Classic Pontiac Trans Am Firebird Super Duty 455 sells for nearly $90,000 ... The top 10 best value used cars in 2025 Watch More ...

The Pontiac Firebird is one of the most well-known pony cars to come out of Detroit, but that sort of status usually comes with high prices. Is that true?

What do you think, is this 455 Firebird worth that kind of scratch? Or, is that price just the wrong Formula? You decide! Eau Claire, WI (Mmm, eclairs) Craigslist, or go here if the ad disappears.

There's a brutish elegance to this era of Firebird. An SD-455 was tested by Car and Driver in May 1973 and was declared, with a certain amount of sadness, "the last of the fast cars." ...

Trans Am Worldwide in Tallahassee, Fla., is picking up where Pontiac left off by creating all-new Firebird Trans Ams from the latest Chevy Camaro platform. It's newest model is an 1,100 hp street ...

The SD-455 engine finally reached production in June 1973. Availability was, however, limited to the Firebird model line only.

After the 455 engine was dropped for the 1977 model year, the most muscular Firebird offering was the 200-horsepower, Pontiac W72 400 cubic-inch V8 in the Trans Am.

After initially trying to sell Rick a 455 HO, the salesman reluctantly took his order for a brand new 1973 Firebird Super Duty 455. Rick piled on enough options to nearly double the price of the car.

So, we're looking at a 1969 Corvette C3 427 and a 1973 Pontiac Firebird Formula 455. This should be easy. Except it's not.

Finally, the teen hit pay dirt when he visited Key Pontiac in Elmhurst. Wisely, he brought his mother along this time, explaining why the dealership let him try out a rumbling Formula 455 Firebird.

In 1973 and 1974, Pontiac offered the Super Duty 455 engine (7.45L) in the Formula. The high-performance SD 455 delivered 310 hp for the first year but went down to 290 hp.

The 455 Firebird is a 16'6" long x 6'6" wide monster with more bonnet than bag room, but it easily makes up for this in visual appeal. "I just love the shape of it," says John.