• Manthey Racing has released a performance package for the Porsche 992 GT3 RS that generates more than 2,200 lbs (1,000 kg) of downforce.
  • The €76,911 kit includes a carbon panel that replaces the back window with a fin, large wing end plates, and aero wheel covers.
  • Manthey says poor weather at the Nordschleife means it hasn’t tried to beat the stock RS’s 6:49.3 Ring record yet.

No one looks at or drives a current 992 GT3 RS and comes away thinking that Porsche pulled its punches. No one except the loonies at Manthey Racing, that is. The German motorsport outfit has just released its hotly anticipated performance kit for the RS, and it’s even more extreme than the spy shots suggested it might be.

Headlining the show is a huge carbon panel that’s 25 percent lighter than the rear window it replaces and features a shark-like vertical fin that’s reminiscent of the one seen on Porsche’s 963 endurance racer. As well as increasing cornering stability it also pushes away warm air from the radiators, allowing colder, more oxygen-dense air to be drawn into the engine.

Related: 2026 Porsche 911 GT3 RS Prototype Refines Its Aero Game In Nurburgring Test

But that’s far from the only aero upgrade. Also new are the wheel-arch Gurney flaps, a pair of dive planes on the side of the front bumper, and a carbon splitter below. The split rear wing gains an even bigger set of end plates, the rear diffuser is wider and has longer fins and carbon disc-shaped covers smooth airflow around the rear wheels.

The stock GT3 RS already generates a stupendous 1,900 lbs (860 kg) of downforce, but it hugs the ground about as well as a helium balloon next to the Manthey-kitted car, which makes more than 2,205 lbs (1,000 kg) of push at 177 mph (285 kmh).

 Manthey’s 992 GT3 RS Has No Back Window, Offers An Actual Metric Ton Of Downforce

Naturally, that extra force requires new suspension components, so the kit includes special springs that are 30 percent stiffer on the front and 14 percent stiffer out back, along with revised dampers that can be adjusted electronically through three modes, and manually in the Track setting. Racing-spec brake pads round out the mechanical changes because Manthey hasn’t messed with the RS’s 518 hp 525 PS) naturally-aspirated 4.0-liter flat-six.

Manthey developed the €76,911 ($80,300) package in association with the brains at the Porsche R&D base in Weissach and will sell it via official Porsche dealers to customers who still have money to burn after spending $241,300 on the standard GT3 RS. Manthey promises a “significant improvement” over the stock RS’s 6:49.3 ’Ring time but says poor weather in the Eifel region has so far prevented it from recording an official lap. How fast do you think it’ll go?