I've got a slightly used EMS for sale. I had it on my 240 for a while, now I'm going with a different setup. Here is the info on it:

Plug-N-Play Engine Management System Part #: 30-1600
Retail:
$1,961.90

InfinitiG20 1991-1993

Nissan240SX 1989-1994

Altima 1993-1994 2.4L L4 B KA24DE

Altima 1993 2.4L L4 B KA24DE

NX 1991-1993

Sentra 1991-1994 1.6L L4 E GA16DE

Sentra 1991-1993 1.6L L4 P GA16DE



Plug & Play Engine Management Systems

AEM's Plug & Play Engine Management System (EMS) plugs directly into a vehicle's factory ECU harness and requires no additional wiring or hardware. Windows™ compatible software (2000, XP, NT, 98, 95, ME) makes the task of copying, viewing and manipulating data as simple as a click of the mouse. An integrated tuning wizard allows users to create a base map specifically for a car’s configuration, regardless of what type of injectors, sensors, coils or other changes have been made. The AEM EMS's infinitely adjustable software allows tuners to program virtually any combination of engine control, power adders and auxiliary devices, and accurately delivers proper amounts of fuel and correct ignition timing for any boost level or operating condition.