The 911 GT3 RS (997.1) is the homologation-special, most track-focused 997.1 — a lightened, wider GT3. It shares the GT3's naturally aspirated 3.6-liter "Mezger" flat-six and a close-ratio six-speed manual with a single-mass flywheel, and like the GT3 that engine does NOT carry the Carrera M96/M97's IMS-bearing or bore-scoring risk.
The RS is the rare hotter variant that is both lighter AND physically wider than the car it's based on: about 44 lb (20 kg) lighter than the GT3, with a rear track roughly 44 mm wider using the wide Carrera 4/Turbo shell for more mechanical grip. The weight comes out via an adjustable carbon-fiber rear wing, a plastic engine lid, a plastic rear window, carbon-fiber bucket seats and the lighter single-mass flywheel; a Club Sport package added a bolt-in roll cage, fire extinguisher and six-point harness.
US NHTSA campaigns for this model. A listed campaign may not apply to a particular car, and may already have been remedied — check a specific car by VIN at nhtsa.gov/recalls.
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