1973 Pontiac Firebird Trans Am SUPERDUTY

Real deal numbers match 455 SD !


Year 1973
Make Pontiac
Model Firebird Trans Am SUPERDUTY
Engine and transmission
Engine Type
Engine Size
Estimated HP
Transmission Type
Transmission Spec
Exhaust Type
Muffler Type
Interior Color
Seating Type
Seat Material
Shifter Type
Restoration Status
Awards Summary Show winner !
Body Style
Body Color
Paint type
Front Suspension Type
Rear Suspension Type
Axle Specification
Front Brakes
Rear Brakes
Miscellaneous The car comes completely inspected and detailed by PTTM. The car comes with PHS and history documents
Bodywork & Trim




General discription


This extremely rare 1973 Pontiac Firebird Trans Am 455 SUPERDUTY. Its one of only 180 ever produced Super duty's with automatic transmission and a possible one of one car in this color combination and with these options ever build. The car is in the Superduty registry and its the only one with these combinations in the world today. On top of that this car is also completely in original condition and it still carries its complete numbers matching SD engine and transmission. It's also a true real low mileage car with only 31000 miles ever driven. The car is also equipped with almost every available factory extra cost option. 

The 455 Superduty Transams were the last and fastest muscle car's that were ever produced in the early 70's. The Superduty engine was developed by Pontiac as a pure race engine and it found its way into street production cars in 1973. The Super duty engine is a completely different engine than the 455 and 455HO engines that Pontiac had produced earlier on and although it maybe came to late to compete in a dying muscle-car market because of the upcoming fuel crises and ever more restricted environmental rules of that era, but man what a monster had the produced. 

The short block was a complete new design with 4 bolt main caps and many other special provisions to be able to make it strong and ready for some serious street or strip racing programs, but at the same time the head design was new as well as the intake, oil system, and exhaust manifolds were upgraded. In the first test phase, it made close to 600hp !. But seeing the engine was also designed for use in street cars Pontiac engineers had to make compromises to make that happen. The compression ratio was lowered and at the last minute, a bit milder camshaft was used to meet the required rules that were already very strict in 1973 and which had killed all other brands' true performance engines. But even then the engine was a monster and performed very well indeed. To get these cars also sold, 
Pontiac had to heavily underrate the factory HP rating in the sale's brochures to 310 hp and a mere 395 ft.lbs ( 535 NM ) because otherwise, owners couldn't get these car's insured anymore in 1973. However, once on the street's these Superduty equipped cars had way more power than that and were estimated to have close to 400+hp or more and 550-600ft.lbs ( 750+NM). 

The proof of that was given by a dragrace, performed by an independent journalist from Hot rod magazine in 1973 where he took a completely stock, Automatic transmission equipped Superduty to a staggering 13,54 seconds down the quarter-mile with a 1/4 mile trap speed of 105 mph... on street tires !.  A record that wasn't broken until in 1993 by the Corvette ZR1 more than 20! years later.... The Corvette ZR1 produced close to 500hp so its needless to say that Pontiac's Superduty's were absolutely very underrated by the factory back in 1973. 

Some muscle cars specialist dare to state that the Pontiac 455SD engine was the absolute best performance engine ever designed in the late 60's and early 70's and onwards and it would outrun any street 426 Hemi from Chrysler, any Chevy's 427 ZL1 engine, or no matter what other Street based V8 engine design that was built at that time. 

It's needless to say that this Superduty therefor is not only a very rare car but also might well be the fastest classic muscle car ever produced. The fact that there where only so little build and sold was due to the fact that these engines were a very expensive option to ad on the already expensive price tag of a base 455 Trans am combined with the fact that the fuel crisis and insurance cost were a huge obstruction for most buyers at the time also. Pontiac was also held back with the production of these great engines because the emission rules that were changed almost daily and Pontiac engineers had a big job fighting against that. This meant that the Superduty engine options came available very late in the production year, which also was cause for the small production numbers. 

The car we present to you here is one of those very rare and highly desirable and collectible Superduty's. The car spend almost its entire life in the dry states of Texas and Missouri and was well taken care of and pampered by its 2 original owners and never raced or abused in any way, hence the fact it's still equipped with its original driveline today. As many of the original Superduty cars were used for drag and street racing with tuned up engines which also meant many of these cars were crashed and engines wrecked. Not this car.

Its painted in the factory original Cameo white color with black deluxe bucket seat interior that is one of the best colors for the Trans am's sleek and modern design. Its equipped with many desirable options as you can see below and its condition is fantastic. The car is completely damaged and rust free inside and out and the engine and complete driveline is in as new condition as well. At some point in its live, the car received a mild restoration and every detail, the complete brake and suspension and steering system was rebuild with factory original components that make's the car appear factory new until today.

If you ever 
want to own one of the true legend's and one of the most beautiful and best driving and fastest classic muscle car ever designed, then this is it !. With it being a true One of One car in its options and condition, and with only around maybe 100 of these cars in existence today worldwide you can be sure that you will be the owner of something truly exclusive. When was the last time you came across one of these rare cars? big change that answer is never...Its in our showroom soon and we would be more than happy to invite you to come and see it with your own eyes and we can tell you every detail about it. The car also comes with full PHS documentation to back up its original history and pedigree. 


  • SD 455 Engine
  • Automatic TH400 trans
  • Power steering
  • Airconditioning!
  • Power brakes
  • Front disc brakes
  • Lim.slip differential and 3,08 gears
  • Rear window defogger!
  • Power windows!
  • Tilt steering wheel
  • Fm stereo radio
  • 8 Track player
  • Custom interior package!
  • Door edge guards
  • Tinted windows!
  • Front console
  • Light package
  • Rally wheels **
  • And more

    ** The car comes with its original wheel's AND a set of custom alu 17 inch honeycomb wheels ! on request ( see pictures ). 

MORE INFO, PRICE, AND PICTURES AND A WALK AROUND VIDEO FOLLOW SOON! But if you like additional information ahead then please contact our sales !. 

If there are details on the car you want to change or add some personal details, we can assist you with that no problem!

* The car comes with US title and EU import taxes paid and included.

* On request we can also sell the car with Dutch plates or assist with TUV (H)

* All our cars are sold with complete service and inspection prior to delivery.

* On request we can transport the car door to door worldwide!

And keep in mind that, the car you're looking at here today, was also looked at
by others yesterday. And we can only sell it once!


Price in euros
€: Coming soon / Expected

Price includes all cost

Contact us for more information

  • Guide: Matching numbers

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