 The first significantly different model was the "224", introduced in 1937 with a Canadian-built 224 in3 (3.7 L) version of the then-new .After 1940 the 239 in3 (3.9 L) Pontiac Flathead Six was used, but otherwise the cars shared chassis and body parts with the Chevrolets as a measure to reduce the cost of production for the relatively small Canadian market.After the Second World War the Pontiac brand continued to be very popular, and the product line was further harmonized with the Canadian Chevrolet products.