Ultimate Track Car
Kellymoss GT4R
A race-proven evolution of the Porsche GT4 RS Clubsport, reengineered by Kellymoss for drivers who demand more from every lap. Limited to 5 builds and 5 kits for 2026.
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2026 Allocation. 5 builds. 5 kits.
Performance. Precision. Uncompromising.
Born from the Porsche GT4 RS Clubsport and reengineered by Kellymoss, the GT4R delivers performance, precision, and grip beyond anything in its class. Track capability defined by the winningest Porsche race team in the world.
The GT4R is built for drivers who live for the perfect lap and demand more than the factory imagined. Engineered by racers. Built for the driven.
A Pro Racing model, as shown here, starts at $320K installed, plus the base vehicle.
2026 allocation is limited to 5 builds and 5 kits.
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Every Modification. Designed with Purpose.
- Full aerodynamic redesign with new front splitter, rear diffuser, and massive rear wing. Adds significant downforce and high-speed stability.
- Wider track with custom fenders and quarter panels. Accommodates 12” front and 13” rear wheels and tires for increased cornering grip.
- Carbon body kit including hood, bumpers, fenders, quarters, rockers, wing, ducts, and diffuser. Reduces mass, increases rigidity, and allows customizable finishes such as raw carbon, clear coat, wrap, or paint.
- Optional center radiator conversion. Simplifies the cooling system, reduces weight, improves airflow, and enhances durability.
- Kellymoss rear suspension system. Exclusive in-house installation engineered to deliver handling precision beyond Cup-car levels.
Replaces the factory strut design with upper and lower control arms, correcting bump steer and camber curves for a significant increase in mechanical grip.
on the dyno
Seeing Is Believing
Passing the Kellymoss GT4R across the scales at Kellymoss found that our modifications resulted in an overall reduction of 240 lbs of weight. This translates to a near 2-second reduction in lap time solely due to reduced weight of the car - a significant win.
Check back for additional testing results as we put the Ultimate Track Car through her paces over the next couple of months.
In the interim, see the Ultimate Track Car perform on the dyno....
The Kellymoss GT4R
is the ultimate statement for the driver who lives for that perfect lap and demands more than the factory imagined.
The result is the Kellymoss GT4R
A fusion of Porsche engineering and Kellymoss ingenuity. Every decision served a singular goal: more grip, more feedback, more connection between driver and machine. From the titanium exhaust that sings like a Cup car to the multilink suspension that glues it to the pavement, every detail was hand-crafted to sharpen performance and shed weight, meaningfully increasing your speed.
The re-sculpted body generates serious downforce, wrapping the car in carbon that’s both functional and beautiful.
From Vision to Track
Step into the GT4R. 2026 allocation is limited to 5 builds and 5 kits.
We're filling a roster for 5 full builds and 5 kits in 2026.
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