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1974 Pontiac Firebird Formula. Curb weights rose dramatically in the 1974 model year because of the implementation of 5 mph (8.0 km/h) telescoping bumpers and various other crash- and safety-related structural enhancements; SD455 Trans Ams weighed in at 3,850 lb (1,746 kg) in their first year of production (1974 model year; actually 1973).
1974 Pontiac Firebird Formula. Curb weights rose dramatically in the 1974 model year because of the implementation of 5 mph (8.0 km/h) telescoping bumpers and various other crash- and safety-related structural enhancements; SD455 Trans Ams weighed in at 3,850 lb (1,746 kg) in their first year of production (1974 model year; actually 1973).
This incredibly rare muscle car is an incredibly desirable Pontiac with a powertrain to match.
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.
One holdout to this industry-wide slide was the Super Duty 455 engine of 1973–1974. Available only in the Firebird Formula and Trans Am models, this was rated at 310 hp (230 kW) net initially but after having issues passing EPA emissions tests, the camshaft was changed to the old RA III cam, and with the change, came a 290 hp (220 kW) net rating.
Pontiac Firebird Formula (1987-1992) Pontiac Firebird Trans Am (1987-1992) Pontiac Grand Prix Coupe (1987-1996) Pontiac Safari (1987-1991) Pontiac Tempest (1987-1991) (Canada Only) Renault Medallion (1987) Shelby Charger (1987) Shelby CSX (1987-1989) Shelby Lancer (1987–1989) Stutz Bearcat II (1987-1995) Subaru Justy (1987-1994)
Pontiac Banshee (1966, 1969, 1974, 1979, 1989) Pontiac Bonneville Special (1954) Pontiac Bonneville Sport Convertible F/I 4 bucket seat cnvt (1958) Pontiac Bonneville X-400 (1959–1960) Pontiac Bonneville Le Grande Conchiche (1966) Pontiac Bonneville G/XP (2002) Pontiac Cirrus (1966) Pontiac Club de Mer (1956) Pontiac Fiero Convertible (1984)
New for this year were Firebird-inspired front bumpers, wrap-around taillights, and crease-style body lines. Replacing the Pontiac-built OHC six-cylinder as the base engine for Tempest, LeMans, and LeMans Sport was Chevrolet's 250 cubic-inch straight-six engine. V8 offerings included 350 and 400-cid options with 2-barrel carburation and a 330 ...
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