The Thunderbird was revised for 1957 with a reshaped front bumper, a larger grille and tailfins, and larger tail lamps. The instrument panel was heavily re-styled with round gauges in a single pod, and the rear of the car was lengthened, allowing the spare tire to be positioned back in the trunk. The 312 cu in (5.1 L) V8 became the Thunderbird’s standard engine, and now produced 245 horsepower (183 kW). Other, even more powerful versions of the 312 cu in (5.1 L) V8 were available including one with two four-barrel Holley carburetors and another with a Paxton supercharger delivering 300 horsepower (220 kW). Though Ford was pleased to see sales of the Thunderbird rise to a record-breaking 21,380 units for 1957, company executives felt the car could do even better, leading to a substantial redesign of the car for 1958.