ROM dump (8.1 Apr) from a Google Pixel engineering sample. Could help with secure boot development as the phone was reporting 'Secure Boot: Development' rather than 'Secure Boot: Production'.
Images for the following partitions are inside the archive: aboot, boot, rpm, system, tz, xbl.
See:
https://www.reddit.com/r/GooglePixel/comments/89zba3/be_careful_when_buying_pixels_from_ebay_i_ended/