This New Manthey Porsche 911 GT3 Kit Turns the GT3 Into a Track Monster

Cutting almost three seconds at the Nordschleife is a meaningful step for a car already at the top of its class.

The new Manthey Porsche 911 GT3 kit delivers this gain not through more power, but smarter aero, a refined underbody and chassis updates that let the car carry more speed with confidence.

Visible Aero: Front Lip, Wing and More

Manthey's visible changes include a 12mm-extended front lip, revised front and rear diffuser fins, side flaps, carbon-fibre wheel covers and a wider swan-neck wing with a gurney and inward-curved endplates.

These parts reduce turbulence and increase usable downforce where it matters most at high speed.

Underbody Engineering: The Biggest Gains

Underneath, Manthey extended air deflectors to 1.5 metres (one metre longer than before) and fitted a luggage-compartment under-cover to create a flat floor.

That work produces up to 285kg of downforce at 177mph in Road mode and up to 540kg in Circuit mode, numbers that explain the car's dramatic stability improvements.

Chassis, Brakes and Lightweight Wheels

To match the aero, Manthey added four-stage adjustable coilovers with a 10% stiffer front spring rate versus the 992.1 Manthey spec.

Braided steel brake lines and optional racing pads improve pedal feel and fade resistance, while optional forged 20/21-inch wheels cut 6kg of unsprung mass.

"More downforce and better balance let drivers use the throttle earlier and carry speed through corners," says track engineers—an apt summary for what Manthey's package achieves.

Availability

Manthey offers carbon trim, LED door projectors, coloured carbon-ceramic discs and track-focused extras for owners who want both form and function.

Porsche has not published pricing yet, but expect the kit to appeal to owners prioritizing lap times and track confidence.