Thanks! Additional info is you can remove fuse #35 right in the left side trunk fuse box listed as the "Exhaust valve fuse" in the owners manual, and in my 16' ATS-V listed as "spare" on the fuse box lid. This will leave the valves open in all driving modes and all speeds...no dash lights or warnings. Now I have to see if it works in My 16' ZO-6.
Eric