I don't currently sell any chips for 160's.
The new low-z SMP 160's run similar to their 120's, not quite as nice but similar. Definitely better than the old Bosch 160's from what I found. I'll need to do longer term testing before a chip would be available, but I think the XFI would handle them fine.
The Bosch hi-z 160's I tried to run, but they were a little too touchy with temperature on the Buick. They might work better on other cars.
Regards,
Eric