It looks like this and is from Z1 motorsports but, Where is says Z1 ECU Upgrade it instead says: AshSPEC Stage 3 + ECU Upgrade. The rest is the same with N/a, Dual, 5speed, Federal, and 270 Circled. Any clue?
Follow Ups
I found an ecu unit beneath the passenger floor board - n/a300zxdrvr19:15:08 04/06/07