1973 Pontiac TRANS AM
1973 PONTIAC TRANS AM 455 SD
Introduced for 1973 and lasting only two model years would be the Super Duty 455 available on the Legendary Trans Am. In 1973 only 252 units would be produced including 180 automatics and 72 4 speed cars. Very under rated at 290hp, the SDs were producing performance numbers that everyone was more accustomed to seeing in 1969 and 1970. The SD-455 has been accurately described as Pontiac's last stand and the last real muscle car. The SD-455 was a thinly disguised race engine: four-bolt mains, reinforced block, forged pistons, forged connecting rods, nitrided crankshaft, even a provision in the block for a dry sump oiling system. The SD-455's cylinder heads were a free-breathing design patterned after the howling Ram Air IV heads, and the cam was similar to the grind used in the Ram Air IV. In 1973, the SD 455 ran the quarter mile in 13.751 seconds and at a terminal speed of 103.56 mph. That was fast. That is outrageously fast and it was done in a street legal car a 1973 street legal car with a full tank of gas (3854 lb. curb weight), street tires and, wait for it . . . automatic transmission. Engine: 7.5L V-8, 290-310 hp, 390-395 lb-ft Transmission: 3-speed automatic Suspension, Front: Control arms, coil springs Suspension, rear: Live axle, leaf springs Brakes, F/R: Discs/drums Weight: 3600 lb Years produced: 1973-1974 Number produced: 1296 Original price: $4289/$4929 (Formula/Trans Am, 1974) Value today: This 1973 model is at least 50 percent more valuable than face-lifted '74s. These cars are highly collectable and desirable and sought after. Here is a very nice example of an original car you won't find many other places!
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