Bonneville became a separate model in 1958, available as a two-door hardtop or a convertible. It paced the Indianapolis 500 in its first year. As a separate model Bonneville had a significantly lower price tag of around $3,000 thanks to the demotion of most of the luxury items found on the 1957 Star Chief bodystyle from standard equipment to the option list. Also a 300 horsepower (220 kW) 370 cubic inches (6,100 cc) V8 with four-barrel carburetor and dual exhausts was now standard equipment. The fuel-injection system offered with the standard engine on the 1957 Star Chief bodystyle was now listed as an extra cost option but very few 1958 Bonnevilles were so equipped due to a towering option price tag of US$500, which was not considered a very good value considering that for US $93.50, a more reliable Tri-Power option was available with three Rochester two-barrel carburetors and similar power. The electric clock was standard.
For 1958, GM was promoting their fiftieth year of production, and introduced Anniversary models for each brand; Cadillac, Buick, Oldsmobile, Pontiac, and Chevrolet. The 1958 models shared a common appearance on the top models for each brand; Cadillac Eldorado Seville, Buick Roadmaster Riviera, Oldsmobile Holiday 88, Pontiac Bonneville Catalina, and the all-new Chevrolet Bel-Air Impala.
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Please watch: "1958 Buick Limited Riviera Coupe (Turqoise) 364cu Nailhead V8, Fully Equipped + Air suspension"
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