Powered by a naturally aspirated 4.0-liter flat-six engine producing 510 horsepower, the GT3 bettered the previous record holder by more than 9.5 seconds, despite competing against cars with higher peak output. The result highlights Porsche’s emphasis on balance, aerodynamics, and chassis precision rather than outright power alone.

The new GT3 features sharpened aerodynamics and reduced weight. Revised front aerodynamic elements—including the diffuser, spoiler lip, and underbody fins—improve airflow and increase downforce. Redesigned Matrix LED headlamps integrate all lighting functions into a single unit, allowing for larger front air intakes. At the rear, a redesigned diffuser, cooling inlets, and newly angled wing sideplates enhance aerodynamic efficiency and thermal management.

Chassis revisions further elevate performance. The double-wishbone front suspension now features aerodynamically shaped trailing arms adopted from the 911 GT3 RS, improving high-speed stability and brake cooling. Relocated ball-joint mountings reduce pitching under heavy braking, contributing to more consistent control on road and track.

The optional Manthey Kit builds on the already impressive Weissach package, which helped the 911 GT3 set its record lap time. With the Manthey Kit, the lap time drops further to 6 minutes 52.981 seconds.

The Manthey Kit transforms the entire 911 GT3’s underbody into a continuous aerodynamic element. The air deflector elements on the underbody (also known as turning vanes) have been extended by one meter, to 1.5 meters. In addition, the luggage compartment floor of the production vehicle now has a cover, creating a completely smooth underbody.

The front lip has been redesigned and extended forward by 12 millimeters. Special front diffusor fins in the front underbody and flaps attached to the sides of the vehicle increase downforce at the front axle. The wing of the 911 GT3 with swan-neck mounts is wider and now features a Gurney flap. The end plates have been enlarged and are visibly curved inwards to achieve optimal airflow. The rear diffuser, featuring longer fins, increases downforce without increasing drag.

The carbon-fiber wheel covers (aerodiscs) at the rear reduce drag, completing the interaction of all the car’s aerodynamic components to optimize airflow and maximize overall efficiency. Overall, downforce is greatly increased while drag remains the same. At 285 km/h, the 911 GT3 with Manthey Kit in road mode produces 355 kilograms of total downforce. In circuit mode, which must not be used on public roads, the downforce increases to 540 kilograms at 285 km/h.

Together with Manthey, Porsche has developed a special four-way coil over suspension for the 911 GT3 that can be adapted for circuit use. The suspension struts are four-way adjustable, and the rebound and compression can be adjusted without tools. Braided steel brake lines are included as standard in the kit. This guarantees very precise pressure and optimum brake control. As an option, special racing brake pads for the Porsche Ceramic Composite Brake (PCCB) system are available for the Porsche GT3 with Manthey Kit as are lightweight 20- and 21-inch forged wheels.

Currently, the Manthey package has been sold out, but buyers can still opt to order their 911 GT3 with the impressive Weissach at Porsche Center Philippines.