Pretty much the same recipe for any one of the 4G63T powered cars in the Mitsubishi line up. Exhaust, intake, FMIC (your car obviously have one)
Fit an EVO 5+ ECU and get it flash tuned after you install a walbro fuel pump.
KYB suspension can be sourced from www.nengun.com or www.greenline.jp
They should be able to hook you up with springs too. I know RSR did good springs for the earlier model RVR's, but were expensive.