck with your radio, its a quick fix and it sounds better with a new one in anyways.

I got a CD-Changer for sale it has RCA outputs

Nope, 99.9% of factory decks dont have em. Lets not kid ourselves too much, 60K Merdcedes dont come with them either. Dollar value has nothing to do with it.

just go out and get a new cd player...trust me it'll be worth. the stock h/u has CRAP sound processing as well as no RCA outputs