ever heard of the Cadillac Blackwing engine? I haven't heard about it for years... so, this is a good info post to tell you about it, or remind you of it (huh, a rare engine info post!)

the Blackwing V8 was ready for production by the end of 2018. At first, only 275 2019 CT6 sedans were to be sold in the United States with the Blackwing V8. Within minutes of the order books opening, all 275 units were sold.

The Blackwing's turbos could achieve 20 PSI of boost, or about 10–15 PSI more than a standard, turbocharged engine seen in mass-market vehicles.

All Blackwing V8s were mated to a GM 10L90 10-speed automatic transmission, and all CT6s with the Blackwing motor equipped received Cadillac's all-wheel drive system. 

The Platinum 4.2 Blackwing produced 500 horses, and the CT6-V received 50 more thanks to tweaks in the CT6-V's ECU.

Despite its cancelation, you can still order a Blackwing V8 long block off of Cadillac's parts website, so long as you have $14,587.26 to spend on it.

In total, about 1,200 CT6 4.2 Platinums and CT6-Vs were sold with the Blackwing V8 before the proverbial plug was pulled. Due to the aforementioned cost each LTA V8's production incurred, General Motors lost roughly $23 million on the entire Blackwing V8 program.

https://carbuzz.com/cadillac-blackwing-v8-engine-production/