Total cost of my DSM 450 setup? $58.62.

What you need?
-DSM 450s off of a DSM Turbo 5SPD (must be stick)
-Resistor box from older Prelude/CRX/Accord, etc, or 4 10ohm, 10watt resistors from Radio shack (come in a pkg of 2 for 1.69 ea).
-DSM Injector Clips (if youre obd2)

Its cake. There are two wires coming from each injector, a colored wire and a yellow/black. Just solder in a resistor in between the yellow/black wire of each injector, and youre done. If youre OBD1, just snip off the nipple in the Honda injector clip (a la 9005 conversion) and plug n play, no other clip needed. Otherwise, you can just snip the Honda clips off and solder on the DSM clips.

RC Cost? $300+
DSM Injectors? $50. Cleaned/Balanced/BP'd? $25.

My only gripe is they are loud as hell. They tick like....a really loud injector