Had a bad day today.
Then I came home and found this.
Opened it up gave it a clean. It's an ls6 intake from a later model holden ls1.
The only real visual difference between this and the older ls1 intakes is the plenum floor which is flat- increasing plenum volume and, somehow, port flow rates.
This has arrived too- it's the PCM I'll try make use of. I have been constantly undecided which way to go- aftermarket or stock Delphi- but this unit came up for an unusually good price so had to grab it.
Earlier in the week I made some brackets for my heater, and next update will show where it is to be mounted and plumbing.