In November 1961, Knudsen had moved to Chevrolet. Pete Estes now became general manager of Pontiac and Delorean was promoted to Pontiac chief engineer. Both continued Knudsen's work of making Pontiac a performance-car brand. Pontiac capitalized on the emerging trend toward sportier bucket-seat coupes in 1962 by introducing the Grand Prix, taking the place of the Ventura, which now became a trim option on the Catalina. Although GM officially ended factory support for all racing activities across all of its brands in January 1963, Pontiac continued to target performance enthusiasts by making larger engines with more power available across all model lines. For 1963, the Grand Prix received the same styling changes as other full-sized Pontiacs such as vertical headlights and crisper body lines, but also received its own squared-off roofline with a concave rear window, along with less chrome. This concave rear window was duplicated on all Tempest/LeMans four-door intermediates in 1964-1965.