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© 2026 - Octane Automotive BV
© 2026 - Octane Automotive BV
The Porsche Cayman GT4 RS is the most extreme mid-engine road Porsche ever produced. Unveiled in 2021 and delivered from 2022 on the 718 generation, it takes the already race-oriented Cayman GT4 and intensifies every component for track performance. The engine comes directly from the 991.2/992 911 GT3 RS: a 4.0-litre naturally aspirated flat-six producing 493 hp at 8,400 rpm with a 9,000 rpm redline. The intake scoops behind the doors are a racing-derived feature that identifies the car at first glance. PDK gearbox only, factory-installed carbon packs, and the optional Weissach package for additional weight saving. A Cayman GT4 RS is not sold to just any buyer; it is passed on to someone who knows the mid-engine RS culture and values the difference between a GT4 and a GT4 RS.
The Porsche Cayman GT4 RS was unveiled in November 2021 as the most extreme mid-engine road Porsche ever built. Like other Porsche RS specifications the GT4 RS marked not merely an evolution of the standard GT4, but a fundamental rethink of the concept. Where the regular 982 Cayman GT4 used a 4.0-litre engine from the 991 Carrera S (420 hp), the GT4 RS received the engine directly from the 991.2/992 911 GT3 RS: the same 4.0-litre naturally aspirated flat-six with 493 hp at 8,400 rpm, and a 9,000 rpm redline. The rev range and racing-derived construction made this the purest naturally aspirated engine ever fitted to a Cayman.
One of the most identifying elements of the GT4 RS is the intake scoops directly behind the doors. These NACA-style scoops feed air directly to the engine intake, providing substantially higher air volume than the standard intake systems of the regular GT4. The design is derived directly from Porsche's racing 911s and is immediately recognisable as an RS feature. Aerodynamics were further reworked with a larger rear wing (adjustable in four positions), a redrawn front spoiler with larger splitter, and factory-installed carbon canards. Total downforce was stated by Porsche as 25 percent higher than the regular GT4.
The GT4 RS was delivered only with a PDK seven-speed gearbox; unlike its predecessor the GT4 (which offered a manual gearbox), no manual option was available. For some enthusiasts this was controversial; for others the PDK was essential for the track-oriented positioning of the RS. The chassis received thoroughly reworked suspension geometry, a double-wishbone front axle derived directly from the 911 GT3, revised Brembo brakes, and factory-installed carbon ceramic brakes as standard. Weight was 1,415 kg, around 35 kg lighter than the regular GT4. With the optional Weissach package this fell further to 1,393 kg.
The optional Weissach package on the GT4 RS includes magnesium wheels (cast in lightweight), carbon anti-roll bars, carbon coupling links, factory-installed graphic stripe (black-silver or black-red), more extensive exterior carbon packs (bonnet, roof shell, carbon bumpers), and specific factory-installed badges. Total weight saving is around 22 kg. For collector-oriented sales, the Weissach package is a substantially price-driving factor; GT4 RS examples with Weissach package are consistently priced higher than standard specifications, often with a premium of many tens of thousands of euros.
The Cayman GT4 RS has seen a consistently high valuation curve since its introduction in 2022. At the original price of around 145,000 euros (standard) to 170,000 euros (Weissach with PTS), allocations were resold for two to three times the original list; by 2024 prices have cooled somewhat but remain robustly above list. For Weissach package examples in factory PTS colour the market sits consistently in a higher class. For sellers this means a well-documented GT4 RS with proven Porsche service history, original specification, and Weissach package confirmation attracts strong international interest. The buyer you want is a Porsche collector who values mid-engine RS culture in its most extreme expression.
The optional Weissach package on the GT4 RS includes magnesium wheels, carbon anti-roll bars, carbon clutch links, factory-installed graphic stripe, and more extensive exterior carbon packs, together saving around 22 kg. For collectors a GT4 RS with Weissach package is consistently priced higher than a standard specification.
The GT4 RS was delivered in factory colours including Arctic Grey, GT Silver Metallic, Shark Blue, Carmine Red, Racing Yellow, plus factory PTS options. For collectors factory PTS colours and factory-installed stripes (black, white, or contrast) strongly drive price.
The intake scoops behind the doors are a defining feature of the GT4 RS. Confirm that all factory-installed RS elements are original: factory aerokit, integrated rear wing with adjustable angle, factory carbon packs interior and exterior, magnesium wheels if Weissach.
Decisive for the GT4 RS, particularly for the Weissach package and factory PTS specifications. The document confirms factory specification, colour, Weissach status, factory carbon packs, and all factory-installed options. Apply via a Porsche dealer or Porsche Classic in Stuttgart.
The GT4 RS uses the 4.0-litre engine from the 991.2 GT3. Service requires specialist GT knowledge: timing chains, head gaskets, cooling system, transaxle oil, PDK software updates. Service at Porsche or a recognised GT specialist is essential.
For collector-oriented buyers low mileage (under 5,000) is generally strongly value-driving. For track-oriented buyers, documented trackday history with proven post-session service at Porsche or Manthey-Werks is attractive; both markets exist in parallel.
Note: These factors may influence buyer interest. Value depends on many factors.
For collectors this is a decisive distinction. Take clear photos of magnesium wheels, carbon anti-roll bars, factory-installed graphic stripe, and more extensive carbon packs. Confirmation via factory documentation or Porsche Classic Certificate of Authenticity is strongly recommended.
Essentially mandatory for top valuation on the GT4 RS, particularly with Weissach package and factory PTS specifications. Apply via a Porsche dealer or Porsche Classic in Stuttgart based on the VIN. Confirms factory specification, Weissach status, and all factory-installed options.
All invoices from a Porsche dealer or recognised GT specialist. The 4.0-litre GT3 engine requires specialist knowledge: timing chains, head gaskets, cooling system, transaxle oil. Document PDK service and software update status. Service at Porsche is essential.
Photos of the NACA-style intake scoops behind the doors in original condition, factory rear wing (adjustable in four positions), front spoiler with splitter, factory carbon canards. All factory-installed elements must be original for collector value.
Paint colour with factory code, Paint-to-Sample confirmation if applicable, factory carbon packs exterior and interior, factory-installed stripes (black, white, or contrast), Weissach graphic stripe if applicable. Original factory order configuration or build sheet reinforces value.
Exact mileage with odometer photos, any trackday participation (date, location, number of sessions), post-session service at Porsche or Manthey-Werks, any damage history. For collector-oriented sales, original condition without modifications is highly valued.
Non-factory exhausts or factory-recognised performance packages (Manthey-Werks for instance) reduce or raise value depending on factory recognition. Document all modifications clearly; keep original parts for refitting. Confirm whether packages are factory-installed or later installation.
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