Elevating the Porsche 911 GT3: The Manthey Performance Kit

Few production cars see as much track-day action as the Porsche 911 GT3. For drivers who demand even more precision, Porsche has partnered with Manthey to deliver a performance kit that pushes the limits far beyond the Weissach Package. The result is a GT3 engineered for uncompromising speed, control, and efficiency on the circuit.  

Nürburgring-Proven Performance  

With the Manthey Kit, the 911 GT3 conquered the Nürburgring Nordschleife in just 6:52.981 minutes—nearly three seconds faster than its predecessor. Powered by a 4.0-liter naturally aspirated flat-six producing 502 hp and 331 lb-ft of torque, the GT3 combines raw power with finely tuned aerodynamics to achieve remarkable lap times.  

Aerodynamics Refined

• Continuous underbody redesign: turning vanes extended to about 5 feet (1.5 m) and a smooth luggage compartment floor

• Front-end upgrades: extended lip (about 0.5 inches / 12 mm), diffuser fins, and side flaps for sharper front axle downforce

• Rear wing evolution: wider swan-neck wing with Gurney flap and enlarged end plates for optimal airflow

• Carbon aerodiscs: reduce drag and complete the aerodynamic package  

The result? At 177 mph (285 km/h), the GT3 generates about 783 pounds (355 kg) of downforce in road mode, and an astonishing 1,190 pounds (540 kg) in circuit mode.  

Suspension and Braking Precision  

• Four-way adjustable coil over suspension: developed with Manthey, tuned for circuit use, and tool-free adjustment

• Enhanced spring rates: +10% at the front axle for stability under higher downforce

• Braided steel brake lines: standard for precise pressure and control  

• Optional racing brake pads: tailored for the Porsche Ceramic Composite Brake system  

Lightweight Wheels and Customization  

• Forged wheels: 20- and 21-inch options reduce unsprung mass by about 13 pounds (6 kg), available in Brilliant Silver, Neodyme, or Black  

• Sporty accents: carbon door sills with illuminated Manthey lettering, LED door projectors, and customizable aerodiscs  

• Track-ready accessories: tow straps in red, black, or yellow, plus carbon-fibre air outlets and intakes  

Developed by Experts, Delivered Worldwide  

The Manthey Kit was created in close collaboration between Porsche’s Weissach Development Centre and Manthey engineers in Meuspath. Optimized for circuit use, these components are available through Porsche Centers worldwide.  

Isringhausen Imports is proud to be an authorized Manthey dealer and will expertly install a Manthey performance kit on your Porsche vehicle.  Click here to learn more.