When even our GT3 RS solution has to be re-engineered
We had already developed a dedicated base carrier system for the Porsche 992 GT3 RS.
This solved one of the most challenging questions: How to mount approximately 400 liters of additional storage space onto a vehicle without a conventional trunk and without standard roof rack attachment points?
Then a customer vehicle arrived featuring a Manthey Racing conversion.
And suddenly, the existing solution was no longer sufficient.
Situations like this demonstrate what vehicle-specific development entails in practice.
Why the GT3 RS with Manthey Kit requires a different roof box mounting interface
The Manthey Kit modifies the 992 GT3 RS at critical aerodynamic points.
Additional fins and further aero components are located in areas that were available for parts of our previous mounting setup in the production configuration.
Consequently, the original concept could not simply be adopted without modification.
The easy solution would have been to tell the customer that the existing roof box configuration was incompatible with their vehicle.
However, that does not align with our approach.
Therefore, we adapted the carrier solution to the car—not the car to our carrier solution.
What is different about the Manthey GT3 RS?
The standard 992 GT3 RS already features an exceptionally aerodynamic design.
The Manthey kit takes it a step further.
Additional aerodynamic elements alter the airflow dynamics and occupy surfaces that remain unobstructed on the production vehicle.
Precisely for this reason, a blanket statement like "fits any GT3 RS" is inadequate for such a vehicle.
We evaluate the actual configuration.
Weissach.
Manthey.
Additional aero components.
And the intended usage.
Only then is the appropriate solution developed.
Why universal carriers are not the answer here
On a standard estate car, a roof rack should ideally be as universal as possible.
On a GT3 RS with a Manthey conversion, we pursue the exact opposite approach.
The more specialized the vehicle, the more specific the technical solution must be.
Consequently, we developed a dedicated base carrier specifically for the 992 GT3 RS.
The Manthey configuration subsequently represented the next developmental milestone.
The system is not engineered despite the car's unique characteristics, but precisely because of them.
Track days and road trips must function in harmony
Many Manthey customers do not modify their vehicles solely to drive them to the local ice cream parlor.
Track days and long-distance driving are integral to how they are used.
This is precisely why a roof box solution that can be quickly dismantled is of particular interest.
During transit, the performance roof box transports luggage, helmets, and other equipment.
Before heading out onto the racetrack, the system is removed.
Afterwards, the GT3 RS can hit the track without the roof box.
The system is then reinstalled, and the journey continues.
Travel performance and track performance do not have to be mutually exclusive.
Approximately 400 liters of storage space on a Manthey GT3 RS
The additional space is especially crucial for the GT3 RS.
The traditional front trunk is omitted to accommodate the cooling system.
With a clubspor tbar or cage installed, the area behind the seats is also severely limited in its utility.
Our performance roof box provides approximately 400 liters of additional storage space.
This transforms a car with severely limited luggage capacity into a vehicle capable of undertaking genuine road trips.
While the Manthey conversion makes the GT3 RS faster on the track, our solution ensures it can still be driven to the track day.
Frequently asked questions about the GT3 RS Manthey roof box
Does the ASPHALTKIND roof box fit a 992 GT3 RS equipped with the Manthey kit?
Yes, although the technical mounting interface must be adapted to the specific Manthey configuration. Additional aero fins alter areas that may be utilized differently on the production version.
Why can't the standard GT3 RS carrier system simply be used?
Manthey aerodynamics modify surfaces and components surrounding the original mounting points. Therefore, we inspect and modify the system on a vehicle-specific basis.
Can the roof box be removed prior to a track day?
Yes. Precisely for this type of use, we place great emphasis on rapid installation and removal.
How much additional storage space does the roof box provide?
Approximately 400 liters.
The more specialized the car, the more compelling the engineering challenge.
A Porsche 992 GT3 RS with the Manthey kit is not a vehicle for off-the-shelf solutions.
Precisely why it is a perfect match for ASPHALTKIND.
We do not develop a one-size-fits-all mounting solution for every car.
We want to understand precisely how this vehicle is utilized and what technical solution best applies.
This is the distinction between mere accessories and true engineering.