the long-running three-bar design used on Ford trucks to the two-bar design that debuted on the 2017 Super Duty model line. The powertrain underwent several revisions, as the 3.5 L V6 was replaced by a 3.3 L V6 mated to a six-speed transmission. The 2.7 L EcoBoost V6 engine and 5.0 L V8 engines were fitted with a 10-speed automatic (from the Raptor) and stop-start capability (previously only from the 2.7 L EcoBoost). In 2018, a PowerStroke diesel engine was fitted to the F-150 for the first time, as Ford introduced a 250 hp 440 lb-ft of torque 3.0 L turbocharged V6 (from the "Lion" lineup of engines shared by PSA Peugeot Citroën and Jaguar Land Rover). Safety and driver-assistance features improved and added for the 2018 model year include Pre-Collision Assist with Pedestrian Detection and Adaptive Cruise Control with Stop and Go. The SuperCrew Cab version of the 2018 F-150 reclaimed an IIHS Top Safety Pick rating. Fourteenth generation (2021–present) The 14th-generation Ford F-Series was introduced for the 2021 model year through a live presentation streamed over the Internet on June 25, 2020. Despite sharing a strong visual resemblance to the 13th generation, the 2021 F-150 underwent a redesign of 92% of its parts, carrying over only its cab and pickup box structure. The powertrain line is largely carried over from the previous generation, with a 3.3-liter V6, 2.7-liter and 3.5-liter EcoBoost twin-turbo V6s, a 5.0-liter V8, and a 3.0-liter diesel V6. Dubbed PowerBoost, an optional gasoline-electric hybrid powertrain was introduced for the first time in a Ford light truck, pairing an electric motor with the 3.5-liter V6. The six-speed automatic is dropped, with all engines paired to a 10-speed automatic. The 5.0-liter V8 receives a new cylinder deactivation system, called Variable Displacement Engine technology, similar to GM's Active Fuel Management and Chrysler's Multi-Displacement System. Along with exterior design changes to enhance aerodynamics, many changes were made to the interior, adding fold-flat front seats and larger touchscreens (including a digital instrument panel); as an option, Active Drive Assist was offered as a driver-assistance system. A new F-150 Raptor was announced in January 2021, and features a 3.5-liter V6 gasoline engine. A fully electric version of the F-150 was unveiled on May 19, 2021: the Ford F-150 Lightning. Special models Throughout its production, variants of the Ford F-Series has been produced to attract buyers. While these variants primarily consist of