[jaje]

the 1st one is just to upgrade to mpfi from dpfi (dx)...this is for non vtec engines (but easy to just add the 4 vtec activation wires)

the 2nd one adds vtec wires and converts to mpfi from dpfi (dx)

the b18a is non vtec so you only need the $199 one...you can do the wiring yourself but it's a pain in the butt

http://hybrid2.honda-perf.org/tech/4gdxtozc.html

http://hybrid2.honda-perf.org/tech/4gtech.html