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GT-department suspension, further track-focused over the GT4.
Large GT-department discs; PCCB carbon-ceramic optional (and part of a weight-saving combination with magnesium wheels).
The 718 Cayman GT4 RS (revealed late 2021, sales from 2022) is the flagship, hardest-edged 982 — the first road-going Cayman to run the 911 GT3's naturally aspirated 4.0-liter flat-six, revving to a 9,000 rpm redline. It is PDK-only (no manual), and it breathes through process-air intakes where the rear side windows would normally be, so the induction noise sits right behind the driver's head.
The RS is a lightweight/track special built on the GT4, but its point is a like-for-like weight DELTA, not a big absolute drop. Porsche's savings — CFRP hood and front fenders, a lightweight glass rear window, reduced sound deadening, NACA brake-cooling ducts, forged wheels (magnesium via the Weissach Package) — largely offset the added downforce hardware and the heavier GT3-derived driveline, so the net curb delta over a GT4 with PDK is modest. A swan-neck fixed rear wing and revised aero make up to 25% more downforce than the GT4.
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No — it's a different car. It gets the 911 GT3's flat-six, is PDK-only, adds carbon-fiber body panels, a lightweight glass rear window, NACA cooling ducts and side-mounted intakes that feed the engine right behind the cabin, and makes meaningfully more downforce than the GT4.
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