The improved variant of Challenger 300 first flew on March 2, 2013, was unveiled at the next May EBACE and was due to enter service in May 2014. Hot-section modifications and a FADEC push gave the Honeywell HTF7350 7.3% more takeoff thrust at 32.57 kN with the same flat rating, durability and reliability; coupled with a strengthened wing with canted winglets and more span allows for 410 kg more full fuel payload.
It received its type certification from Transport Canada on June 11, 2014, from the FAA on June 25 and from the EASA on September 2. Canted winglets have a less acute angle that reduces transonic drag and enlarge the span by 1.6 m, increasing wing area and aspect ratio. At a weight of 13,700 kg it cruises at 843 km/h TAS and is advertised as burning 696 kg per hour.
It is able to carry eight passengers over a 5,926 km range at a 849 km/h long-range cruise.