its actually a 40hp difference and intake and exhaust wont make it faster than a Type S (unless the guy in the Type S doesnt know how to drive at all).
gotta remember that the Type S also has a shorter gear ratio because of the 6 speed transmission and "real" VTEC compared to the economy version of the K20A3 in the base RSX.
intake, race header, exhaust, motor mount inserts and definitely hondata k-pro will give you excellent gains and keep up with a Type S, possibly making a bit faster.