Cadillac recently announced the launch of a new twin-turbocharged V6 engine that is, to all intents and purposes, one of the best powertrain in GM’s history. We have told you about this engine’s excellent power and efficiency before. Now Caddy has released more technical details, specifically about the clever anti-lag system they have employed in this motor.

Having two big and meaty turbochargers is great for power, but they do tend to take their time to spool up and make that power. It’s physics. Turbos work with the pressure of exhaust gas, and it takes time to build up.

Some engine makers like BMW are using three turbochargers these days; a small, fast-spooling one for low rpms, and then two big ones for high rpm. Cadillac, however, has gone for a unique combination of smaller turbochargers, top-mounted throttle body and shorter air pathways.

This engine has a special, patented air flow design that makes the most of engine packaging efficiency to improve torque response time over other air flow designs. Reducing flow restriction at peak power results in fast torque production, compensating for that turbo lag. Then we have the cleverly-sized turbochargers, relative to the size of the engine, which make the process quicker. An integrated charge air cooling system also contributes because the compressors blow through very short pipes up to the intercooler.

Those parts work tirelessly to let you enjoy a seamless stream of 420 horsepower (313kw) and 430 lb-ft of torque (583 Nm). The new engine will debut in the 2014 CTS Vsport midsize luxury sedan and XTS Vsport this fall.