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After the 1974 SD455 was dropped the 1975 Firebird's top performance engine was an 'L78' Pontiac 400 cu in (6.6 L). Pontiac still offered the regular 455 (RPO L75) in its full sized cars, and after a negative public reaction for dropping the 455 engine, it was re-introduced mid-year as an available option for the 1975 Pontiac Trans Am.
Originally, the L75 455 7.5L V8 was dropped entirely, but it returned mid-year, available only with a four-speed Borg Warner Super T-10, and it was no longer available for the Formula. Although it was brought back as the "455 HO", it was not the same engine as the 1971-72 LS2 455 HO seen in the earlier Firebirds.
Engine selection saw the addition of Pontiac’s largest V8, the 455, available in the L75 325 hp (242 kW) version and the LS5 335 hp (250 kW) HO version. Both the 455 and 455 HO were available as engine options for the Firebird Formula, but the Trans Am received the 455 HO as standard equipment. [23]
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No four-speed manual transmission cars were produced. Performance tests from 1977 estimated 0-60 mph (97 km/h) time for the Can Am with the Pontiac engine at about 10 seconds, about the same as the previous year's Le Mans with the 455, and a 1 ⁄ 4-mile (0.40 km) time of approximately 17 seconds. It is estimated that 1133 Can Ams were produced ...
Among other things, this version of the engine was equipped with a high-performance racing camshaft and dual 4-barrel carburetors. This was the first in a series of NASCAR -ready pre- Super-Duty V8 engines and introduced the long line of multi-carburetor-equipped engines that saw Pontiac become a major player during the muscle car and pony car ...
The base front-wheel-drive Polestar 2 has been dropped entirely for 2024.
The third generation Pontiac Firebird was introduced in late 1981 by Pontiac alongside its corporate cousin, the Chevrolet Camaro for the 1982 model year. These were also the first Firebirds with factory fuel injection, four-speed automatic transmissions, five-speed manual transmissions, four-cylinder engines, 16-inch wheels, and hatchback bodies.