718 Cayman GT4 RS

Porsche unveiled the 718 Cayman GT4 RS in November 2021 as the first Cayman to carry the RS suffix. The badge signalled far more than a sharpened GT4: Porsche installed the high-revving engine concept shared with the 911 GT3 and GT3 Cup, redesigned the intake path through the former rear side-window positions and made PDK the only transmission. The result turned the compact mid-engine platform into a distinct RS interpretation rather than a junior copy of a rear-engined 911.

Its EA9A1.5 4.0 B6S flat-six displaces 3,996 cc and produces 368 kW (500 PS) at 8,400 rpm with 450 Nm at 6,750 rpm. Six individual throttle valves, dry-sump lubrication, fixed valve operation and a 9,000 rpm ceiling establish its GT3-derived character. A seven-speed PDK with a mechanical rear differential lock drives the rear wheels. There was no factory manual road version, so any claim combining GT4 RS engine figures with a six-speed manual describes a conversion or a different model.

The defining induction system replaces the two small rear side windows with process-air inlets. Air travels from each side into a central airbox directly behind the occupants, shortening the route and deliberately making induction sound part of the cabin experience. This is authored acoustic engineering, not incidental noise or exterior styling. It also means a faithful archive needs simultaneous cabin and exterior perspectives: the sound heard by the driver is dominated by an intake location that a trackside microphone cannot reproduce.

Functional body changes extend beyond the intakes. The car sits 30 mm lower than a standard Cayman, uses front wheel-arch ventilation, an aerodynamically optimised underbody and diffuser, an adjustable front diffuser and a swan-neck rear wing. Porsche stated that Performance mode can generate up to 25 percent more downforce than the 718 Cayman GT4. At 1,415 kg DIN, with 0–100 km/h in 3.4 seconds and 315 km/h, the complete package prioritises response and circuit performance without duplicating the heavier 911 RS aero concept.

The optional Weissach Package changes visible materials and equipment, while magnesium wheels form another configuration-sensitive choice. The road car also has a related GT4 RS Clubsport competition model, but the two are not interchangeable: racing safety, suspension, transmission calibration and homologation differ. A cage, decals or track history cannot transform one identity into the other. Premium records must distinguish standard road, Weissach-equipped road and Clubsport race specifications before attaching mass, provenance or performance claims.

For audio verification, the original side-window ducts, airbox, six throttles, calibration, catalysts, particulate filters and lightweight stainless exhaust all matter. Intake resonance can overwhelm the cabin recording near the top of the range, while PDK creates fast, repeatable shifts and automated downshifts. Microphone position, window state, engine temperature and selected transmission and exhaust modes should accompany every file. A modified exhaust alone cannot stand in for the production car because the factory’s most unusual sound work occurs upstream at the intake.

The focus here is the 2021–2025 Type 982 road-going 718 Cayman GT4 RS. It excludes the manual 718 Cayman GT4, 981 GT4, Spyder RS and GT4 RS Clubsport. That boundary protects the feature that gives the car exceptional editorial and search value: a GT3-derived 9,000 rpm engine heard through an intake placed immediately behind the occupants, within a mid-engine chassis and PDK-only road specification. Those facts define authenticity; for newcomers, they explain instantly why this Cayman sounds and behaves unlike the rest of its family.