Hardin marine just released this thing at the Miami International boat show, which is kind of like the Detroit auto show equivalent. I haven't done much digging other than some basic info about it and what i've run across being posted. From my own sleuthing it appears to be of LSX origins. Oval shape valve covers with center bolts, coil mount locations, round and evenly spaced header ports with centered bolt holes.
http://www.xvipower.com/technical-s...00000000000000000000000000058a9a8720091cfa10f
900-1400hp N/A 1400-2000HP supercharged or turbo. PUMP GAS 91 octane
https://speedonthewater.com/new-boa...wer-introduces-v-16-ls-marine-engine-in-miami
and this article confirms it.
https://www.facebook.com/PowerboatNation/videos/1442793372417590/
http://www.xvipower.com/technical-s...00000000000000000000000000058a9a8720091cfa10f
900-1400hp N/A 1400-2000HP supercharged or turbo. PUMP GAS 91 octane
https://speedonthewater.com/new-boa...wer-introduces-v-16-ls-marine-engine-in-miami
and this article confirms it.
https://www.facebook.com/PowerboatNation/videos/1442793372417590/