restyle, (also applied to the Hawk Saloon and the Rootes Group's smaller Hillman Super Minx and its derivatives) with a flat roofline and rear window, six-light side windows and a larger, taller windscreen. The Estate body in both marques remained unchanged. Twin Zenith Stromberg 175CD carburettors were fitted along with a Harry Weslake tuned cylinder head, increasing the power to , and synchromesh was fitted to all ratios in the gearbox—on the previous versions it had only been on the upper two. Major modifications were made to front and rear suspensions and they required less maintenance. Sound insulation was further improved. Hydrosteer power steering was available as an optional extra, as was an automatic transmission (Borg Warner Type 35 on Series Va), and metallic paint finishes. The motoring correspondent of the Motoring and Driving Register wrote: "The Humber Super Snipe is an assured car for travelling comfortably from town to town and even on the new fast motorways. Yet its powerful engine allows it to handle the challenges of smaller lanes where the speeds rise and fall with each change of direction and each corner negotiated." Humber Imperial Intended to match BMC's Rolls-Royce engined Vanden Plas Princess 4-litre R the Imperial shared the basic specification and performance of the Super Snipe with the addition of a vinyl roof, fully reclining front seats, automatic transmission and hydrosteer power steering as standard. However, a manual 3-speed transmission could be ordered. The car also featured electrically adjustable rear shock absorber settings, a separately controlled rear passenger heater and optional West-of-England cloth-trimmed seats as well as many smaller amenities such as individual reading lamps. The Rootes Group ceased production of the Series Va version in July 1967, by which time the group was under the control of the American Chrysler Corporation. The last of the big Humbers were assembled by Chrysler in Melbourne, Australia. Plans to introduce a V8 engine, and for the Chrysler 180/2L to be marketed as a Humber in the UK did not materialise, although a small number of Chrysler LA engine (318ci) powered prototypes were built. Export markets and foreign assembly While the post-World War II home market for the car continued as before, the Rootes Group also marketed the car for export. The Super Snipe was assembled in Australia, commencing in 1953 with the Mark IV. From 1956 the car was available with automatic transmission, but the model was