Perhaps one of the most important model years ever for Pontiac was 1955, the year that the brand lost its stodgy, roly-poly image and gained V8 engines across the entire model range. The 1955 V8 replaced the old inline-six and straight-eight engines that had served Pontiac for many years. What the '55 Bel Air did for Chevy, the '55 Chieftain and Star Chief did for Pontiac. The '55 was one of the last "Silver Streak" Pontiacs, the bright trim pieces that ran over the hood and down the sides of the little tail fins. Silver Streak had long been a trademark of Pontiac, and had become something of a symbol of the "old" Pontiac. After 1956, Pontiac was reworked into a sporty brand that would be heavily marketed as such right up until its final years.