• A member of the Edition 55 series of vehicles built to celebrate 55 years of AMG
• Limited to five units at approximately $620,000
• Accompanied by IWC Pilot's Watch Chronograph Edition 55 in limited-edition box

Mercedes-AMG has introduced the latest Edition 55 model to celebrate 55 years since AMG was founded. But instead of being based on a roadgoing car, the new special edition is a race car, specifically the AMG GT3.

Mercedes-AMG has already introduced several Edition 55 models to mark the occasion. Celebrations kicked off with the G63 Edition 55, and thus far, we've seen Edition 55 versions of the A35, CLA35, CLA45, and the GLE. The ultimate celebration of the occasion (unofficially) is, obviously, the Mercedes-AMG One. But that won't be coming to the USA, which means this AMG GT3 is arguably the best we can hope for.

Thankfully, it's also an exciting track toy with an interesting powertrain, which makes it quite a bit more special than all the other limited-edition models we've seen so far, which have frankly been boring. It's also the most expensive, retailing for the equivalent of $620,000.

Only five Mercedes-AMG GT3 Edition 55s will be made, which automatically makes it the most exclusive celebratory model yet. To ensure the rarity of this particular model, Mercedes-AMG created a specific range of chassis numbers for the five units.

The most significant difference can be found under the hood. The Edition 55 is not FIA homologated, so Mercedes-AMG was free to add more horsepower. What's even cooler is that this car doesn't have the 4.0-liter twin-turbo V8 found in the road-going model. Instead, the GT3 Edition 55 has a 6.2-liter naturally aspirated V8 (6,208 cc, to be precise, which AMG calls a 6.3-liter), which now produces 641 horsepower - up 100 on the FIA-homologated version. However, if you intend to go racing, you can order it in FIA-approved spec.

This is the first Edition 55 model to boast a power increase instead of just exterior and interior trinkets.

Because it doesn't have to follow any guidelines, it also has a performance exhaust system made from Inconel. To improve the bark, AMG removed the silencer.

The car's exterior is finished in Manufaktur Alpine Grey Uni with red accents. It works beautifully with the front diffuser, rear diffuser, rear wing, flicks, louver, radiator grille, and side skirts; all finished in matte effect carbon fiber. The Affalterbach crest is painted on the doors, and the 55th-anniversary logo can be found on the rear wing.

On the inside, it gains seat embroidery featuring the anniversary logo and a plaque with "Edition 55 - 1 of 5" carved into it.

The Data Display Unit from the standard GT3 has been carried over. In addition to displaying speed, engine speed, operating temperatures, lap times, gear, and shift indication, it shows the 55th-anniversary logo when the car is fired up.

In addition to the above, it comes with a tailor-made and specially designed car cover.

The undisputed highlight, perhaps on par with the engine and exhaust upgrade, is the IWC Schaffhausen Edition 55 box, which contains a Pilot's Watch Chronograph Edition AMG. The back of the watch is made from grade 5 titanium, and the car's unique chassis number is engraved into it. The high-quality timepiece will be handed over in an IWC Boutique near the buyer's residence.

With only five being built at a lofty price, it remains to be seen whether any will arrive in the US. Considering it's targeted at regular racers in various GT3 series across Europe, though, we doubt it.