E30 325i Tune Switching Device (Not Miller W.A.R. Chip)

[saturnv3]

what is it? and where do i get it?

[OldSkoolEX]

@saturnv3 dont think anyone makes something like this that can be bought off the shelf. it uses a chip thats 2x the capacity of a standard chip allowing 2 files to be burned to the chip and the switch is to ground one of the pins to switch between the low half and high half of the chip as each half has a different tune.. or the same tune with the launch control tweak on one.