Manthey Kit for Porsche 911 GT3 RS: Track Performance Boost 2025

Engineered for measurable lap-time gains — the Manthey Kit sharpens Porsche’s most focused 911 with pure motorsport hardware.

Purpose-Built Upgrade

The Manthey Kit for the 911 GT3 RS (992) is not a styling package. It’s a factory-backed engineering program designed to increase aerodynamic efficiency, stability, and track consistency.
Developed jointly by Porsche’s Weissach R&D and Manthey Racing in Meuspath, the kit is installed via Porsche Centres and preserves the full manufacturer warranty.

The base car remains unchanged in powertrain:

• Engine: 4.0-litre naturally aspirated flat-six
• Output: 386 kW / 525 hp
• Torque: 465 Nm
• Redline: 9,000 rpm
• Transmission: 7-speed PDK
• Drive: Rear-wheel

What changes are the aerodynamic load, suspension control, and brake response — all quantifiable on track.

Aerodynamics — Over 1 Tonne of Downforce

At 285 km/h, the Manthey-equipped GT3 RS produces >1,000 kg of total downforce — a dramatic increase without added drag.

Key revisions:

• Front: Enlarged spoiler lip with new wing profile and carbon-reinforced supports
• Dive planes: Two per side; plus wheel-arch Gurney flaps for front-axle pressure
• Rear window: Replaced by CFRP panel (–25 % weight) with carbon shark fin derived from the 963 LMDh for yaw stability
• Roof fins (x6): Channel radiator exhaust outward to feed cooler intake air at speed
• Rear wing: Split carbon DRS element, larger end plates
• Diffuser: Widened, longer CFRP fins for rear downforce without penalty
• Aerodiscs: Carbon covers on wheels to reduce turbulence

Every element works in sequence — balanced front to rear — maintaining stability through fast and medium corners.

Suspension — Semi-Active Precision

The semi-active coilover system receives new hardware and logic to exploit higher loads.

• Spring rates: +30 % front / +15 % rear
• Sensors: 4 wheel + 3 body acceleration units feed a new control module
• Dampers: Two-valve design (separate compression/rebound) with independent control
• Modes: Normal / Sport / Track — each with dedicated parameter sets
• In Track mode, baseline settings can be fine-tuned manually via steering-wheel rotaries

The result is faster adaptation to surface changes, tighter body control, and a more consistent aero platform under braking and turn-in.

Brakes — Track-Ready Consistency

Stopping hardware is upgraded for endurance and feel:

• Steel-sheathed brake lines → firmer pedal, quicker response
• Optional racing pads (for PCCB systems) → reduced fade, broader temperature window, extended wear
• Tuned for track-day duty — linear pressure curve, repeatable modulation

These components maintain braking precision even after repeated high-speed deceleration, a known limitation in long sessions with the standard setup.

Lap-Time Logic

Manthey and Porsche tested the kit over thousands of kilometres across European circuits and the Nürburgring Nordschleife.
Data shows notable time gains, especially in medium-speed corners, thanks to higher grip and stability.

Porsche Brand Ambassador Jörg Bergmeister confirms:

“The car dives, pitches, and rolls even less, offering a much more stable aerodynamic platform. The high contact pressure remains constant under all conditions.”

An official Nordschleife time is pending due to weather; Manthey targets a significant improvement over the standard GT3 RS.

Options & Details

Functional accessories support individual setup:

• Illuminated carbon door sills with Manthey lettering
• LED door projectors, colour-matched decals for aerodiscs
• Two eyes (front/rear, red/black/yellow) for circuit use

Availability: Orders open now; installations start in March 2025.

Fuel data (WLTP):

• 13.2 L/100 km combined
• 299 g/km CO₂, Class G

Conclusion

The Manthey Kit doesn’t change the GT3 RS’s character — it perfects it.
More downforce, sharper control, higher stability — every number moves in the right direction.

Source: Porsche Newsroom / Yours Analysis