[Mountain]

Well, it's an LT4. Sounds like they "cleaned up" some things inside the engine and retuned it. I see no reason GM wouldn't copy this into the Camaro ZL1, given the current 6th Gen may stay around a bit longer.

EDIT: Some excerpts from various articles on the new LT4:

Originally Posted by Autoblog

But thanks to intake and exhaust improvements, output is up to 668 horsepower and 659 pound-feet of torque, as opposed to the CTS-V's 640 horses and 630 pound-feet. The engine also is handbuilt in Bowling Green, Ky., just like the short-lived turbocharged DOHC Blackwing V8.

I forget, but aren't the Z/06 and ZL1 LT4's hand-built in BG, too?

Originally Posted by Road&Track

The CT5-V Blackwing gets GM's LT4 6.2-liter supercharged V-8, updated with a new 1.7-liter Eaton supercharger, titanium intake valves, and a new intake system. All that finessing adds up to 668 hp and 659 lb-ft of torque, increases of 28 and 29, respectively, over the old CTS-V.

+18hp/+9lb-ft over the ZL1

Originally Posted by AutoWeek

No, instead Cadillac stuffed a supercharged 6.2-liter V8 derived from the LT4 that powered the CTS-V. While Cadillac could have just stuffed the older LT4 V8 into the new car and made people happy, the company instead opted to revise the LT4 to help it make more power. Engineers fit a new supercharger, throttle body and exhaust system and revised the tuning to help this pushrod V8 make 668 hp and 659 lb-ft of torque.

LT5 TB?

Originally Posted by MotorTrend

he Blackwing's big, forced-inducted V-8's extra power—28 additional horses and 29 more lb-ft of torque compared to the LT4 in the third generation CTS-V, the car the CT5-V Blackwing mostly replaces—comes primarily from a combination of a new 1.7-liter Eaton supercharger, 46 percent more airflow into the intake plenums, new throttle bodies, and a new exhaust system. There's also a revised oil pan and oiling strategy that Cadillac developed after a 24-hour continuous track test in the automatic CT5-V Blackwing, and a half as long 12-hour continuous test of the manual version.

I wonder how it compares to the Camaro version, because the wet-sump for the LT1 and LT4 in the Camaro had similar work.

The carbon-ceramic brakes aren't a big surprise: there were one or two ZL1 mules spotted, back in something like 2018 or 2019, that had carbon-ceramic brakes on them. The Z/28 carbon-ceramic rotors will swap into the 6th Gen Camaro hats...