Porsche Manthey Racing Performance Packages: Track-Bred Precision for Porsche GT Cars

What a “Manthey Package” is designed to do

While exact parts vary by model, the mission is consistent:

1) Enhance handling and stability (not horsepower)

These packages are primarily about cornering speed and driver confidence, not adding engine power. For example, independent track testing of the 718 Cayman GT4 RS Manthey notes the kit does not add power, but focuses on sharper dynamics.

2) Build a stronger aerodynamic platform

More downforce is only useful if the car stays composed—so Manthey pairs aero with suspension tuning to reduce pitch, dive, and roll. Porsche brand ambassador Jörg Bergmeister has described the Manthey-upgraded GT3 RS as diving/pitching/rolling less, creating a more stable aero platform and more consistent downforce.

3) Improve braking feel and repeatability

A frequent “quiet hero” in the kits is the brake hardware—especially stainless/braided brake lines for firmer pedal response and consistency. Manthey’s GT3 RS materials specifically call out upgraded brake components such as steel-sleeved line sets. (Manthey Racing)

Available Manthey packages for Porsche GT models

Availability varies by market and model year, but these are the major, commonly offered kits through Porsche channels and Manthey’s own product pages:

Porsche 911 GT3 RS (992.1) – Manthey Kit

Manthey’s current GT3 RS kit emphasizes a full-system approach: aero + suspension + braking. Manthey highlights “precisely tuned aerodynamic, suspension and high-performance brake components” developed through extensive testing. (Manthey Racing)

Manthey also frames the GT3 RS kit as serious motorsport tech transferred to the road—its own overview mentions heavily revised aerodynamics (including extremely high downforce figures) and a specialized suspension/brake setup as core themes. (Manthey Racing)

Porsche 718 Cayman GT4 RS (982) – Manthey Kit

The GT4 RS kit is pitched as transforming an “uncompromising driver’s car” into a “precision instrument,” with the focus on predictable reactions and clear feedback—classic Manthey language. (Manthey Racing)

Porsche’s own communications around the GT4 RS Manthey kit emphasize it is optimized for track use, and that the modifications focus on aerodynamics and chassis components, with track-oriented brake pads offered as an option. (Manthey Racing)

Porsche 911 GT3 (992 / 992.2) – Manthey Performance Kit

Manthey kits have also expanded beyond RS cars into GT3 territory in multiple markets via Porsche Tequipment channels, again focusing on aero, coilovers, and braking refinements—often with optional lightweight wheels. Dealer and Porsche center materials describe the kit structure and its installation requirements.

Key components you’ll typically see in Manthey kits

Think of the Manthey package as a coordinated “stack” rather than random bolt-ons.

Aerodynamics components

Depending on model, aero upgrades commonly include:

• Larger/re-profiled rear wing and endplates
• Front splitter/lip elements and additional flaps/air guides
• Revised rear diffuser (often with longer fins)
• Underbody vanes and airflow management pieces
• On some models, aero discs (wheel covers) designed to improve aero efficiency and/or downforce

Manthey kit listings for GT models explicitly group aero elements alongside suspension and brake components as a single, tuned system. (Manthey Racing)

Suspension and chassis tuning

Common suspension upgrades include:

• Coilover kits (often multi-way adjustable)
• Model-specific spring rates and top mounts
• Some kits incorporate highly track-focused damping and adjustability aimed at keeping the chassis stable under aero load

For the GT4 RS Manthey kit, Manthey-kit component listings specifically call out a coilover kit with multi-way adjustable damping and related hardware. (manthey-kit.com)

Braking upgrades

Typical braking-related items include:

• Braided/stainless steel brake lines (improves pedal feel/response)
• Optional track-capable brake pads (varies by model/market)
• In some packages, extra attention to repeatability under heat

Porsche-center descriptions of the kits frequently highlight brake line enhancements and optional racing-style pads as part of the track-ready intent.

“Track day” finishing touches

Some packages also include:

• Tow loops/tow straps (model/market dependent)
• Manthey-branded trim or decals
• Door-sill guards or lighting details (varies by kit)

These don’t make the lap time—but they reflect how explicitly these packages are aimed at serious track users.

Benefits: what owners actually gain

More downforce, better balance, more usable grip

The most obvious change is aerodynamic: more downforce means higher cornering speeds and better high-speed stability. But Manthey’s advantage is how the parts are tuned together—so the car doesn’t feel “aero-heavy” in a way that destabilizes braking or turn-in.

Bergmeister’s note about improved stability (less pitch/roll) captures the point: downforce becomes more consistent because the car’s attitude stays flatter.

Faster lap potential (with measurable results on certain models)

Porsche reported the 718 Cayman GT4 RS with Manthey Kit lapped the Nürburgring Nordschleife quicker than the standard GT4 RS, crediting aero and chassis changes as the core reason. (Manthey Racing)

More confidence over a full session, not just one lap

Track-day drivers care about:

• repeatable braking points
• predictable balance
• tire management
• stability in medium/high-speed corners

Manthey’s kit language emphasizes “increased vehicle control at the limit” and “predictable reactions and clear feedback”—exactly what improves consistency across stints. (Manthey Racing)

Where to purchase and where to get it installed

Purchase channel

In many markets, Manthey kits are integrated into Porsche Tequipment / Porsche Center ecosystems and are sold through Manthey-certified Porsche Centers (and in some regions through Manthey/Porsche centers more broadly). Porsche-center pages repeatedly stress that the kits are only available through these channels.

Manthey’s kit site also indicates availability through Manthey and Porsche centers in multiple countries.

Installation requirements

A consistent requirement: installation must be performed by a Manthey-certified Porsche Center. Additionally, some packages specify that key components are tuned as a single system and may need to be installed together rather than piecemeal.

Track-only or street-legal?

Designed for track use—but purchasable for road cars

These kits are engineered for track performance, and Porsche has explicitly described certain kits (like the GT4 RS Manthey kit) as optimized for track use. (Manthey Racing)

Road approval and warranty are a major part of the appeal

In Porsche-center descriptions, Manthey kits are framed as Porsche Tequipment performance parts—with statements that road approval and warranty coverage remain unaffected (market specifics can vary, so the local Porsche Center is still the authority).

Practical takeaway:

• If you own a track-ready Porsche GT model, Manthey packages are aimed directly at you.
• If you drive your GT car on the street, you can still purchase these kits in many markets—but you’re buying components engineered around track dynamics, which can mean firmer ride, sharper response, and more aero presence.

The Manthey philosophy in one sentence

Manthey doesn’t sell “more power.” It sells more control—through aero efficiency, chassis composure, and braking confidence—validated the way Manthey has always validated anything: by testing where mistakes are punished and lap time tells the truth. (Manthey Racing)