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
