2 step install

[90GSXDan]

Can it be installed without an msd ignition box, or do you need the whole setup.

 

[DSM90AWD]

Can it be installed without an msd ignition box, or do you need the whole setup.

From here

The 2-Step must be used with a compatible MSD Ignition Box, MSD Soft Touch Rev Control or a Timing Controller with a high speed retard module. No RPM or retard modules are supplied with the unit.

Your mod list says you have a stg3 EPROM, don't you have that feature already (e.g. Selectable Studderlaunch + NLTS + RevLimiter)