You need resistor packs, OBD1 connector clips, and something to SERIOUSLY control fuel... those injectors flow nearly 2x what stock injectors do, and you will have a ***** of a time if you try to drive with them on a stock ECU. I had to struggle home on stock ECU with DSM 450s when I was having trouble with my standalone and it wasn't pretty - had to keep the idle at 3000 rpm and getting on the freeway was a joke.