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Misty Jain

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  • Published: Aug 26 2025 07:00 PM
  • Last Updated: Aug 26 2025 07:00 PM

Porsche 911 Slantnose prototype spotted at Nürburgring combines classic 1980s Flachbau design with Manthey GT2 RS upgrades and 700 hp power.


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A strange Porsche prototype was seen at the Nürburgring, and we already have people awestruck. It undeniably looks like a current Porsche version of a Slantnose (Flachbau) from the 1980s. The prototype also borrows styling from the Manthey Racing GT2 RS kit, resulting in a beautiful combination of vintage style and maximum track experience. US Porsche enthusiasts may have their dream come true by reviving the nostalgia of the Slantnose with the 2023 version tested out on as many ways as possible on the Nürburgring.

Porsche 911 Slantnose Prototype Key Features

The spy images show several details that distinguish this prototype from a very ordinary car: 

  • Flatter slantnose-like proprietary fronts-end with squared off headlights, not round.
  • Vented hood that uses NACA ducts in order to ensure airflow.
  • Aerodynamic canards and splitter for race-oriented performance.
  • Center-lock wheels with yellow brake calipers. 
  • Aero rear wheel discs that are a salute to its racing heritage. 
  • Massive rear wing, wide diffuser for maximum downforce. 

These characteristics indicate that Porsche is not building a retro-inspired show car, but instead developing a true performance car developed specifically to race on the track.

Porsche or Manthey? The Big Question

One of the questions stirring up debate is, who is behind this build?

  • Porsche Sonderwunsch Program could possible bring back the Slantnose futuristically as a limited heritage model.
  • Manthey Racing, known for going to levels unknown in the GT2 RS might be testing its own product you could say using the 911 GT2 RS MR as the base model.

With the brutal aero elements being features everyone is saying this has Manthey written all over it. Regardless, until they come out and say it officially enthusiasts can only speculate if this is a Porsche sponsored project or a Manthey special edition.

Expected Performance & Engine of Porsche 911 Slantnose

Porsche has not verified specifications so far, but speculation says the prototype is pooled on the GT2 RS MR platform. So, we know:

  • Engine: 3.8-liter twin-turbo flat-six
  • Output: Approximately 700 hp (estimated)
  • Objective: Nürburgring lap records and track supremacy

If all this turns out to be accurate, this would not simply be an homage to an older design. It may be one of the fastest 911s that Porsche—or Manthey—has ever put on the street.

Why It Matters for US Enthusiasts

The Slantnose (Flachbau) has long been an enthusiast's dream in the United States. During the 1980s, it was an expensive and infrequent option on models, which was instantly recognizable for its flat front and exotic look. Nowadays, classic Slantnoses command high dollar values at US auctions. 

Should this limited production model based on the Slantnose nameplate end up in production, American consumers will likely be clambering to buy one. In addition to collectors, I think a lot of track-day drivers would also consider it, as it will provide a nice mix of heritage design and modern speed!

Why the Porsche 911 Slantnose is Special

Why does the Slantnose matter? The Slantnose matters for the Slantnose alone, who's to argue against that? Slantnose is much more than looks. It's an intimidating slice of a daring time in Porsche's history. The original Slantnose departed from tradition and drew attention everywhere to the point of being a polarizing event. This new Slantnose prototype appears to embody this same ethos: daring, conclusive, unique, and unapologetically different. For the older generation of fans, it might be a nostalgic throwback. For the younger generation of fans, it is an opportunity to see Porsche's design history and a glimpse into how Porsche could reinterpret that history for the future.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

A post shared by JoelRe98 (@joelre98)

Porsche 911 Slantnose Prototype Expected Specifications

Feature

Details (Expected)

Engine

3.8L twin-turbo flat-six

Power Output

~700 hp

Platform

GT2 RS MR base

Front Design

Slantnose-style flat front, slim headlights

Aero Package

Canards, splitter, NACA ducts, massive wing, diffuser

Wheels & Brakes

Center-lock wheels, aero discs, yellow calipers

Heritage Link

Inspired by 930 Slantnose (1980s)

Testing Location

Nürburgring, Germany

Possible Name

Porsche “Flachbau”

Conclusion

The new Porsche 911 Slantnose tribute is much more than just another sports car, whether full supported by Porsche or more of a Manthey Racing initiative. The Slantnose is a linkage from the past to the present, bringing back a legendary design and seamlessly combining that with modern day GT2 RS performance. For U.S. enthusiasts, it's more than just having the fastest car; it's a restoration of a legacy that captured the audacious spirit of Porsche. If this goes into production, the Slantnose could easily become one of the most discussed models in Porsche's modern history.

Source(Image / Thumbnail): carscoops

FAQ

The Porsche 911 Slantnose prototype is a new prototype seen at Nürburgring with a classic Slantnose style and the option for Manthey Racingbeings' GT2 RS upgrades. 

"Flachbau" is the German translation of "slantnose," the name Porsche used in the 1980s to develop a very rare, exotic version of the 911. 

This is still unknown. Some believe it is a Porsche Sonderwunsch project, while others believe it is Manthey Racing testing out a GT2 RS-based special. 

If based on the GT2 RS MR, it is estimated to have around 700 horsepower from its twin-turbo flat-six engine. 

If Porsche or Manthey builds it, then it will go into limited production probably, and some will reach the US where it has a strong collector base for Slantnose models.

The 930 Slantnose of the 1980s was an instantaneously recognizable, super rare and super expensive car. It is one of Porsche's most collectible cars of today.

With Manthey's input and the performance of a GT2 RS MR, this prototype assembly could be shooting for a lap record at the Nürburgring.

We do not know when their official release is, but we can take comfort in knowing that if they keep testing it, it should go to its debut at some point in 2026.

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