that reduce inertia of the rotating assembly, complementing the quick-spooling turbochargers Peak boost increased to , from Higher-flow fuel injectors Oil pan baffling for better oil flow at high cornering speeds Applications: LFR The LFR is a bi-fuel variant of the LFX, although multi-point fuel injection is used for both the gasoline and CNG instead of direct-injection. Applications: LFY The LFY is similar to the LFX, but adds stop-start technology and has improved airflow. Applications: Fourth generation Starting with 2016 Cadillac models a new generation of High Feature V6s were developed. These new engines have redesigned block architectures with bore centers increased from on prior HFV6 engines to and a redesigned cooling system to target the hottest areas while also facilitating faster warm-up. They also incorporate engine start-stop technology, cylinder-deactivation, 2-stage oil pumps, and updated variable valve timing featuring intermediate park technology for late-intake valve closure. Both engines debuted in the 2016 Cadillac CT6. 3.0 L LGW Bore and stroke of are used, along with a 9.8:1 compression ratio and twin turbos with titanium-aluminide turbine wheels. Maximum engine speed is 6500 RPM. Premium unleaded fuel is required. Applications: LGY Bore and stroke of are used, along with a 9.8:1 compression ratio and twin turbos with titanium-aluminide turbine wheels. Maximum engine speed is 6500 RPM. Premium unleaded fuel is required. Applications: 3.6 L LGX Along with the increased bore spacing, the new 3.6 L DI V6 has larger bores than before, growing from to with the same stroke as the 3.0L LGW, for a displacement of . Intake and exhaust valves are also increased in size along with other changes to the cylinder head. Compression ratio is 11.5:1 and maximum engine speed is 7200 RPM. Applications: LGZ The LGZ is a variant of the LGX designed for pickup truck use. Applications: V12 On March 21, 2007 AutoWeek reported that GM was planning to develop a 60-degree V12 based on this engine family to power the top version of Cadillac's upcoming flagship sedan. This Cadillac would essentially have had two 3.6 L High Feature V6s attached crankshaft-to-crankshaft and would have featured high-end technologies including direct injection and cylinder deactivation. If this engine would have been developed, it would have displaced 7.2 liters, and produced approximately and of torque. Development of the engine was reportedly being conducted in Australia by Holden. In August, 2008, GM announced that development of the V12 had been