Buick updated its Special model in 1954 with the new GM B-body by Fisher that was shared with the Oldsmobile 88. In 1951 Buick had replaced its long-serving 4.1-litre eight with a new 4.3-litre 'Fireball' straight-8, but this gave way to the new 4.3-litre 'Nailhead' V8 for 1954. Oldsmobile shared its body with Buick, including the glass, but there were many brand differences. Buick also introduced the Century in 1954 using the same Special body but with a 5-litre V8 engine. Riviera models were 4-door hardtop versions of the Special and Century, and there Oldsmobile Holiday versions for the 88 and 99 in 1955. In 1949 Buick started adding 'ventiport' decorations to the front wings and the 1954-57 Specials and Century carried 3 of these (larger Buicks sometimes had 4). For 1957 the GM B-body cars were given a new body but on the same 122-inch wheelbase.